Merge Gabe's changes with mine.

--HG--
extra : convert_revision : f50ed42e7acb3f11e610fd6976eaa8df0c6ba2ab

63 files changed, 3641 insertions, 1105 deletions

diff --git a/src/arch/alpha/faults.hh b/src/arch/alpha/faults.hh
index 6342122c2..ed0c3a6b1 100644
--- a/src/arch/alpha/faults.hh
+++ b/src/arch/alpha/faults.hh
@@ -66,10 +66,10 @@ class MachineCheckFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
-    bool isMachineCheckFault() {return true;}
+    bool isMachineCheckFault() const {return true;}
 };
 
 class AlignmentFault : public AlphaFault
@@ -79,10 +79,10 @@ class AlignmentFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
-    bool isAlignmentFault() {return true;}
+    bool isAlignmentFault() const {return true;}
 };
 
 static inline Fault genMachineCheckFault()
@@ -102,7 +102,7 @@ class ResetFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -116,7 +116,7 @@ class ArithmeticFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
@@ -133,7 +133,7 @@ class InterruptFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -150,7 +150,7 @@ class DtbFault : public AlphaFault
         : vaddr(_vaddr), reqFlags(_reqFlags), flags(_flags)
     { }
 #endif
-    FaultName name() = 0;
+    FaultName name() const = 0;
     FaultVect vect() = 0;
     FaultStat & countStat() = 0;
 #if FULL_SYSTEM
@@ -170,7 +170,7 @@ class NDtbMissFault : public DtbFault
         : DtbFault(vaddr, reqFlags, flags)
     { }
 #endif
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -187,7 +187,7 @@ class PDtbMissFault : public DtbFault
         : DtbFault(vaddr, reqFlags, flags)
     { }
 #endif
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -204,7 +204,7 @@ class DtbPageFault : public DtbFault
         : DtbFault(vaddr, reqFlags, flags)
     { }
 #endif
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -221,7 +221,7 @@ class DtbAcvFault : public DtbFault
         : DtbFault(vaddr, reqFlags, flags)
     { }
 #endif
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -238,7 +238,7 @@ class DtbAlignmentFault : public DtbFault
         : DtbFault(vaddr, reqFlags, flags)
     { }
 #endif
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -251,7 +251,7 @@ class ItbFault : public AlphaFault
     ItbFault(Addr _pc)
         : pc(_pc)
     { }
-    FaultName name() = 0;
+    FaultName name() const = 0;
     FaultVect vect() = 0;
     FaultStat & countStat() = 0;
 #if FULL_SYSTEM
@@ -269,7 +269,7 @@ class ItbMissFault : public ItbFault
     ItbMissFault(Addr pc)
         : ItbFault(pc)
     { }
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -284,7 +284,7 @@ class ItbPageFault : public ItbFault
     ItbPageFault(Addr pc)
         : ItbFault(pc)
     { }
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -299,7 +299,7 @@ class ItbAcvFault : public ItbFault
     ItbAcvFault(Addr pc)
         : ItbFault(pc)
     { }
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -311,7 +311,7 @@ class UnimplementedOpcodeFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -323,7 +323,7 @@ class FloatEnableFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -337,7 +337,7 @@ class PalFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -349,7 +349,7 @@ class IntegerOverflowFault : public AlphaFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
diff --git a/src/arch/isa_parser.py b/src/arch/isa_parser.py
index 754a64fdb..64a120c4c 100755
--- a/src/arch/isa_parser.py
+++ b/src/arch/isa_parser.py
@@ -134,7 +134,7 @@ def t_INTLIT(t):
     try:
         t.value = int(t.value,0)
     except ValueError:
-        error(t.lineno, 'Integer value "%s" too large' % t.value)
+        error(t.lexer.lineno, 'Integer value "%s" too large' % t.value)
         t.value = 0
     return t
 
@@ -144,7 +144,7 @@ def t_STRLIT(t):
     r"(?m)'([^'])+'"
     # strip off quotes
     t.value = t.value[1:-1]
-    t.lineno += t.value.count('\n')
+    t.lexer.lineno += t.value.count('\n')
     return t
 
 
@@ -154,22 +154,22 @@ def t_CODELIT(t):
     r"(?m)\{\{([^\}]|}(?!\}))+\}\}"
     # strip off {{ & }}
     t.value = t.value[2:-2]
-    t.lineno += t.value.count('\n')
+    t.lexer.lineno += t.value.count('\n')
     return t
 
 def t_CPPDIRECTIVE(t):
     r'^\#[^\#].*\n'
-    t.lineno += t.value.count('\n')
+    t.lexer.lineno += t.value.count('\n')
     return t
 
 def t_NEWFILE(t):
     r'^\#\#newfile\s+"[\w/.-]*"'
-    fileNameStack.push((t.value[11:-1], t.lineno))
-    t.lineno = 0
+    fileNameStack.push((t.value[11:-1], t.lexer.lineno))
+    t.lexer.lineno = 0
 
 def t_ENDFILE(t):
     r'^\#\#endfile'
-    (old_filename, t.lineno) = fileNameStack.pop()
+    (old_filename, t.lexer.lineno) = fileNameStack.pop()
 
 #
 # The functions t_NEWLINE, t_ignore, and t_error are
@@ -179,7 +179,7 @@ def t_ENDFILE(t):
 # Newlines
 def t_NEWLINE(t):
     r'\n+'
-    t.lineno += t.value.count('\n')
+    t.lexer.lineno += t.value.count('\n')
 
 # Comments
 def t_comment(t):
@@ -190,7 +190,7 @@ t_ignore           = ' \t\x0c'
 
 # Error handler
 def t_error(t):
-    error(t.lineno, "illegal character '%s'" % t.value[0])
+    error(t.lexer.lineno, "illegal character '%s'" % t.value[0])
     t.skip(1)
 
 # Build the lexer
@@ -318,7 +318,7 @@ def p_global_let(t):
     try:
         exec fixPythonIndentation(t[2]) in exportContext
     except Exception, exc:
-        error(t.lineno(1),
+        error(t.lexer.lineno,
               'error: %s in global let block "%s".' % (exc, t[2]))
     t[0] = GenCode(header_output = exportContext["header_output"],
                    decoder_output = exportContext["decoder_output"],
@@ -332,9 +332,9 @@ def p_def_operand_types(t):
     try:
         userDict = eval('{' + t[3] + '}')
     except Exception, exc:
-        error(t.lineno(1),
+        error(t.lexer.lineno,
               'error: %s in def operand_types block "%s".' % (exc, t[3]))
-    buildOperandTypeMap(userDict, t.lineno(1))
+    buildOperandTypeMap(userDict, t.lexer.lineno)
     t[0] = GenCode() # contributes nothing to the output C++ file
 
 # Define the mapping from operand names to operand classes and other
@@ -342,14 +342,14 @@ def p_def_operand_types(t):
 def p_def_operands(t):
     'def_operands : DEF OPERANDS CODELIT SEMI'
     if not globals().has_key('operandTypeMap'):
-        error(t.lineno(1),
+        error(t.lexer.lineno,
               'error: operand types must be defined before operands')
     try:
         userDict = eval('{' + t[3] + '}')
     except Exception, exc:
-        error(t.lineno(1),
+        error(t.lexer.lineno,
               'error: %s in def operands block "%s".' % (exc, t[3]))
-    buildOperandNameMap(userDict, t.lineno(1))
+    buildOperandNameMap(userDict, t.lexer.lineno)
     t[0] = GenCode() # contributes nothing to the output C++ file
 
 # A bitfield definition looks like:
@@ -376,7 +376,7 @@ def p_def_bitfield_1(t):
 def p_def_bitfield_struct(t):
     'def_bitfield_struct : DEF opt_signed BITFIELD ID id_with_dot SEMI'
     if (t[2] != ''):
-        error(t.lineno(1), 'error: structure bitfields are always unsigned.')
+        error(t.lexer.lineno, 'error: structure bitfields are always unsigned.')
     expr = 'machInst.%s' % t[5]
     hash_define = '#undef %s\n#define %s\t%s\n' % (t[4], t[4], expr)
     t[0] = GenCode(header_output = hash_define)
@@ -410,7 +410,7 @@ def p_def_template(t):
 def p_def_format(t):
     'def_format : DEF FORMAT ID LPAREN param_list RPAREN CODELIT SEMI'
     (id, params, code) = (t[3], t[5], t[7])
-    defFormat(id, params, code, t.lineno(1))
+    defFormat(id, params, code, t.lexer.lineno)
     t[0] = GenCode()
 
 # The formal parameter list for an instruction format is a possibly
@@ -520,7 +520,7 @@ def p_decode_stmt_list_0(t):
 def p_decode_stmt_list_1(t):
     'decode_stmt_list : decode_stmt decode_stmt_list'
     if (t[1].has_decode_default and t[2].has_decode_default):
-        error(t.lineno(1), 'Two default cases in decode block')
+        error(t.lexer.lineno, 'Two default cases in decode block')
     t[0] = t[1] + t[2]
 
 #
@@ -565,7 +565,7 @@ def p_push_format_id(t):
         formatStack.push(formatMap[t[1]])
         t[0] = ('', '// format %s' % t[1])
     except KeyError:
-        error(t.lineno(1), 'instruction format "%s" not defined.' % t[1])
+        error(t.lexer.lineno, 'instruction format "%s" not defined.' % t[1])
 
 # Nested decode block: if the value of the current field matches the
 # specified constant, do a nested decode on some other field.
@@ -617,7 +617,7 @@ def p_inst_0(t):
     'inst : ID LPAREN arg_list RPAREN'
     # Pass the ID and arg list to the current format class to deal with.
     currentFormat = formatStack.top()
-    codeObj = currentFormat.defineInst(t[1], t[3], t.lineno(1))
+    codeObj = currentFormat.defineInst(t[1], t[3], t.lexer.lineno)
     args = ','.join(map(str, t[3]))
     args = re.sub('(?m)^', '//', args)
     args = re.sub('^//', '', args)
@@ -632,8 +632,8 @@ def p_inst_1(t):
     try:
         format = formatMap[t[1]]
     except KeyError:
-        error(t.lineno(1), 'instruction format "%s" not defined.' % t[1])
-    codeObj = format.defineInst(t[3], t[5], t.lineno(1))
+        error(t.lexer.lineno, 'instruction format "%s" not defined.' % t[1])
+    codeObj = format.defineInst(t[3], t[5], t.lexer.lineno)
     comment = '\n// %s::%s(%s)\n' % (t[1], t[3], t[5])
     codeObj.prepend_all(comment)
     t[0] = codeObj
@@ -722,7 +722,7 @@ def p_empty(t):
 # *token*, not a grammar symbol (hence the need to use t.value)
 def p_error(t):
     if t:
-        error(t.lineno, "syntax error at '%s'" % t.value)
+        error(t.lexer.lineno, "syntax error at '%s'" % t.value)
     else:
         error(0, "unknown syntax error", True)
 
diff --git a/src/arch/mips/faults.hh b/src/arch/mips/faults.hh
index 05a86acd7..2e5aa81d6 100644
--- a/src/arch/mips/faults.hh
+++ b/src/arch/mips/faults.hh
@@ -61,10 +61,10 @@ class MachineCheckFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
-    bool isMachineCheckFault() {return true;}
+    bool isMachineCheckFault() const {return true;}
 };
 
 class AlignmentFault : public MipsFault
@@ -74,10 +74,10 @@ class AlignmentFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
-    bool isAlignmentFault() {return true;}
+    bool isAlignmentFault() const {return true;}
 };
 
 class UnimplementedOpcodeFault : public MipsFault
@@ -87,7 +87,7 @@ class UnimplementedOpcodeFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -133,7 +133,7 @@ class ResetFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc);
@@ -146,7 +146,7 @@ class CoprocessorUnusableFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc);
@@ -159,7 +159,7 @@ class ReservedInstructionFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc);
@@ -172,7 +172,7 @@ class ThreadFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc);
@@ -188,7 +188,7 @@ class ArithmeticFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
@@ -205,7 +205,7 @@ class InterruptFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -217,7 +217,7 @@ class NDtbMissFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -229,7 +229,7 @@ class PDtbMissFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -241,7 +241,7 @@ class DtbPageFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -253,7 +253,7 @@ class DtbAcvFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -265,7 +265,7 @@ class ItbMissFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -277,7 +277,7 @@ class ItbPageFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -289,7 +289,7 @@ class ItbAcvFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -301,7 +301,7 @@ class FloatEnableFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -313,7 +313,7 @@ class IntegerOverflowFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
 };
@@ -325,7 +325,7 @@ class DspStateDisabledFault : public MipsFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-    FaultName name() {return _name;}
+    FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc);
diff --git a/src/arch/sparc/faults.hh b/src/arch/sparc/faults.hh
index 10ef89279..2456ad28a 100644
--- a/src/arch/sparc/faults.hh
+++ b/src/arch/sparc/faults.hh
@@ -65,7 +65,6 @@ class SparcFaultBase : public FaultBase
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc);
 #endif
-    virtual FaultName name() = 0;
     virtual TrapType trapType() = 0;
     virtual FaultPriority priority() = 0;
     virtual FaultStat & countStat() = 0;
@@ -78,7 +77,7 @@ class SparcFault : public SparcFaultBase
   protected:
     static FaultVals vals;
   public:
-    FaultName name() {return vals.name;}
+    FaultName name() const {return vals.name;}
     TrapType trapType() {return vals.trapType;}
     FaultPriority priority() {return vals.priority;}
     FaultStat & countStat() {return vals.count;}
@@ -133,7 +132,7 @@ class InternalProcessorError :
     public SparcFault<InternalProcessorError>
 {
   public:
-    bool isMachineCheckFault() {return true;}
+    bool isMachineCheckFault() const {return true;}
 };
 
 class InstructionInvalidTSBEntry : public SparcFault<InstructionInvalidTSBEntry> {};
@@ -152,7 +151,7 @@ class MemAddressNotAligned :
     public SparcFault<MemAddressNotAligned>
 {
   public:
-    bool isAlignmentFault() {return true;}
+    bool isAlignmentFault() const {return true;}
 };
 
 class LDDFMemAddressNotAligned : public SparcFault<LDDFMemAddressNotAligned> {};
diff --git a/src/arch/x86/SConscript b/src/arch/x86/SConscript
index 6de243c9c..e8f8059ce 100644
--- a/src/arch/x86/SConscript
+++ b/src/arch/x86/SConscript
@@ -87,6 +87,9 @@ Import('*')
 if env['TARGET_ISA'] == 'x86':
     Source('emulenv.cc')
     Source('floatregfile.cc')
+    Source('insts/microldstop.cc')
+    Source('insts/microregop.cc')
+    Source('insts/static_inst.cc')
     Source('intregfile.cc')
     Source('miscregfile.cc')
     Source('predecoder.cc')
diff --git a/src/arch/x86/emulenv.cc b/src/arch/x86/emulenv.cc
index e3f703cff..3a54d7365 100644
--- a/src/arch/x86/emulenv.cc
+++ b/src/arch/x86/emulenv.cc
@@ -66,8 +66,8 @@ void EmulEnv::doModRM(const ExtMachInst & machInst)
     //Use the SIB byte for addressing if the modrm byte calls for it.
     if (machInst.modRM.rm == 4 && machInst.addrSize != 2) {
         scale = 1 << machInst.sib.scale;
-        index = machInst.sib.index;
-        base = machInst.sib.base;
+        index = machInst.sib.index | (machInst.rex.x << 3);
+        base = machInst.sib.base | (machInst.rex.b << 3);
         //In this special case, we don't use a base. The displacement also
         //changes, but that's managed by the predecoder.
         if (machInst.sib.base == INTREG_RBP && machInst.modRM.mod == 0)
@@ -80,11 +80,13 @@ void EmulEnv::doModRM(const ExtMachInst & machInst)
             warn("I'm not really using 16 bit MODRM like I'm supposed to!\n");
         } else {
             scale = 0;
-            base = machInst.modRM.rm;
+            base = machInst.modRM.rm | (machInst.rex.b << 3);
             if (machInst.modRM.mod == 0 && machInst.modRM.rm == 5) {
                 base = NUM_INTREGS;
-                if (machInst.mode.submode == SixtyFourBitMode)
-                    base = NUM_INTREGS+7;
+                //Since we need to use a different encoding of this
+                //instruction anyway, just ignore the base in those cases
+//                if (machInst.mode.submode == SixtyFourBitMode)
+//                    base = NUM_INTREGS+7;
             }
         }
     }
diff --git a/src/arch/x86/faults.hh b/src/arch/x86/faults.hh
index 8c9afcdb5..51c34cebd 100644
--- a/src/arch/x86/faults.hh
+++ b/src/arch/x86/faults.hh
@@ -66,7 +66,7 @@ namespace X86ISA
     class X86Fault : public FaultBase
     {
       protected:
-        const char * name()
+        const char * name() const
         {
             return "generic_x86_fault";
         }
@@ -80,7 +80,7 @@ namespace X86ISA
     class UnimpInstFault : public FaultBase
     {
       public:
-        const char * name()
+        const char * name() const
         {
             return "unimplemented_micro";
         }
diff --git a/src/arch/x86/insts/microldstop.cc b/src/arch/x86/insts/microldstop.cc
new file mode 100644
index 000000000..8a52ad932
--- /dev/null
+++ b/src/arch/x86/insts/microldstop.cc
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#include "arch/x86/insts/microldstop.hh"
+#include <string>
+
+namespace X86ISA
+{
+    std::string LdStOp::generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const
+    {
+        std::stringstream response;
+
+        printMnemonic(response, instMnem, mnemonic);
+        printReg(response, data, dataSize);
+        response << ", ";
+        printSegment(response, segment);
+        ccprintf(response, ":[%d*", scale);
+        printReg(response, index, addressSize);
+        response << " + ";
+        printReg(response, base, addressSize);
+        ccprintf(response, " + %#x]", disp);
+        return response.str();
+    }
+}
diff --git a/src/arch/x86/insts/microldstop.hh b/src/arch/x86/insts/microldstop.hh
new file mode 100644
index 000000000..f90d6670e
--- /dev/null
+++ b/src/arch/x86/insts/microldstop.hh
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_X86_INSTS_MICROLDSTOP_HH__
+#define __ARCH_X86_INSTS_MICROLDSTOP_HH__
+
+#include "arch/x86/insts/microop.hh"
+
+namespace X86ISA
+{
+    /**
+     * Base class for load and store ops
+     */
+    class LdStOp : public X86MicroopBase
+    {
+      protected:
+        const uint8_t scale;
+        const RegIndex index;
+        const RegIndex base;
+        const uint64_t disp;
+        const uint8_t segment;
+        const RegIndex data;
+        const uint8_t dataSize;
+        const uint8_t addressSize;
+
+        //Constructor
+        LdStOp(ExtMachInst _machInst,
+                const char * mnem, const char * _instMnem,
+                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
+                uint8_t _scale, RegIndex _index, RegIndex _base,
+                uint64_t _disp, uint8_t _segment,
+                RegIndex _data,
+                uint8_t _dataSize, uint8_t _addressSize,
+                OpClass __opClass) :
+        X86MicroopBase(machInst, mnem, _instMnem,
+                isMicro, isDelayed, isFirst, isLast, __opClass),
+                scale(_scale), index(_index), base(_base),
+                disp(_disp), segment(_segment),
+                data(_data),
+                dataSize(_dataSize), addressSize(_addressSize)
+        {}
+
+        std::string generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const;
+    };
+}
+
+#endif //__ARCH_X86_INSTS_MICROLDSTOP_HH__
diff --git a/src/arch/x86/insts/microop.hh b/src/arch/x86/insts/microop.hh
new file mode 100644
index 000000000..45e1cb5c8
--- /dev/null
+++ b/src/arch/x86/insts/microop.hh
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_X86_INSTS_MICROOP_HH__
+#define __ARCH_X86_INSTS_MICROOP_HH__
+
+#include "arch/x86/insts/static_inst.hh"
+
+namespace X86ISA
+{
+    //A class which is the base of all x86 micro ops. It provides a function to
+    //set necessary flags appropriately.
+    class X86MicroopBase : public X86StaticInst
+    {
+      protected:
+        const char * instMnem;
+        uint8_t opSize;
+        uint8_t addrSize;
+
+        X86MicroopBase(ExtMachInst _machInst,
+                const char *mnem, const char *_instMnem,
+                bool isMicro, bool isDelayed,
+                bool isFirst, bool isLast,
+                OpClass __opClass) :
+            X86ISA::X86StaticInst(mnem, _machInst, __opClass),
+            instMnem(_instMnem)
+        {
+            flags[IsMicroop] = isMicro;
+            flags[IsDelayedCommit] = isDelayed;
+            flags[IsFirstMicroop] = isFirst;
+            flags[IsLastMicroop] = isLast;
+        }
+
+        std::string generateDisassembly(Addr pc,
+                const SymbolTable *symtab) const
+        {
+            std::stringstream ss;
+
+            ccprintf(ss, "\t%s.%s", instMnem, mnemonic);
+
+            return ss.str();
+        }
+    };
+}
+
+#endif //__ARCH_X86_INSTS_MICROOP_HH__
diff --git a/src/arch/x86/insts/microregop.cc b/src/arch/x86/insts/microregop.cc
new file mode 100644
index 000000000..976b04688
--- /dev/null
+++ b/src/arch/x86/insts/microregop.cc
@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#include "arch/x86/insts/microregop.hh"
+#include "arch/x86/miscregs.hh"
+#include "base/condcodes.hh"
+#include <string>
+
+namespace X86ISA
+{
+    uint64_t RegOpBase::genFlags(uint64_t oldFlags, uint64_t flagMask,
+            uint64_t _dest, uint64_t _src1, uint64_t _src2,
+            bool subtract) const
+    {
+        DPRINTF(Sparc, "flagMask = %#x\n", flagMask);
+        uint64_t flags = oldFlags & ~flagMask;
+        if(flagMask & CFBit)
+            if(findCarry(dataSize*8, _dest, _src1, _src2))
+                flags |= CFBit;
+            if(subtract)
+                flags ^= CFBit;
+        if(flagMask & PFBit && findParity(dataSize*8, _dest))
+            flags |= PFBit;
+        if(flagMask & ECFBit && findCarry(dataSize*8, _dest, _src1, _src2))
+            flags |= ECFBit;
+        if(flagMask & AFBit)
+            if(findCarry(4, _dest, _src1, _src2))
+                flags |= AFBit;
+            if(subtract)
+                flags ^= AFBit;
+        if(flagMask & EZFBit && findZero(dataSize*8, _dest))
+            flags |= EZFBit;
+        if(flagMask & ZFBit && findZero(dataSize*8, _dest))
+            flags |= ZFBit;
+        if(flagMask & SFBit && findNegative(dataSize*8, _dest))
+            flags |= SFBit;
+        if(flagMask & OFBit && findOverflow(dataSize*8, _dest, _src1, _src2))
+            flags |= OFBit;
+        return flags;
+    }
+
+    bool RegOpBase::checkCondition(uint64_t flags) const
+    {
+        CCFlagBits ccflags = flags;
+        switch(ext)
+        {
+          case ConditionTests::True:
+            return true;
+          case ConditionTests::ECF:
+            return ccflags.ECF;
+          case ConditionTests::EZF:
+            return ccflags.EZF;
+          case ConditionTests::SZnZF:
+            return !(!ccflags.EZF & ccflags.ZF);
+          case ConditionTests::MSTRZ:
+            panic("This condition is not implemented!");
+          case ConditionTests::STRZ:
+            panic("This condition is not implemented!");
+          case ConditionTests::MSTRC:
+            panic("This condition is not implemented!");
+          case ConditionTests::STRZnZF:
+            panic("This condition is not implemented!");
+          case ConditionTests::OF:
+            return ccflags.OF;
+          case ConditionTests::CF:
+            return ccflags.CF;
+          case ConditionTests::ZF:
+            return ccflags.ZF;
+          case ConditionTests::CvZF:
+            return ccflags.CF | ccflags.ZF;
+          case ConditionTests::SF:
+            return ccflags.SF;
+          case ConditionTests::PF:
+            return ccflags.PF;
+          case ConditionTests::SxOF:
+            return ccflags.SF ^ ccflags.OF;
+          case ConditionTests::SxOvZF:
+            return ccflags.SF ^ ccflags.OF | ccflags.ZF;
+          case ConditionTests::False:
+            return false;
+          case ConditionTests::NotECF:
+            return !ccflags.ECF;
+          case ConditionTests::NotEZF:
+            return !ccflags.EZF;
+          case ConditionTests::NotSZnZF:
+            return !ccflags.EZF & ccflags.ZF;
+          case ConditionTests::NotMSTRZ:
+            panic("This condition is not implemented!");
+          case ConditionTests::NotSTRZ:
+            panic("This condition is not implemented!");
+          case ConditionTests::NotMSTRC:
+            panic("This condition is not implemented!");
+          case ConditionTests::NotSTRZnZF:
+            panic("This condition is not implemented!");
+          case ConditionTests::NotOF:
+            return !ccflags.OF;
+          case ConditionTests::NotCF:
+            return !ccflags.CF;
+          case ConditionTests::NotZF:
+            return !ccflags.ZF;
+          case ConditionTests::NotCvZF:
+            return !(ccflags.CF | ccflags.ZF);
+          case ConditionTests::NotSF:
+            return !ccflags.SF;
+          case ConditionTests::NotPF:
+            return !ccflags.PF;
+          case ConditionTests::NotSxOF:
+            return !(ccflags.SF ^ ccflags.OF);
+          case ConditionTests::NotSxOvZF:
+            return !(ccflags.SF ^ ccflags.OF | ccflags.ZF);
+        }
+        panic("Unknown condition: %d\n", ext);
+        return true;
+    }
+
+    std::string RegOp::generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const
+    {
+        std::stringstream response;
+
+        printMnemonic(response, instMnem, mnemonic);
+        printReg(response, dest, dataSize);
+        response << ", ";
+        printReg(response, src1, dataSize);
+        response << ", ";
+        printReg(response, src2, dataSize);
+        return response.str();
+    }
+
+    std::string RegOpImm::generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const
+    {
+        std::stringstream response;
+
+        printMnemonic(response, instMnem, mnemonic);
+        printReg(response, dest, dataSize);
+        response << ", ";
+        printReg(response, src1, dataSize);
+        ccprintf(response, ", %#x", imm8);
+        return response.str();
+    }
+}
diff --git a/src/arch/x86/insts/microregop.hh b/src/arch/x86/insts/microregop.hh
new file mode 100644
index 000000000..f411c0775
--- /dev/null
+++ b/src/arch/x86/insts/microregop.hh
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_X86_INSTS_MICROREGOP_HH__
+#define __ARCH_X86_INSTS_MICROREGOP_HH__
+
+#include "arch/x86/insts/microop.hh"
+
+namespace X86ISA
+{
+    namespace ConditionTests
+    {
+        enum CondTest {
+            True,
+            NotFalse = True,
+            ECF,
+            EZF,
+            SZnZF,
+            MSTRZ,
+            STRZ,
+            MSTRC,
+            STRZnZF,
+            OF,
+            CF,
+            ZF,
+            CvZF,
+            SF,
+            PF,
+            SxOF,
+            SxOvZF,
+
+            False,
+            NotTrue = False,
+            NotECF,
+            NotEZF,
+            NotSZnZF,
+            NotMSTRZ,
+            NotSTRZ,
+            NotMSTRC,
+            NotSTRZnZF,
+            NotOF,
+            NotCF,
+            NotZF,
+            NotCvZF,
+            NotSF,
+            NotPF,
+            NotSxOF,
+            NotSxOvZF
+        };
+    }
+
+    /**
+     * Base classes for RegOps which provides a generateDisassembly method.
+     */
+    class RegOpBase : public X86MicroopBase
+    {
+      protected:
+        const RegIndex src1;
+        const RegIndex dest;
+        const uint8_t dataSize;
+        const uint16_t ext;
+
+        // Constructor
+        RegOpBase(ExtMachInst _machInst,
+                const char *mnem, const char *_instMnem,
+                bool isMicro, bool isDelayed,
+                bool isFirst, bool isLast,
+                RegIndex _src1, RegIndex _dest,
+                uint8_t _dataSize, uint16_t _ext,
+                OpClass __opClass) :
+            X86MicroopBase(_machInst, mnem, _instMnem,
+                    isMicro, isDelayed, isFirst, isLast,
+                    __opClass),
+            src1(_src1), dest(_dest),
+            dataSize(_dataSize), ext(_ext)
+        {
+        }
+
+        //Figure out what the condition code flags should be.
+        uint64_t genFlags(uint64_t oldFlags, uint64_t flagMask,
+                uint64_t _dest, uint64_t _src1, uint64_t _src2,
+                bool subtract = false) const;
+        bool checkCondition(uint64_t flags) const;
+    };
+
+    class RegOp : public RegOpBase
+    {
+      protected:
+        const RegIndex src2;
+
+        // Constructor
+        RegOp(ExtMachInst _machInst,
+                const char *mnem, const char *_instMnem,
+                bool isMicro, bool isDelayed,
+                bool isFirst, bool isLast,
+                RegIndex _src1, RegIndex _src2, RegIndex _dest,
+                uint8_t _dataSize, uint16_t _ext,
+                OpClass __opClass) :
+            RegOpBase(_machInst, mnem, _instMnem,
+                    isMicro, isDelayed, isFirst, isLast,
+                    _src1, _dest, _dataSize, _ext,
+                    __opClass),
+            src2(_src2)
+        {
+        }
+
+        std::string generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const;
+    };
+
+    class RegOpImm : public RegOpBase
+    {
+      protected:
+        const uint8_t imm8;
+
+        // Constructor
+        RegOpImm(ExtMachInst _machInst,
+                const char * mnem, const char *_instMnem,
+                bool isMicro, bool isDelayed,
+                bool isFirst, bool isLast,
+                RegIndex _src1, uint8_t _imm8, RegIndex _dest,
+                uint8_t _dataSize, uint16_t _ext,
+                OpClass __opClass) :
+            RegOpBase(_machInst, mnem, _instMnem,
+                    isMicro, isDelayed, isFirst, isLast,
+                    _src1, _dest, _dataSize, _ext,
+                    __opClass),
+            imm8(_imm8)
+        {
+        }
+
+        std::string generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const;
+    };
+}
+
+#endif //__ARCH_X86_INSTS_MICROREGOP_HH__
diff --git a/src/arch/x86/insts/static_inst.cc b/src/arch/x86/insts/static_inst.cc
new file mode 100644
index 000000000..9b2f81e49
--- /dev/null
+++ b/src/arch/x86/insts/static_inst.cc
@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#include "arch/x86/insts/static_inst.hh"
+
+namespace X86ISA
+{
+    void X86StaticInst::printMnemonic(std::ostream &os,
+            const char * mnemonic) const
+    {
+        ccprintf(os, "\t%s   ", mnemonic);
+    }
+
+    void X86StaticInst::printMnemonic(std::ostream &os,
+            const char * instMnemonic, const char * mnemonic) const
+    {
+        ccprintf(os, "\t%s : %s   ", instMnemonic, mnemonic);
+    }
+
+    void X86StaticInst::printSegment(std::ostream &os, int segment) const
+    {
+        switch (segment)
+        {
+          case 0:
+            ccprintf(os, "ES");
+            break;
+          case 1:
+            ccprintf(os, "CS");
+            break;
+          case 2:
+            ccprintf(os, "SS");
+            break;
+          case 3:
+            ccprintf(os, "DS");
+            break;
+          case 4:
+            ccprintf(os, "FS");
+            break;
+          case 5:
+            ccprintf(os, "GS");
+            break;
+          default:
+            panic("Unrecognized segment %d\n", segment);
+        }
+    }
+
+    void
+    X86StaticInst::printSrcReg(std::ostream &os, int reg, int size) const
+    {
+        if(_numSrcRegs > reg)
+            printReg(os, _srcRegIdx[reg], size);
+    }
+
+    void
+    X86StaticInst::printDestReg(std::ostream &os, int reg, int size) const
+    {
+        if(_numDestRegs > reg)
+            printReg(os, _destRegIdx[reg], size);
+    }
+
+    void
+    X86StaticInst::printReg(std::ostream &os, int reg, int size) const
+    {
+        assert(size == 1 || size == 2 || size == 4 || size == 8);
+        static const char * abcdFormats[9] =
+            {"", "%sl",  "%sx",  "", "e%sx", "", "", "", "r%sx"};
+        static const char * piFormats[9] =
+            {"", "%sl",  "%s",   "", "e%s",  "", "", "", "r%s"};
+        static const char * longFormats[9] =
+            {"", "r%sb", "r%sw", "", "r%sd", "", "", "", "r%s"};
+        static const char * microFormats[9] =
+            {"", "t%db", "t%dw", "", "t%dd", "", "", "", "t%d"};
+
+        if (reg < FP_Base_DepTag) {
+            switch (reg) {
+              case INTREG_RAX:
+                ccprintf(os, abcdFormats[size], "a");
+                break;
+              case INTREG_RBX:
+                ccprintf(os, abcdFormats[size], "b");
+                break;
+              case INTREG_RCX:
+                ccprintf(os, abcdFormats[size], "c");
+                break;
+              case INTREG_RDX:
+                ccprintf(os, abcdFormats[size], "d");
+                break;
+              case INTREG_RSP:
+                ccprintf(os, piFormats[size], "sp");
+                break;
+              case INTREG_RBP:
+                ccprintf(os, piFormats[size], "bp");
+                break;
+              case INTREG_RSI:
+                ccprintf(os, piFormats[size], "si");
+                break;
+              case INTREG_RDI:
+                ccprintf(os, piFormats[size], "di");
+                break;
+              case INTREG_R8W:
+                ccprintf(os, longFormats[size], "8");
+                break;
+              case INTREG_R9W:
+                ccprintf(os, longFormats[size], "9");
+                break;
+              case INTREG_R10W:
+                ccprintf(os, longFormats[size], "10");
+                break;
+              case INTREG_R11W:
+                ccprintf(os, longFormats[size], "11");
+                break;
+              case INTREG_R12W:
+                ccprintf(os, longFormats[size], "12");
+                break;
+              case INTREG_R13W:
+                ccprintf(os, longFormats[size], "13");
+                break;
+              case INTREG_R14W:
+                ccprintf(os, longFormats[size], "14");
+                break;
+              case INTREG_R15W:
+                ccprintf(os, longFormats[size], "15");
+                break;
+              default:
+                ccprintf(os, microFormats[size], reg - NUM_INTREGS);
+            }
+        } else if (reg < Ctrl_Base_DepTag) {
+            ccprintf(os, "%%f%d", reg - FP_Base_DepTag);
+        } else {
+            switch (reg - Ctrl_Base_DepTag) {
+              default:
+                ccprintf(os, "%%ctrl%d", reg - Ctrl_Base_DepTag);
+            }
+        }
+    }
+
+    std::string X86StaticInst::generateDisassembly(Addr pc,
+        const SymbolTable *symtab) const
+    {
+        std::stringstream ss;
+
+        printMnemonic(ss, mnemonic);
+
+        return ss.str();
+    }
+}
diff --git a/src/arch/x86/insts/static_inst.hh b/src/arch/x86/insts/static_inst.hh
new file mode 100644
index 000000000..c39c2956e
--- /dev/null
+++ b/src/arch/x86/insts/static_inst.hh
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_X86_INSTS_STATICINST_HH__
+#define __ARCH_X86_INSTS_STATICINST_HH__
+
+#include "cpu/static_inst.hh"
+
+namespace X86ISA
+{
+    /**
+     * Base class for all X86 static instructions.
+     */
+
+    class X86StaticInst : public StaticInst
+    {
+      protected:
+        // Constructor.
+        X86StaticInst(const char *mnem,
+             ExtMachInst _machInst, OpClass __opClass)
+                : StaticInst(mnem, _machInst, __opClass)
+            {
+            }
+
+        std::string generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const;
+
+        void printMnemonic(std::ostream &os, const char * mnemonic) const;
+        void printMnemonic(std::ostream &os, const char * instMnemonic,
+                const char * mnemonic) const;
+
+        void printSegment(std::ostream &os, int segment) const;
+
+        void printReg(std::ostream &os, int reg, int size) const;
+        void printSrcReg(std::ostream &os, int reg, int size) const;
+        void printDestReg(std::ostream &os, int reg, int size) const;
+
+        inline uint64_t merge(uint64_t into, uint64_t val, int size) const
+        {
+            X86IntReg reg;
+            reg = into;
+            //FIXME This needs to be handle high bytes as well
+            switch(size)
+            {
+              case 1:
+                reg.L = val;
+                break;
+              case 2:
+                reg.X = val;
+                break;
+              case 4:
+                //XXX Check if this should be zeroed or sign extended
+                reg = 0;
+                reg.E = val;
+                break;
+              case 8:
+                reg.R = val;
+                break;
+              default:
+                panic("Tried to merge with unrecognized size %d.\n", size);
+            }
+            return val;
+        }
+
+        inline uint64_t pick(uint64_t from, int size)
+        {
+            X86IntReg reg;
+            reg = from;
+            switch(size)
+            {
+              case 1:
+                return reg.L;
+              case 2:
+                return reg.E;
+              case 4:
+                return reg.X;
+              case 8:
+                return reg.R;
+              default:
+                panic("Tried to pick with unrecognized size %d.\n", size);
+            }
+        }
+    };
+}
+
+#endif //__ARCH_X86_INSTS_STATICINST_HH__
diff --git a/src/arch/x86/intregfile.hh b/src/arch/x86/intregfile.hh
index f7b03f0f0..be6242a41 100644
--- a/src/arch/x86/intregfile.hh
+++ b/src/arch/x86/intregfile.hh
@@ -104,7 +104,8 @@ namespace X86ISA
     std::string getIntRegName(RegIndex);
 
     const int NumIntArchRegs = NUM_INTREGS;
-    const int NumIntRegs = NumIntArchRegs + NumMicroIntRegs;
+    const int NumIntRegs =
+        NumIntArchRegs + NumMicroIntRegs + NumPseudoIntRegs;
 
     class IntRegFile
     {
diff --git a/src/arch/x86/intregs.hh b/src/arch/x86/intregs.hh
index 1b5777f01..bfec7d041 100644
--- a/src/arch/x86/intregs.hh
+++ b/src/arch/x86/intregs.hh
@@ -58,8 +58,18 @@
 #ifndef __ARCH_X86_INTREGS_HH__
 #define __ARCH_X86_INTREGS_HH__
 
+#include "base/bitunion.hh"
+
 namespace X86ISA
 {
+    BitUnion64(X86IntReg)
+        Bitfield<63,0> R;
+        Bitfield<31,0> E;
+        Bitfield<15,0> X;
+        Bitfield<15,8> H;
+        Bitfield<7, 0> L;
+    EndBitUnion(X86IntReg)
+
     enum IntRegIndex
     {
         INTREG_RAX,
diff --git a/src/arch/x86/isa/base.isa b/src/arch/x86/isa/base.isa
deleted file mode 100644
index eed969b47..000000000
--- a/src/arch/x86/isa/base.isa
+++ /dev/null
@@ -1,303 +0,0 @@
-// Copyright (c) 2007 The Hewlett-Packard Development Company
-// All rights reserved.
-//
-// Redistribution and use of this software in source and binary forms,
-// with or without modification, are permitted provided that the
-// following conditions are met:
-//
-// The software must be used only for Non-Commercial Use which means any
-// use which is NOT directed to receiving any direct monetary
-// compensation for, or commercial advantage from such use.  Illustrative
-// examples of non-commercial use are academic research, personal study,
-// teaching, education and corporate research & development.
-// Illustrative examples of commercial use are distributing products for
-// commercial advantage and providing services using the software for
-// commercial advantage.
-//
-// If you wish to use this software or functionality therein that may be
-// covered by patents for commercial use, please contact:
-//     Director of Intellectual Property Licensing
-//     Office of Strategy and Technology
-//     Hewlett-Packard Company
-//     1501 Page Mill Road
-//     Palo Alto, California  94304
-//
-// Redistributions of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.  Redistributions
-// in binary form must reproduce the above copyright notice, this list of
-// conditions and the following disclaimer in the documentation and/or
-// other materials provided with the distribution.  Neither the name of
-// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.  No right of
-// sublicense is granted herewith.  Derivatives of the software and
-// output created using the software may be prepared, but only for
-// Non-Commercial Uses.  Derivatives of the software may be shared with
-// others provided: (i) the others agree to abide by the list of
-// conditions herein which includes the Non-Commercial Use restrictions;
-// and (ii) such Derivatives of the software include the above copyright
-// notice to acknowledge the contribution from this software where
-// applicable, this list of conditions and the disclaimer below.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Authors: Gabe Black
-
-////////////////////////////////////////////////////////////////////
-//
-// Base class for sparc instructions, and some support functions
-//
-
-let {{
-    # This class will help make dealing with output a little less verbose
-    class OutputBlocks(object):
-        def __init__(self, header_output="",
-                           decoder_output="",
-                           decode_block="",
-                           exec_output=""):
-            self.header_output = header_output
-            self.decoder_output = decoder_output
-            self.decode_block = decode_block
-            self.exec_output = exec_output
-
-        def append(self, blocks):
-            if isinstance(blocks, list) or isinstance(blocks, tuple):
-                assert(len(blocks) == 4)
-                self.header_output += blocks[0]
-                self.decoder_output += blocks[1]
-                self.decode_block += blocks[2]
-                self.exec_output += blocks[3]
-            else:
-                self.header_output += blocks.header_output
-                self.decoder_output += blocks.decoder_output
-                self.decode_block += blocks.decode_block
-                self.exec_output += blocks.exec_output
-
-        def makeList(self):
-            return (self.header_output,
-                    self.decoder_output,
-                    self.decode_block,
-                    self.exec_output)
-}};
-
-output header {{
-
-        /**
-         * Base class for all X86 static instructions.
-         */
-        BitUnion64(X86IntReg)
-            Bitfield<63,0> R;
-            Bitfield<31,0> E;
-            Bitfield<15,0> X;
-            Bitfield<15,8> H;
-            Bitfield<7, 0> L;
-        EndBitUnion(X86IntReg)
-
-        class X86StaticInst : public StaticInst
-        {
-          protected:
-            // Constructor.
-            X86StaticInst(const char *mnem,
-                 ExtMachInst _machInst, OpClass __opClass)
-                    : StaticInst(mnem, _machInst, __opClass)
-                {
-                }
-
-            std::string generateDisassembly(Addr pc,
-                const SymbolTable *symtab) const;
-
-            void printReg(std::ostream &os, int reg) const;
-            void printSrcReg(std::ostream &os, int reg) const;
-            void printDestReg(std::ostream &os, int reg) const;
-
-            inline uint64_t merge(uint64_t into, uint64_t val, int size) const
-            {
-                X86IntReg reg;
-                reg = into;
-                //FIXME This needs to be handle high bytes as well
-                switch(size)
-                {
-                  case 1:
-                    reg.L = val;
-                    break;
-                  case 2:
-                    reg.X = val;
-                    break;
-                  case 4:
-                    //XXX Check if this should be zeroed or sign extended
-                    reg = 0;
-                    reg.E = val;
-                    break;
-                  case 8:
-                    reg.R = val;
-                    break;
-                  default:
-                    panic("Tried to merge with unrecognized size %d.\n", size);
-                }
-                return val;
-            }
-
-            inline uint64_t pick(uint64_t from, int size)
-            {
-                X86IntReg reg;
-                reg = from;
-                switch(size)
-                {
-                  case 1:
-                    return reg.L;
-                  case 2:
-                    return reg.E;
-                  case 4:
-                    return reg.X;
-                  case 8:
-                    return reg.R;
-                  default:
-                    panic("Tried to pick with unrecognized size %d.\n", size);
-                }
-            }
-
-        };
-}};
-
-output decoder {{
-
-        inline void printMnemonic(std::ostream &os, const char * mnemonic)
-        {
-            ccprintf(os, "\t%s   ", mnemonic);
-        }
-
-        inline void printMnemonic(std::ostream &os,
-                const char * instMnemonic, const char * mnemonic)
-        {
-            ccprintf(os, "\t%s : %s   ", instMnemonic, mnemonic);
-        }
-
-        void printSegment(std::ostream &os, int segment)
-        {
-            switch (segment)
-            {
-              case 0:
-                ccprintf(os, "ES");
-                break;
-              case 1:
-                ccprintf(os, "CS");
-                break;
-              case 2:
-                ccprintf(os, "SS");
-                break;
-              case 3:
-                ccprintf(os, "DS");
-                break;
-              case 4:
-                ccprintf(os, "FS");
-                break;
-              case 5:
-                ccprintf(os, "GS");
-                break;
-              default:
-                panic("Unrecognized segment %d\n", segment);
-            }
-        }
-
-        void
-        X86StaticInst::printSrcReg(std::ostream &os, int reg) const
-        {
-            if(_numSrcRegs > reg)
-                printReg(os, _srcRegIdx[reg]);
-        }
-
-        void
-        X86StaticInst::printDestReg(std::ostream &os, int reg) const
-        {
-            if(_numDestRegs > reg)
-                printReg(os, _destRegIdx[reg]);
-        }
-
-        void
-        X86StaticInst::printReg(std::ostream &os, int reg) const
-        {
-            if (reg < FP_Base_DepTag) {
-                //FIXME These should print differently depending on the
-                //mode etc, but for now this will get the point across
-                switch (reg) {
-                  case INTREG_RAX:
-                    ccprintf(os, "rax");
-                    break;
-                  case INTREG_RBX:
-                    ccprintf(os, "rbx");
-                    break;
-                  case INTREG_RCX:
-                    ccprintf(os, "rcx");
-                    break;
-                  case INTREG_RDX:
-                    ccprintf(os, "rdx");
-                    break;
-                  case INTREG_RSP:
-                    ccprintf(os, "rsp");
-                    break;
-                  case INTREG_RBP:
-                    ccprintf(os, "rbp");
-                    break;
-                  case INTREG_RSI:
-                    ccprintf(os, "rsi");
-                    break;
-                  case INTREG_RDI:
-                    ccprintf(os, "rdi");
-                    break;
-                  case INTREG_R8W:
-                    ccprintf(os, "r8");
-                    break;
-                  case INTREG_R9W:
-                    ccprintf(os, "r9");
-                    break;
-                  case INTREG_R10W:
-                    ccprintf(os, "r10");
-                    break;
-                  case INTREG_R11W:
-                    ccprintf(os, "r11");
-                    break;
-                  case INTREG_R12W:
-                    ccprintf(os, "r12");
-                    break;
-                  case INTREG_R13W:
-                    ccprintf(os, "r13");
-                    break;
-                  case INTREG_R14W:
-                    ccprintf(os, "r14");
-                    break;
-                  case INTREG_R15W:
-                    ccprintf(os, "r15");
-                    break;
-                  default:
-                    ccprintf(os, "t%d", reg - NUM_INTREGS);
-                }
-            } else if (reg < Ctrl_Base_DepTag) {
-                ccprintf(os, "%%f%d", reg - FP_Base_DepTag);
-            } else {
-                switch (reg - Ctrl_Base_DepTag) {
-                  default:
-                    ccprintf(os, "%%ctrl%d", reg - Ctrl_Base_DepTag);
-                }
-            }
-        }
-
-        std::string X86StaticInst::generateDisassembly(Addr pc,
-            const SymbolTable *symtab) const
-        {
-            std::stringstream ss;
-
-            printMnemonic(ss, mnemonic);
-
-            return ss.str();
-        }
-}};
diff --git a/src/arch/x86/isa/bitfields.isa b/src/arch/x86/isa/bitfields.isa
index 8707bbb4c..43fee5fef 100644
--- a/src/arch/x86/isa/bitfields.isa
+++ b/src/arch/x86/isa/bitfields.isa
@@ -67,11 +67,12 @@ def bitfield REX_B rex.b;
 
 //Legacy prefixes
 def bitfield LEGACY legacy;
+def bitfield LEGACY_DECODEVAL legacy.decodeVal;
 def bitfield LEGACY_REPNE legacy.repne;
 def bitfield LEGACY_REP legacy.rep;
 def bitfield LEGACY_LOCK legacy.lock;
-def bitfield LEGACY_ADDR legacy.addr;
 def bitfield LEGACY_OP legacy.op;
+def bitfield LEGACY_ADDR legacy.addr;
 def bitfield LEGACY_SEG legacy.seg;
 
 // Pieces of the opcode
diff --git a/src/arch/x86/isa/decoder/one_byte_opcodes.isa b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
index 484f8160d..b28f2029c 100644
--- a/src/arch/x86/isa/decoder/one_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/one_byte_opcodes.isa
@@ -61,178 +61,130 @@
 0x1: decode OPCODE_OP_TOP5 {
     format WarnUnimpl {
         0x00: decode OPCODE_OP_BOTTOM3 {
-            0x4: ADD();
-            0x5: ADD();
             0x6: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: push_ES();
             }
             0x7: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: pop_ES();
             }
-            default: ADD();
+            default: MultiInst::ADD(OPCODE_OP_BOTTOM3,
+                                    [Eb,Gb], [Ev,Gv],
+                                    [Gb,Eb], [Gv,Ev],
+                                    [rAl,Ib], [rAx,Iz]);
         }
         0x01: decode OPCODE_OP_BOTTOM3 {
-            0x0: or_Eb_Gb();
-            0x1: or_Ev_Gv();
-            0x2: or_Gb_Eb();
-            0x3: or_Gv_Ev();
-            0x4: or_Al_Ib();
-            0x5: or_rAX_Iz();
             0x6: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: push_CS();
             }
             //Any time this is seen, it should generate a two byte opcode
             0x7: M5InternalError::error(
                 {{"Saw a one byte opcode whose value was 0x0F!"}});
+            default: MultiInst::OR(OPCODE_OP_BOTTOM3,
+                                   [Eb,Gb], [Ev,Gv],
+                                   [Gb,Eb], [Gv,Ev],
+                                   [rAl,Ib], [rAx,Iz]);
         }
         0x02: decode OPCODE_OP_BOTTOM3 {
-            0x0: adc_Eb_Gb();
-            0x1: adc_Ev_Gv();
-            0x2: adc_Gb_Eb();
-            0x3: adc_Gv_Ev();
-            0x4: adc_Al_Ib();
-            0x5: adc_rAX_Iz();
             0x6: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: push_SS();
             }
             0x7: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: pop_SS();
             }
+            default: MultiInst::ADC(OPCODE_OP_BOTTOM3,
+                                    [Eb,Gb], [Ev,Gv],
+                                    [Gb,Eb], [Gv,Ev],
+                                    [rAl,Ib], [rAx,Iz]);
         }
         0x03: decode OPCODE_OP_BOTTOM3 {
-            0x0: sbb_Eb_Gb();
-            0x1: sbb_Ev_Gv();
-            0x2: sbb_Gb_Eb();
-            0x3: sbb_Gv_Ev();
-            0x4: sbb_Al_Ib();
-            0x5: sbb_rAX_Iz();
             0x6: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: push_DS();
             }
             0x7: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: pop_DS();
             }
+            default: MultiInst::SBB(OPCODE_OP_BOTTOM3,
+                                    [Eb,Gb], [Ev,Gv],
+                                    [Gb,Eb], [Gv,Ev],
+                                    [rAl,Ib], [rAx,Iz]);
         }
         0x04: decode OPCODE_OP_BOTTOM3 {
-            0x0: and_Eb_Gb();
-            0x1: and_Ev_Gv();
-            0x2: and_Gb_Eb();
-            0x3: and_Gv_Ev();
-            0x4: and_Al_Ib();
-            0x5: and_rAX_Iz();
             0x6: M5InternalError::error(
                 {{"Tried to execute the ES segment override prefix!"}});
             0x7: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: daa();
             }
+            default: MultiInst::AND(OPCODE_OP_BOTTOM3,
+                                    [Eb,Gb], [Ev,Gv],
+                                    [Gb,Eb], [Gv,Ev],
+                                    [rAl,Ib], [rAx,Iz]);
         }
         0x05: decode OPCODE_OP_BOTTOM3 {
-            0x0: sub_Eb_Gb();
-            0x1: sub_Ev_Gv();
-            0x2: sub_Gb_Eb();
-            0x3: sub_Gv_Ev();
-            0x4: sub_Al_Ib();
-            0x5: sub_rAX_Iz();
             0x6: M5InternalError::error(
                 {{"Tried to execute the CS segment override prefix!"}});
             0x7: das();
+            default: MultiInst::SUB(OPCODE_OP_BOTTOM3,
+                                    [Eb,Gb], [Ev,Gv],
+                                    [Gb,Eb], [Gv,Ev],
+                                    [rAl,Ib], [rAx,Iz]);
         }
         0x06: decode OPCODE_OP_BOTTOM3 {
-            0x4: Inst::XOR(rAl,Ib);
-            0x5: Inst::XOR(rAx,Iz);
             0x6: M5InternalError::error(
                 {{"Tried to execute the SS segment override prefix!"}});
             0x7: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: aaa();
             }
             default: MultiInst::XOR(OPCODE_OP_BOTTOM3,
                                     [Eb,Gb], [Ev,Gv],
-                                    [Gb,Eb], [Gv,Ev]);
+                                    [Gb,Eb], [Gv,Ev],
+                                    [rAl,Ib], [rAx,Iz]);
         }
         0x07: decode OPCODE_OP_BOTTOM3 {
-            0x0: cmp_Eb_Gb();
-            0x1: cmp_Ev_Gv();
-            0x2: cmp_Gb_Eb();
-            0x3: cmp_Gv_Ev();
-            0x4: cmp_Al_Ib();
-            0x5: cmp_rAX_Iz();
             0x6: M5InternalError::error(
                 {{"Tried to execute the DS segment override prefix!"}});
             0x7: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: aas();
             }
+            default: MultiInst::CMP(OPCODE_OP_BOTTOM3,
+                                    [Eb,Gb], [Ev,Gv],
+                                    [Gb,Eb], [Gv,Ev],
+                                    [rAl,Ib], [rAx,Iz]);
         }
         0x08: decode MODE_SUBMODE {
             0x0: M5InternalError::error (
                 {{"Tried to execute an REX prefix!"}});
-            default: decode OPCODE_OP_BOTTOM3 {
-                0x0: inc_eAX();
-                0x1: inc_eCX();
-                0x2: inc_eDX();
-                0x3: inc_eBX();
-                0x4: inc_eSP();
-                0x5: inc_eBP();
-                0x6: inc_eSI();
-                0x7: inc_eDI();
-            }
+            default: Inst::INC(B);
         }
         0x09: decode MODE_SUBMODE {
             0x0: M5InternalError::error (
                 {{"Tried to execute an REX prefix!"}});
-            default: decode OPCODE_OP_BOTTOM3 {
-                0x0: dec_eAX();
-                0x1: dec_eCX();
-                0x2: dec_eDX();
-                0x3: dec_eBX();
-                0x4: dec_eSP();
-                0x5: dec_eBP();
-                0x6: dec_eSI();
-                0x7: dec_eDI();
-            }
+            default: Inst::DEC(B);
         }
         format Inst {
-            0x0A: decode OPCODE_OP_BOTTOM3 {
-                0x0: PUSH(rAx);
-                0x1: PUSH(rCx);
-                0x2: PUSH(rDx);
-                0x3: PUSH(rBx);
-                0x4: PUSH(rSP);
-                0x5: PUSH(rBP);
-                0x6: PUSH(rSI);
-                0x7: PUSH(rDI);
-            }
-            0x0B: decode OPCODE_OP_BOTTOM3 {
-                0x0: POP(rAx);
-                0x1: POP(rCx);
-                0x2: POP(rDx);
-                0x3: POP(rBx);
-                0x4: POP(rSP);
-                0x5: POP(rBP);
-                0x6: POP(rSI);
-                0x7: POP(rDI);
-            }
+            0x0A: PUSH(B);
+            0x0B: POP(B);
         }
         0x0C: decode OPCODE_OP_BOTTOM3 {
             0x0: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: pusha();
             }
             0x1: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: popa();
             }
             0x2: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: bound_Gv_Ma();
             }
             0x3: decode MODE_SUBMODE {
@@ -258,58 +210,82 @@
             0x6: outs_Dx_Xb();
             0x7: outs_Dx_Xz();
         }
-        0x0E: decode OPCODE_OP_BOTTOM3 {
-            0x0: jo_Jb();
-            0x1: jno_Jb();
-            0x2: jb_Jb();
-            0x3: jnb_Jb();
-            0x4: jz_Jb();
-            0x5: jnz_Jb();
-            0x6: jbe_Jb();
-            0x7: jnbe_Jb();
-        }
-        0x0F: decode OPCODE_OP_BOTTOM3 {
-            0x0: js_Jb();
-            0x1: jns_Jb();
-            0x2: jp_Jb();
-            0x3: jnp_Jb();
-            0x4: jl_Jb();
-            0x5: jnl_Jb();
-            0x6: jle_Jb();
-            0x7: jnke_Jb();
-        }
-        0x10: decode OPCODE_OP_BOTTOM3 {
-            0x0: group1_Eb_Ib();
-            //0x1: group1_Ev_Iz();
-            0x1: decode MODRM_REG {
-                0x0: add_Ev_Iz();
-                0x1: or_Ev_Ibz();
-                0x2: adc_Ev_Iz();
-                0x3: sbb_Ev_Iz();
-                0x4: Inst::AND(Ev,Iz);
-                0x5: Inst::SUB(Ev,Iz);
-                0x6: xor_Ev_Iz();
-                0x7: cmp_Ev_Iz();
-            }
-            0x2: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
-                default: group1_Eb_Ib();
+        format Inst {
+            0x0E: decode OPCODE_OP_BOTTOM3 {
+                0x0: JO(Jb);
+                0x1: JNO(Jb);
+                0x2: JB(Jb);
+                0x3: JNB(Jb);
+                0x4: JZ(Jb);
+                0x5: JNZ(Jb);
+                0x6: JBE(Jb);
+                0x7: JNBE(Jb);
+            }
+            0x0F: decode OPCODE_OP_BOTTOM3 {
+                0x0: JS(Jb);
+                0x1: JNS(Jb);
+                0x2: JP(Jb);
+                0x3: JNP(Jb);
+                0x4: JL(Jb);
+                0x5: JNL(Jb);
+                0x6: JLE(Jb);
+                0x7: JNLE(Jb);
             }
-            //0x3: group1_Ev_Ib();
-            0x3: decode MODRM_REG {
-                0x0: add_Eb_Ib();
-                0x1: or_Eb_Ib();
-                0x2: adc_Eb_Ib();
-                0x3: sbb_Eb_Ib();
-                0x4: Inst::AND(Eb,Ib);
-                0x5: sub_Eb_Ib();
-                0x6: xor_Eb_Ib();
-                0x7: cmp_Eb_Ib();
+        }
+        format Inst {
+            0x10: decode OPCODE_OP_BOTTOM3 {
+                //0x0: group1_Eb_Ib();
+                0x0: decode MODRM_REG {
+                    0x0: ADD(Eb,Ib);
+                    0x1: OR(Eb,Ib);
+                    0x2: ADC(Eb,Ib);
+                    0x3: SBB(Eb,Ib);
+                    0x4: AND(Eb,Ib);
+                    0x5: SUB(Eb,Ib);
+                    0x6: XOR(Eb,Ib);
+                    0x7: CMP(Eb,Ib);
+                }
+                //0x1: group1_Ev_Iz();
+                0x1: decode MODRM_REG {
+                    0x0: ADD(Ev,Iz);
+                    0x1: OR(Ev,Iz);
+                    0x2: ADC(Ev,Iz);
+                    0x3: SBB(Ev,Iz);
+                    0x4: AND(Ev,Iz);
+                    0x5: SUB(Ev,Iz);
+                    0x6: XOR(Ev,Iz);
+                    0x7: CMP(Ev,Iz);
+                }
+                0x2: decode MODE_SUBMODE {
+                    0x0: UD2();
+                    //default: group1_Eb_Ib();
+                    default: decode MODRM_REG {
+                        0x0: ADD(Eb,Ib);
+                        0x1: OR(Eb,Ib);
+                        0x2: ADC(Eb,Ib);
+                        0x3: SBB(Eb,Ib);
+                        0x4: AND(Eb,Ib);
+                        0x5: SUB(Eb,Ib);
+                        0x6: XOR(Eb,Ib);
+                        0x7: CMP(Eb,Ib);
+                    }
+                }
+                //0x3: group1_Ev_Ib();
+                0x3: decode MODRM_REG {
+                    0x0: ADD(Ev,Ib);
+                    0x1: OR(Ev,Ib);
+                    0x2: ADC(Ev,Ib);
+                    0x3: SBB(Ev,Ib);
+                    0x4: AND(Ev,Ib);
+                    0x5: SUB(Ev,Ib);
+                    0x6: XOR(Ev,Ib);
+                    0x7: CMP(Ev,Ib);
+                }
+                0x4: TEST(Eb,Gb);
+                0x5: TEST(Ev,Gv);
+                0x6: XCHG(Eb,Gb);
+                0x7: XCHG(Ev,Gv);
             }
-            0x4: Inst::TEST(Eb,Gb);
-            0x5: Inst::TEST(Ev,Gv);
-            0x6: xchg_Eb_Gb();
-            0x7: xchg_Ev_Gv();
         }
         0x11: decode OPCODE_OP_BOTTOM3 {
             0x0: Inst::MOV(Eb,Gb);
@@ -322,21 +298,15 @@
             0x7: group10_Ev(); //Make sure this is Ev
         }
         0x12: decode OPCODE_OP_BOTTOM3 {
-            default: nop_or_pause(); //Check for repe prefix
-            0x1: xchg_rCX_rAX();
-            0x2: xchg_rDX_rAX();
-            0x3: xchg_rVX_rAX();
-            0x4: xchg_rSP_rAX();
-            0x5: xchg_rBP_rAX();
-            0x6: xchg_rSI_rAX();
-            0x7: xchg_rDI_rAX();
+            0x0: Inst::NOP(); //XXX repe makes this a "pause"
+            default: xchg_B_rAX();
         }
         0x13: decode OPCODE_OP_BOTTOM3 {
             0x0: cbw_or_cwde_or_cdqe_rAX();
             0x1: cwd_or_cdq_or_cqo_rAX_rDX();
             0x2: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
-                default: call_Ap();
+                0x0: Inst::UD2();
+                default: call_far_Ap();
             }
             0x3: fwait(); //aka wait
             0x4: pushf_Fv();
@@ -344,11 +314,11 @@
             //Both of these should be illegal only if CPUID.AHF64=0,
             //according to sandpile.org
             0x6: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: sahf();
             }
             0x7: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: lahf();
             }
         }
@@ -372,48 +342,52 @@
             0x6: scas_Yb_Al();
             0x7: scas_Yv_rAX();
         }
-        0x16: decode OPCODE_OP_BOTTOM3 {
-            0x0: mov_Al_Ib();
-            0x1: mov_Cl_Ib();
-            0x2: mov_Dl_Ib();
-            0x3: mov_Bl_Ib();
-            0x4: mov_Ah_Ib();
-            0x5: mov_Ch_Ib();
-            0x6: mov_Dh_Ib();
-            0x7: mov_Bh_Ib();
-        }
         format Inst {
-            0x17: decode OPCODE_OP_BOTTOM3 {
-                0x0: MOV(rAX,Iv);
-                0x1: MOV(rCX,Iv);
-                0x2: MOV(rDX,Iv);
-                0x3: MOV(rBX,Iv);
-                0x4: MOV(rSP,Iv);
-                0x5: MOV(rBP,Iv);
-                0x6: MOV(rSI,Iv);
-                0x7: MOV(rDI,Iv);
-            }
-        }
-        0x18: decode OPCODE_OP_BOTTOM3 {
-            0x0: group2_Eb_Ib();
-            0x1: group2_Ev_Ib();
-            0x2: ret_near_Iw();
-            0x3: ret_near();
-            0x4: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
-                default: les_Gz_Mp();
-            }
-            0x5: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
-                default: lds_Gz_Mp();
-            }
-            //0x6: group12_Eb_Ib();
-            0x6: decode MODRM_REG {
-                0x0: Inst::MOV(Eb,Ib);
-            }
-            //0x7: group12_Ev_Iz();
-            0x7: decode MODRM_REG {
-                0x0: Inst::MOV(Ev,Iz);
+            0x16: MOV(B,Ib);
+            0x17: MOV(B,Iv);
+            0x18: decode OPCODE_OP_BOTTOM3 {
+                //0x0: group2_Eb_Ib();
+                0x0: decode MODRM_REG {
+                    0x0: ROL(Eb,Ib);
+                    0x1: ROR(Eb,Ib);
+                    0x2: RCL(Eb,Ib);
+                    0x3: RCR(Eb,Ib);
+                    0x4: SAL(Eb,Ib);
+                    0x5: SHR(Eb,Ib);
+                    0x6: SAL(Eb,Ib);
+                    0x7: SAR(Eb,Ib);
+                }
+                //0x1: group2_Ev_Ib();
+                0x1: decode MODRM_REG {
+                    0x0: ROL(Ev,Ib);
+                    0x1: ROR(Ev,Ib);
+                    0x2: RCL(Ev,Ib);
+                    0x3: RCR(Ev,Ib);
+                    0x4: SAL(Ev,Ib);
+                    0x5: SHR(Ev,Ib);
+                    0x6: SAL(Ev,Ib);
+                    0x7: SAR(Ev,Ib);
+                }
+                0x2: RET_NEAR(Iw);
+                0x3: RET_NEAR();
+                0x4: decode MODE_SUBMODE {
+                    0x0: UD2();
+                    default: WarnUnimpl::les_Gz_Mp();
+                }
+                0x5: decode MODE_SUBMODE {
+                    0x0: UD2();
+                    default: WarnUnimpl::lds_Gz_Mp();
+                }
+                //0x6: group12_Eb_Ib();
+                0x6: decode MODRM_REG {
+                    0x0: MOV(Eb,Ib);
+                    default: UD2();
+                }
+                //0x7: group12_Ev_Iz();
+                0x7: decode MODRM_REG {
+                    0x0: MOV(Ev,Iz);
+                    default: UD2();
+                }
             }
         }
         0x19: decode OPCODE_OP_BOTTOM3 {
@@ -424,7 +398,7 @@
             0x4: int3();
             0x5: int_Ib();
             0x6: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: into();
             }
             0x7: iret();
@@ -435,15 +409,15 @@
             0x2: group2_Eb_Cl();
             0x3: group2_Ev_Cl();
             0x4: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: aam_Ib();
             }
             0x5: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: aad_Ib();
             }
             0x6: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
+                0x0: Inst::UD2();
                 default: salc();
             }
             0x7: xlat();
@@ -469,13 +443,13 @@
             0x7: out_Ib_eAX();
         }
         0x1D: decode OPCODE_OP_BOTTOM3 {
-            0x0: Inst::CALL(Jz);
-            0x1: jmp_Jz();
+            0x0: Inst::CALL_NEAR(Jz);
+            0x1: Inst::JMP(Jz);
             0x2: decode MODE_SUBMODE {
-                0x0: This_should_be_an_illegal_instruction();
-                default: jmp_Ap();
+                0x0: Inst::UD2();
+                default: jmp_far_Ap();
             }
-            0x3: jmp_Jb();
+            0x3: Inst::JMP(Jb);
             0x4: in_Al_Dx();
             0x5: in_eAX_Dx();
             0x6: out_Dx_Al();
@@ -501,8 +475,25 @@
             0x3: sti();
             0x4: cld();
             0x5: std();
-            0x6: group4();
-            0x7: group5();
+            format Inst {
+                //0x6: group4();
+                0x6: decode MODRM_REG {
+                    0x0: INC(Eb);
+                    0x1: DEC(Eb);
+                    default: UD2();
+                }
+                //0x7: group5();
+                0x7: decode MODRM_REG {
+                    0x0: INC(Ev);
+                    0x1: DEC(Ev);
+                    0x2: CALL_NEAR(Ev);
+                    0x3: WarnUnimpl::call_far_Mp();
+                    0x4: JMP(Ev);
+                    0x5: WarnUnimpl::jmp_far_Mp();
+                    0x6: PUSH(Ev);
+                    0x7: UD2();
+                }
+            }
         }
     }
     default: FailUnimpl::oneByteOps();
diff --git a/src/arch/x86/isa/decoder/two_byte_opcodes.isa b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
index f05c33bdb..e5631d37b 100644
--- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
@@ -58,7 +58,7 @@
 // Decode the two byte opcodes
 //
 0x2: decode OPCODE_PREFIXA {
-    0xF0: decode OPCODE_OP_TOP5 {
+    0x0F: decode OPCODE_OP_TOP5 {
         format WarnUnimpl {
             0x00: decode OPCODE_OP_BOTTOM3 {
                 0x00: group6();
@@ -67,23 +67,25 @@
                 0x03: lsl_Gv_Ew();
                 //sandpile.org doesn't seem to know what this is... ?
                 0x04: loadall_or_reset_or_hang();
-                //sandpile.org says (AMD) after syscall, so I might want to check
-                //if that means amd64 or AMD machines
-                0x05: loadall_or_syscall();
+#if FULL_SYSTEM
+                0x05: syscall();
+#else
+                0x05: SyscallInst::syscall('xc->syscall(rax)');
+#endif
                 0x06: clts();
                 //sandpile.org says (AMD) after sysret, so I might want to check
                 //if that means amd64 or AMD machines
                 0x07: loadall_or_sysret();
             }
             0x01: decode OPCODE_OP_BOTTOM3 {
-                0x0: holderholder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: invd();
+                0x1: wbinvd();
+                0x2: Inst::UD2();
+                0x3: UD2();
+                0x4: Inst::UD2();
+                0x5: threednow();
+                0x6: threednow();
+                0x7: threednow();
             }
             0x02: decode OPCODE_OP_BOTTOM3 {
                 0x0: holder();
@@ -96,14 +98,14 @@
                 0x7: holder();
             }
             0x03: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: group17();
+                0x1: group17();
+                0x2: group17();
+                0x3: group17();
+                0x4: group17();
+                0x5: group17();
+                0x6: group17();
+                0x7: group17();
             }
             0x04: decode OPCODE_OP_BOTTOM3 {
                 0x0: holder();
@@ -126,44 +128,44 @@
                 0x7: holder();
             }
             0x06: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: wrmsr();
+                0x1: rdtsc();
+                0x2: rdmsr();
+                0x3: rdpmc();
+                0x4: sysenter();
+                0x5: sysexit();
+                0x6: Inst::UD2();
+                0x7: getsec();
             }
             0x07: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: three_byte_opcode();
+                0x1: three_byte_opcode();
+                0x2: three_byte_opcode();
+                0x3: three_byte_opcode();
+                0x4: three_byte_opcode();
+                0x5: three_byte_opcode();
+                0x6: three_byte_opcode();
+                0x7: three_byte_opcode();
             }
             0x08: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: cmovo_Gv_Ev();
+                0x1: cmovno_Gv_Ev();
+                0x2: cmovb_Gv_Ev();
+                0x3: cmovnb_Gv_Ev();
+                0x4: cmovz_Gv_Ev();
+                0x5: cmovnz_Gv_Ev();
+                0x6: cmovbe_Gv_Ev();
+                0x7: cmovnbe_Gv_Ev();
             }
             0x09: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: cmovs_Gv_Ev();
+                0x1: cmovns_Gv_Ev();
+                0x2: cmovp_Gv_Ev();
+                0x3: cmovnp_Gv_Ev();
+                0x4: cmovl_Gv_Ev();
+                0x5: cmovnl_Gv_Ev();
+                0x6: cmovle_Gv_Ev();
+                0x7: cmovnle_Gv_Ev();
             }
             0x0A: decode OPCODE_OP_BOTTOM3 {
                 0x0: holder();
@@ -225,85 +227,87 @@
                 0x6: holder();
                 0x7: holder();
             }
-            0x10: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
-            }
-            0x11: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+            format Inst {
+                0x10: decode OPCODE_OP_BOTTOM3 {
+                    0x0: JO(Jz);
+                    0x1: JNO(Jz);
+                    0x2: JB(Jz);
+                    0x3: JNB(Jz);
+                    0x4: JZ(Jz);
+                    0x5: JNZ(Jz);
+                    0x6: JBE(Jz);
+                    0x7: JNBE(Jz);
+                }
+                0x11: decode OPCODE_OP_BOTTOM3 {
+                    0x0: JS(Jz);
+                    0x1: JNS(Jz);
+                    0x2: JP(Jz);
+                    0x3: JNP(Jz);
+                    0x4: JL(Jz);
+                    0x5: JNL(Jz);
+                    0x6: JLE(Jz);
+                    0x7: JNLE(Jz);
+                }
             }
             0x12: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: seto_Eb();
+                0x1: setno_Eb();
+                0x2: setb_Eb();
+                0x3: setnb_Eb();
+                0x4: setz_Eb();
+                0x5: setnz_Eb();
+                0x6: setbe_Eb();
+                0x7: setnbe_Eb();
             }
             0x13: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: sets_Eb();
+                0x1: setns_Eb();
+                0x2: setp_Eb();
+                0x3: setnp_Eb();
+                0x4: setl_Eb();
+                0x5: setnl_Eb();
+                0x6: setle_Eb();
+                0x7: setnle_Eb();
             }
             0x14: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: push_fs();
+                0x1: pop_fs();
+                0x2: cpuid();
+                0x3: bt_Ev_Gv();
+                0x4: shld_Ev_Gv_Ib();
+                0x5: shld_Ev_Gv_rCl();
+                0x6: xbts_and_cmpxchg();
+                0x7: ibts_and_cmpxchg();
             }
             0x15: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: push_gs();
+                0x1: pop_gs();
+                0x2: rsm_smm();
+                0x3: bts_Ev_Gv();
+                0x4: shrd_Ev_Gv_Ib();
+                0x5: shrd_Ev_Gv_rCl();
+                0x6: group16();
+                0x7: Inst::IMUL(Gv,Ev);
             }
             0x16: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: cmpxchg_Eb_Gb();
+                0x1: cmpxchg_Ev_Gv();
+                0x2: lss_Gz_Mp();
+                0x3: btr_Ev_Gv();
+                0x4: lfs_Gz_Mp();
+                0x5: lgs_Gz_Mp();
+                0x6: Inst::MOVZX_B(Gv,Eb);
+                0x7: Inst::MOVZX_W(Gv,Ew);
             }
             0x17: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
+                0x0: jmpe_Jz(); // IA-64?
+                0x1: group11_UD2();
+                0x2: group8_Ev_Ib();
+                0x3: btc_Ev_Gv();
+                0x4: bsf_Gv_Ev();
+                0x5: bsr_Gv_Ev();
+                0x6: Inst::MOVSX_B(Gv,Eb);
+                0x7: Inst::MOVSX_W(Gv,Ew);
             }
             0x18: decode OPCODE_OP_BOTTOM3 {
                 0x0: holder();
@@ -315,16 +319,7 @@
                 0x6: holder();
                 0x7: holder();
             }
-            0x19: decode OPCODE_OP_BOTTOM3 {
-                0x0: holder();
-                0x1: holder();
-                0x2: holder();
-                0x3: holder();
-                0x4: holder();
-                0x5: holder();
-                0x6: holder();
-                0x7: holder();
-            }
+            0x19: bswap_B();
             0x1A: decode OPCODE_OP_BOTTOM3 {
                 0x0: holder();
                 0x1: holder();
diff --git a/src/arch/x86/isa/formats/error.isa b/src/arch/x86/isa/formats/error.isa
index 8ac2ea44d..e85eff762 100644
--- a/src/arch/x86/isa/formats/error.isa
+++ b/src/arch/x86/isa/formats/error.isa
@@ -64,7 +64,7 @@
 
 def template ErrorDecode {{
     {
-        panic("X86 decoder internal error: '%%s' %%s",
+        panic("X86 decoder internal error: '%s' %s",
                 %(message)s, machInst);
     }
 }};
diff --git a/src/arch/x86/isa/formats/formats.isa b/src/arch/x86/isa/formats/formats.isa
index d763c05bc..1e7bb4a74 100644
--- a/src/arch/x86/isa/formats/formats.isa
+++ b/src/arch/x86/isa/formats/formats.isa
@@ -98,3 +98,7 @@
 //Include a format which implements a batch of instructions which do the same
 //thing on a variety of inputs
 ##include "multi.isa"
+
+//Include a format which makes instructions who's sole purpose is to generate
+//a syscall.
+##include "syscall.isa"
diff --git a/src/arch/x86/isa/formats/syscall.isa b/src/arch/x86/isa/formats/syscall.isa
new file mode 100644
index 000000000..8b860dba4
--- /dev/null
+++ b/src/arch/x86/isa/formats/syscall.isa
@@ -0,0 +1,112 @@
+// -*- mode:c++ -*-
+
+// Copyright (c) 2007 The Hewlett-Packard Development Company
+// All rights reserved.
+//
+// Redistribution and use of this software in source and binary forms,
+// with or without modification, are permitted provided that the
+// following conditions are met:
+//
+// The software must be used only for Non-Commercial Use which means any
+// use which is NOT directed to receiving any direct monetary
+// compensation for, or commercial advantage from such use.  Illustrative
+// examples of non-commercial use are academic research, personal study,
+// teaching, education and corporate research & development.
+// Illustrative examples of commercial use are distributing products for
+// commercial advantage and providing services using the software for
+// commercial advantage.
+//
+// If you wish to use this software or functionality therein that may be
+// covered by patents for commercial use, please contact:
+//     Director of Intellectual Property Licensing
+//     Office of Strategy and Technology
+//     Hewlett-Packard Company
+//     1501 Page Mill Road
+//     Palo Alto, California  94304
+//
+// Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.  Redistributions
+// in binary form must reproduce the above copyright notice, this list of
+// conditions and the following disclaimer in the documentation and/or
+// other materials provided with the distribution.  Neither the name of
+// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.  No right of
+// sublicense is granted herewith.  Derivatives of the software and
+// output created using the software may be prepared, but only for
+// Non-Commercial Uses.  Derivatives of the software may be shared with
+// others provided: (i) the others agree to abide by the list of
+// conditions herein which includes the Non-Commercial Use restrictions;
+// and (ii) such Derivatives of the software include the above copyright
+// notice to acknowledge the contribution from this software where
+// applicable, this list of conditions and the disclaimer below.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Authors: Gabe Black
+
+////////////////////////////////////////////////////////////////////
+//
+// "Format" which describes an instruction whose only purpose is to
+// call a syscall in SE mode.
+//
+
+output header {{
+    class SyscallInst : public X86ISA::X86StaticInst
+    {
+      public:
+        /// Constructor
+        SyscallInst(const char *_mnemonic, ExtMachInst _machInst,
+                OpClass __opClass) :
+            X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
+        {
+        }
+
+        std::string generateDisassembly(Addr pc,
+                const SymbolTable *symtab) const;
+    };
+}};
+
+output decoder {{
+    std::string SyscallInst::generateDisassembly(Addr PC,
+            const SymbolTable *symtab) const
+    {
+        std::stringstream response;
+
+        printMnemonic(response, mnemonic);
+        ccprintf(response, " ");
+        printReg(response, _srcRegIdx[0], machInst.opSize);
+        return response.str();
+    }
+}};
+
+def template SyscallExecute {{
+    Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
+            Trace::InstRecord *traceData) const
+    {
+        Fault fault = NoFault;
+        %(op_decl)s;
+        %(op_rd)s;
+        %(code)s;
+        return fault;
+    }
+}};
+
+def format SyscallInst(code, *opt_flags) {{
+    iop = InstObjParams(name, Name, 'SyscallInst', code, opt_flags)
+    header_output = BasicDeclare.subst(iop)
+    decoder_output = BasicConstructor.subst(iop)
+    decode_block = BasicDecode.subst(iop)
+    exec_output = SyscallExecute.subst(iop)
+}};
+
diff --git a/src/arch/x86/isa/formats/unimp.isa b/src/arch/x86/isa/formats/unimp.isa
index 12fa8387b..183beb3b8 100644
--- a/src/arch/x86/isa/formats/unimp.isa
+++ b/src/arch/x86/isa/formats/unimp.isa
@@ -68,12 +68,12 @@ output header {{
      * 'Unknown' class is used for unrecognized/illegal instructions.
      * This is a leaf class.
      */
-    class FailUnimplemented : public X86StaticInst
+    class FailUnimplemented : public X86ISA::X86StaticInst
     {
       public:
         /// Constructor
         FailUnimplemented(const char *_mnemonic, ExtMachInst _machInst)
-            : X86StaticInst(_mnemonic, _machInst, No_OpClass)
+            : X86ISA::X86StaticInst(_mnemonic, _machInst, No_OpClass)
         {
             // don't call execute() (which panics) if we're on a
             // speculative path
@@ -95,7 +95,7 @@ output header {{
      * probably make the 'warned' flag a static member of the derived
      * class.
      */
-    class WarnUnimplemented : public X86StaticInst
+    class WarnUnimplemented : public X86ISA::X86StaticInst
     {
       private:
         /// Have we warned on this instruction yet?
@@ -104,7 +104,7 @@ output header {{
       public:
         /// Constructor
         WarnUnimplemented(const char *_mnemonic, ExtMachInst _machInst)
-            : X86StaticInst(_mnemonic, _machInst, No_OpClass), warned(false)
+            : X86ISA::X86StaticInst(_mnemonic, _machInst, No_OpClass), warned(false)
         {
             // don't call execute() (which panics) if we're on a
             // speculative path
diff --git a/src/arch/x86/isa/includes.isa b/src/arch/x86/isa/includes.isa
index 4f27c72f5..58aef7b1d 100644
--- a/src/arch/x86/isa/includes.isa
+++ b/src/arch/x86/isa/includes.isa
@@ -97,6 +97,9 @@ output header {{
 #include <iostream>
 
 #include "arch/x86/emulenv.hh"
+#include "arch/x86/insts/microldstop.hh"
+#include "arch/x86/insts/microregop.hh"
+#include "arch/x86/insts/static_inst.hh"
 #include "arch/x86/isa_traits.hh"
 #include "arch/x86/regfile.hh"
 #include "arch/x86/types.hh"
@@ -108,6 +111,7 @@ output header {{
 
 output decoder {{
 #include "arch/x86/faults.hh"
+#include "arch/x86/miscregs.hh"
 #include "arch/x86/segmentregs.hh"
 #include "base/cprintf.hh"
 #include "base/loader/symtab.hh"
diff --git a/src/arch/x86/isa/insts/__init__.py b/src/arch/x86/isa/insts/__init__.py
index 717690926..f5c4e3113 100644
--- a/src/arch/x86/isa/insts/__init__.py
+++ b/src/arch/x86/isa/insts/__init__.py
@@ -69,7 +69,8 @@ categories = ["arithmetic",
               "rotate_and_shift",
               "semaphores",
               "string",
-              "system_calls"]
+              "system_calls",
+              "system"]
 
 microcode = '''
 # X86 microcode
diff --git a/src/arch/x86/isa/insts/arithmetic/add_and_subtract.py b/src/arch/x86/isa/insts/arithmetic/add_and_subtract.py
index 809b9ac7c..05aa6cd69 100644
--- a/src/arch/x86/isa/insts/arithmetic/add_and_subtract.py
+++ b/src/arch/x86/isa/insts/arithmetic/add_and_subtract.py
@@ -54,23 +54,227 @@
 # Authors: Gabe Black
 
 microcode = '''
+def macroop ADD_R_R
+{
+    add reg, reg, regm
+};
+
+def macroop ADD_R_I
+{
+    limm t1, imm
+    add reg, reg, t1
+};
+
+def macroop ADD_M_I
+{
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    add t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADD_P_I
+{
+    rdip t7
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    add t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADD_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    add t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADD_P_R
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    add t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADD_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    add reg, reg, t1
+};
+
+def macroop ADD_R_P
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    add reg, reg, t1
+};
+
+def macroop SUB_R_R
+{
+    sub reg, reg, regm
+};
+
 def macroop SUB_R_I
 {
-    subi reg, reg, imm
+    limm t1, imm
+    sub reg, reg, t1
+};
+
+def macroop SUB_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    sub reg, reg, t1
+};
+
+def macroop SUB_R_P
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    sub reg, reg, t1
 };
 
 def macroop SUB_M_I
 {
+    limm t2, imm
     ld t1, ds, [scale, index, base], disp
-    subi t1, t1, imm
+    sub t1, t1, t2
     st t1, ds, [scale, index, base], disp
 };
 
 def macroop SUB_P_I
 {
     rdip t7
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    sub t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SUB_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    sub t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SUB_P_R
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    sub t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADC_R_R
+{
+    adc reg, reg, regm
+};
+
+def macroop ADC_R_I
+{
+    limm t1, imm
+    adc reg, reg, t1
+};
+
+def macroop ADC_M_I
+{
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    adc t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADC_P_I
+{
+    rdip t7
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    adc t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADC_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    adc t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADC_P_R
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    adc t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ADC_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    adc reg, reg, t1
+};
+
+def macroop ADC_R_P
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    adc reg, reg, t1
+};
+
+def macroop SBB_R_R
+{
+    sbb reg, reg, regm
+};
+
+def macroop SBB_R_I
+{
+    limm t1, imm
+    sbb reg, reg, t1
+};
+
+def macroop SBB_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    sbb reg, reg, t1
+};
+
+def macroop SBB_R_P
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    sbb reg, reg, t1
+};
+
+def macroop SBB_M_I
+{
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    sbb t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SBB_P_I
+{
+    rdip t7
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    sbb t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SBB_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    sbb t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SBB_P_R
+{
+    rdip t7
     ld t1, ds, [scale, index, base], disp
-    subi t1, t1, imm
+    sbb t1, t1, reg
     st t1, ds, [scale, index, base], disp
 };
 '''
diff --git a/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py b/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py
index c504d47ce..eed39c10c 100644
--- a/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py
+++ b/src/arch/x86/isa/insts/arithmetic/increment_and_decrement.py
@@ -53,7 +53,47 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
+microcode = '''
+def macroop INC_R
+{
+    addi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+};
+
+def macroop INC_M
+{
+    ld t1, ds, [scale, index, base], disp
+    addi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop INC_P
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    addi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop DEC_R
+{
+    subi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+};
+
+def macroop DEC_M
+{
+    ld t1, ds, [scale, index, base], disp
+    subi t1, t1, 1, flags=(OF, SF, ZF, AF, PF)
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop DEC_P
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    subi reg, reg, 1, flags=(OF, SF, ZF, AF, PF)
+    st t1, ds, [0, t0, t7], disp
+};
+'''
 #let {{
 #    class DEC(Inst):
 #	"GenFault ${new UnimpInstFault}"
diff --git a/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py b/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py
index 662022e6a..8697bef65 100644
--- a/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py
+++ b/src/arch/x86/isa/insts/arithmetic/multiply_and_divide.py
@@ -53,7 +53,31 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
+microcode = '''
+
+#
+# Two operand signed multiply. These should set the CF and OF flags if the
+# result is too large for the destination register
+#
+
+def macroop IMUL_R_R
+{
+    mul1s reg, reg, regm
+};
+
+def macroop IMUL_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    mul1s reg, reg, t1
+};
+
+def macroop IMUL_R_P
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    mul1s reg, reg, t1
+};
+'''
 #let {{
 #    class MUL(Inst):
 #	"GenFault ${new UnimpInstFault}"
diff --git a/src/arch/x86/isa/insts/compare_and_test/compare.py b/src/arch/x86/isa/insts/compare_and_test/compare.py
index 12b5b859f..8f5890b23 100644
--- a/src/arch/x86/isa/insts/compare_and_test/compare.py
+++ b/src/arch/x86/isa/insts/compare_and_test/compare.py
@@ -53,8 +53,56 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
-#let {{
-#    class CMP(Inst):
-#	"GenFault ${new UnimpInstFault}"
-#}};
+microcode = '''
+def macroop CMP_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    sub t0, reg, t1, flags=(OF, SF, ZF, AF, PF, CF)
+};
+
+def macroop CMP_R_P
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    sub t0, reg, t1, flags=(OF, SF, ZF, AF, PF, CF)
+};
+
+def macroop CMP_M_I
+{
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    sub t0, t1, t2, flags=(OF, SF, ZF, AF, PF, CF)
+};
+
+def macroop CMP_P_I
+{
+    limm t2, imm
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    sub t0, t1, t2, flags=(OF, SF, ZF, AF, PF, CF)
+};
+
+def macroop CMP_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    sub t0, t1, reg, flags=(OF, SF, ZF, AF, PF, CF)
+};
+
+def macroop CMP_P_R
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    sub t0, t1, reg, flags=(OF, SF, ZF, AF, PF, CF)
+};
+
+def macroop CMP_R_R
+{
+    sub t0, reg, regm, flags=(OF, SF, ZF, AF, PF, CF)
+};
+
+def macroop CMP_R_I
+{
+    limm t1, imm
+    sub t0, reg, t1, flags=(OF, SF, ZF, AF, PF, CF)
+};
+'''
diff --git a/src/arch/x86/isa/insts/compare_and_test/test.py b/src/arch/x86/isa/insts/compare_and_test/test.py
index 89d406912..8da33899a 100644
--- a/src/arch/x86/isa/insts/compare_and_test/test.py
+++ b/src/arch/x86/isa/insts/compare_and_test/test.py
@@ -57,39 +57,39 @@ microcode = '''
 def macroop TEST_M_R
 {
     ld t1, ds, [scale, index, base], disp
-    and t0, t1, reg
+    and t0, t1, reg, flags=(SF, ZF, PF)
 };
 
 def macroop TEST_P_R
 {
     rdip t7
-    ld t1, ds, [scale, index, base], disp
-    and t0, t1, reg
+    ld t1, ds, [0, t0, t7], disp
+    and t0, t1, reg, flags=(SF, ZF, PF)
 };
 
 def macroop TEST_R_R
 {
-    and t0, reg, regm
+    and t0, reg, regm, flags=(SF, ZF, PF)
 };
 
 def macroop TEST_M_I
 {
     ld t1, ds, [scale, index, base], disp
     limm t2, imm
-    and t0, t1, t2
+    and t0, t1, t2, flags=(SF, ZF, PF)
 };
 
 def macroop TEST_P_I
 {
     rdip t7
-    ld t1, ds, [scale, index, base], disp
+    ld t1, ds, [0, t0, t7], disp
     limm t2, imm
-    and t0, t1, t2
+    and t0, t1, t2, flags=(SF, ZF, PF)
 };
 
 def macroop TEST_R_I
 {
     limm t1, imm
-    and t0, reg, t1
+    and t0, reg, t1, flags=(SF, ZF, PF)
 };
 '''
diff --git a/src/arch/x86/isa/insts/control_transfer/call.py b/src/arch/x86/isa/insts/control_transfer/call.py
index 530162bfd..c5bb66e58 100644
--- a/src/arch/x86/isa/insts/control_transfer/call.py
+++ b/src/arch/x86/isa/insts/control_transfer/call.py
@@ -54,16 +54,51 @@
 # Authors: Gabe Black
 
 microcode = '''
-def macroop CALL_I
+def macroop CALL_NEAR_I
 {
-    # Make the default data size of pops 64 bits in 64 bit mode
+    # Make the default data size of calls 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    limm t1, imm
+    rdip t7
+    subi rsp, rsp, dsz
+    st t7, ss, [0, t0, rsp]
+    wrip t7, t1
+};
+
+def macroop CALL_NEAR_R
+{
+    # Make the default data size of calls 64 bits in 64 bit mode
     .adjust_env oszIn64Override
 
-    limm t2, imm
     rdip t1
     subi rsp, rsp, dsz
     st t1, ss, [0, t0, rsp]
-    wrip t1, t2
+    wripi reg, 0
+};
+
+def macroop CALL_NEAR_M
+{
+    # Make the default data size of calls 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    subi rsp, rsp, dsz
+    st t7, ss, [0, t0, rsp]
+    wripi t1, 0
+};
+
+def macroop CALL_NEAR_P
+{
+    # Make the default data size of calls 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    subi rsp, rsp, dsz
+    st t7, ss, [0, t0, rsp]
+    wripi t1, 0
 };
 '''
 #let {{
diff --git a/src/arch/x86/isa/insts/control_transfer/jump.py b/src/arch/x86/isa/insts/control_transfer/jump.py
index e90e5b12b..158861a3d 100644
--- a/src/arch/x86/isa/insts/control_transfer/jump.py
+++ b/src/arch/x86/isa/insts/control_transfer/jump.py
@@ -53,8 +53,192 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
-#let {{
-#    class JMP(Inst):
-#	"GenFault ${new UnimpInstFault}"
-#}};
+microcode = '''
+def macroop JZ_I
+{
+    # Make the defualt data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(CZF,)
+};
+
+def macroop JNZ_I
+{
+    # Make the defualt data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCZF,)
+};
+
+def macroop JB_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(CCF,)
+};
+
+def macroop JNB_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCCF,)
+};
+
+def macroop JBE_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(CCvZF,)
+};
+
+def macroop JNBE_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCCvZF,)
+};
+
+def macroop JS_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(CSF,)
+};
+
+def macroop JNS_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCSF,)
+};
+
+def macroop JP_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(CPF,)
+};
+
+def macroop JNP_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCPF,)
+};
+
+def macroop JL_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(CSxOF,)
+};
+
+def macroop JNL_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCSxOF,)
+};
+
+def macroop JLE_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(CSxOvZF,)
+};
+
+def macroop JNLE_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCSxOvZF,)
+};
+
+def macroop JO_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(COF,)
+};
+
+def macroop JNO_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2, flags=(nCOF,)
+};
+
+def macroop JMP_I
+{
+    # Make the default data size of jumps 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t1
+    limm t2, imm
+    wrip t1, t2
+};
+
+def macroop JMP_R
+{
+    wripi reg, 0
+};
+
+def macroop JMP_M
+{
+    ld t1, ds, [scale, index, base], disp
+    wripi t1, 0
+};
+
+def macroop JMP_P
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    wripi t1, 0
+};
+'''
diff --git a/src/arch/x86/isa/insts/control_transfer/xreturn.py b/src/arch/x86/isa/insts/control_transfer/xreturn.py
index aaffa2b92..0000cd3c1 100644
--- a/src/arch/x86/isa/insts/control_transfer/xreturn.py
+++ b/src/arch/x86/isa/insts/control_transfer/xreturn.py
@@ -53,8 +53,26 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
-#let {{
-#   class RET(Inst):
-# 	"GenFault ${new UnimpInstFault}"
-#}};
+microcode = '''
+def macroop RET_NEAR
+{
+    # Make the default data size of rets 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    ld t1, ss, [0, t0, rsp]
+    addi rsp, rsp, dsz
+    wripi t1, 0
+};
+
+def macroop RET_NEAR_I
+{
+    # Make the default data size of rets 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    limm t2, imm
+    ld t1, ss, [0, t0, rsp]
+    addi rsp, rsp, dsz
+    add rsp, rsp, t2
+    wripi t1, 0
+};
+'''
diff --git a/src/arch/x86/isa/insts/data_transfer/__init__.py b/src/arch/x86/isa/insts/data_transfer/__init__.py
index eda173b34..365f95eaa 100644
--- a/src/arch/x86/isa/insts/data_transfer/__init__.py
+++ b/src/arch/x86/isa/insts/data_transfer/__init__.py
@@ -55,7 +55,8 @@
 
 categories = ["conditional_move",
               "move",
-              "stack_operations"]
+              "stack_operations",
+              "xchg"]
 
 microcode = ""
 for category in categories:
diff --git a/src/arch/x86/isa/insts/data_transfer/move.py b/src/arch/x86/isa/insts/data_transfer/move.py
index c85dd7cc4..bbc55e47c 100644
--- a/src/arch/x86/isa/insts/data_transfer/move.py
+++ b/src/arch/x86/isa/insts/data_transfer/move.py
@@ -54,6 +54,11 @@
 # Authors: Gabe Black
 
 microcode = '''
+
+#
+# Regular moves
+#
+
 def macroop MOV_R_R {
     mov reg, reg, regm
 };
@@ -64,7 +69,7 @@ def macroop MOV_M_R {
 
 def macroop MOV_P_R {
     rdip t7
-    st reg, ds, [scale, index, base], disp
+    st reg, ds, [0, t0, t7], disp
 };
 
 def macroop MOV_R_M {
@@ -73,7 +78,7 @@ def macroop MOV_R_M {
 
 def macroop MOV_R_P {
     rdip t7
-    ld reg, ds, [scale, index, base], disp
+    ld reg, ds, [0, t0, t7], disp
 };
 
 def macroop MOV_R_I {
@@ -88,22 +93,90 @@ def macroop MOV_M_I {
 def macroop MOV_P_I {
     rdip t7
     limm t1, imm
-    st t1, ds, [scale, index, base], disp
+    st t1, ds, [0, t0, t7], disp
 };
 
+#
+# Sign extending moves
+#
+
 def macroop MOVSXD_R_R {
-    sext reg, regm, dsz
+    sext reg, regm, 32
 };
 
 def macroop MOVSXD_R_M {
-    ld t1, ds, [scale, index, base], disp
-    sext reg, t1, dsz
+    ld t1, ds, [scale, index, base], disp, dataSize=4
+    sext reg, t1, 32
 };
 
 def macroop MOVSXD_R_P {
     rdip t7
-    ld t1, ds, [scale, index, base], disp
-    sext reg, t1, dsz
+    ld t1, ds, [0, t0, t7], disp, dataSize=4
+    sext reg, t1, 32
+};
+
+def macroop MOVSX_B_R_R {
+    sext reg, regm, 8
+};
+
+def macroop MOVSX_B_R_M {
+    ld reg, ds, [scale, index, base], disp, dataSize=1
+    sext reg, reg, 8
+};
+
+def macroop MOVSX_B_R_P {
+    rdip t7
+    ld reg, ds, [0, t0, t7], disp, dataSize=1
+    sext reg, reg, 8
+};
+
+def macroop MOVSX_W_R_R {
+    sext reg, regm, 16
+};
+
+def macroop MOVSX_W_R_M {
+    ld reg, ds, [scale, index, base], disp, dataSize=2
+    sext reg, reg, 16
+};
+
+def macroop MOVSX_W_R_P {
+    rdip t7
+    ld reg, ds, [0, t0, t7], disp, dataSize=2
+    sext reg, reg, 16
+};
+
+#
+# Zero extending moves
+#
+
+def macroop MOVZX_B_R_R {
+    zext reg, regm, 8
+};
+
+def macroop MOVZX_B_R_M {
+    ld t1, ds, [scale, index, base], disp, dataSize=1
+    zext reg, t1, 8
+};
+
+def macroop MOVZX_B_R_P {
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp, dataSize=1
+    zext reg, t1, 8
+};
+
+def macroop MOVZX_W_R_R {
+    zext reg, regm, 16
+};
+
+def macroop MOVZX_W_R_M {
+    ld t1, ds, [scale, index, base], disp, dataSize=2
+    zext reg, t1, 16
+};
+
+def macroop MOVZX_W_R_P {
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp, dataSize=2
+    zext reg, t1, 16
 };
 '''
 #let {{
diff --git a/src/arch/x86/isa/insts/data_transfer/stack_operations.py b/src/arch/x86/isa/insts/data_transfer/stack_operations.py
index 585437b8c..c381dc4f4 100644
--- a/src/arch/x86/isa/insts/data_transfer/stack_operations.py
+++ b/src/arch/x86/isa/insts/data_transfer/stack_operations.py
@@ -69,6 +69,25 @@ def macroop PUSH_R {
     subi rsp, rsp, dsz
     st reg, ss, [0, t0, rsp]
 };
+
+def macroop PUSH_M {
+    # Make the default data size of pops 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    ld t1, ds, [scale, index, base], disp
+    subi rsp, rsp, dsz
+    st t1, ss, [0, t0, rsp]
+};
+
+def macroop PUSH_P {
+    # Make the default data size of pops 64 bits in 64 bit mode
+    .adjust_env oszIn64Override
+
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    subi rsp, rsp, dsz
+    st t1, ss, [0, t0, rsp]
+};
 '''
 #let {{
 #    class POPA(Inst):
diff --git a/src/arch/x86/isa/insts/data_transfer/xchg.py b/src/arch/x86/isa/insts/data_transfer/xchg.py
new file mode 100644
index 000000000..4f401deb7
--- /dev/null
+++ b/src/arch/x86/isa/insts/data_transfer/xchg.py
@@ -0,0 +1,98 @@
+# Copyright (c) 2007 The Hewlett-Packard Development Company
+# All rights reserved.
+#
+# Redistribution and use of this software in source and binary forms,
+# with or without modification, are permitted provided that the
+# following conditions are met:
+#
+# The software must be used only for Non-Commercial Use which means any
+# use which is NOT directed to receiving any direct monetary
+# compensation for, or commercial advantage from such use.  Illustrative
+# examples of non-commercial use are academic research, personal study,
+# teaching, education and corporate research & development.
+# Illustrative examples of commercial use are distributing products for
+# commercial advantage and providing services using the software for
+# commercial advantage.
+#
+# If you wish to use this software or functionality therein that may be
+# covered by patents for commercial use, please contact:
+#     Director of Intellectual Property Licensing
+#     Office of Strategy and Technology
+#     Hewlett-Packard Company
+#     1501 Page Mill Road
+#     Palo Alto, California  94304
+#
+# Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.  Redistributions
+# in binary form must reproduce the above copyright notice, this list of
+# conditions and the following disclaimer in the documentation and/or
+# other materials provided with the distribution.  Neither the name of
+# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.  No right of
+# sublicense is granted herewith.  Derivatives of the software and
+# output created using the software may be prepared, but only for
+# Non-Commercial Uses.  Derivatives of the software may be shared with
+# others provided: (i) the others agree to abide by the list of
+# conditions herein which includes the Non-Commercial Use restrictions;
+# and (ii) such Derivatives of the software include the above copyright
+# notice to acknowledge the contribution from this software where
+# applicable, this list of conditions and the disclaimer below.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Gabe Black
+
+microcode = '''
+
+# All the memory versions need to use LOCK, regardless of if it was set
+
+def macroop XCHG_R_R
+{
+    # Use the xor trick instead of moves to reduce register pressure.
+    # This probably doesn't make much of a difference, but it's easy.
+    xor reg, reg, regm
+    xor regm, regm, reg
+    xor reg, reg, regm
+};
+
+def macroop XCHG_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    st reg, ds, [scale, index, base], disp
+    mov reg, reg, t1
+};
+
+def macroop XCHG_R_P
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    st reg, ds, [0, t0, t7], disp
+    mov reg, reg, t1
+};
+
+def macroop XCHG_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    st reg, ds, [scale, index, base], disp
+    mov reg, reg, t1
+};
+
+def macroop XCHG_P_R
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    st reg, ds, [0, t0, t7], disp
+    mov reg, reg, t1
+};
+'''
diff --git a/src/arch/x86/isa/insts/logical.py b/src/arch/x86/isa/insts/logical.py
index 2fd369d60..f99638cac 100644
--- a/src/arch/x86/isa/insts/logical.py
+++ b/src/arch/x86/isa/insts/logical.py
@@ -54,6 +54,62 @@
 # Authors: Gabe Black
 
 microcode = '''
+def macroop OR_R_R
+{
+    or reg, reg, regm
+};
+
+def macroop OR_M_I
+{
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    or t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop OR_P_I
+{
+    limm t2, imm
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    or t1, t1, t2
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop OR_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    or t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop OR_P_R
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    or t1, t1, reg
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop OR_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    or reg, reg, t1
+};
+
+def macroop OR_R_P
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    or reg, reg, t1
+};
+
+def macroop OR_R_I
+{
+    limm t1, imm
+    or reg, reg, t1
+};
+
 def macroop XOR_R_R
 {
     xor reg, reg, regm
@@ -65,6 +121,23 @@ def macroop XOR_R_I
     xor reg, reg, t1
 };
 
+def macroop XOR_M_I
+{
+    limm t2, imm
+    ld t1, ds, [scale, index, base], disp
+    xor t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop XOR_P_I
+{
+    limm t2, imm
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    xor t1, t1, t2
+    st t1, ds, [scale, index, base], disp
+};
+
 def macroop XOR_M_R
 {
     ld t1, ds, [scale, index, base], disp
@@ -93,6 +166,24 @@ def macroop XOR_R_P
     xor reg, reg, t1
 };
 
+def macroop AND_R_R
+{
+    and reg, reg, regm
+};
+
+def macroop AND_R_M
+{
+    ld t1, ds, [scale, index, base], disp
+    and reg, reg, t1
+};
+
+def macroop AND_R_P
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    and reg, reg, t1
+};
+
 def macroop AND_R_I
 {
     limm t1, imm
@@ -115,6 +206,21 @@ def macroop AND_P_I
     and t2, t2, t1
     st t2, ds, [scale, index, base], disp
 };
+
+def macroop AND_M_R
+{
+    ld t1, ds, [scale, index, base], disp
+    and t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop AND_P_R
+{
+    rdip t7
+    ld t1, ds, [scale, index, base], disp
+    and t1, t1, reg
+    st t1, ds, [scale, index, base], disp
+};
 '''
 #let {{
 #microcodeString = '''
diff --git a/src/arch/x86/isa/insts/no_operation.py b/src/arch/x86/isa/insts/no_operation.py
index 1a287aea7..306ee2797 100644
--- a/src/arch/x86/isa/insts/no_operation.py
+++ b/src/arch/x86/isa/insts/no_operation.py
@@ -53,8 +53,9 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
-#let {{
-#   class NOP(Inst):
-# 	"GenFault ${new UnimpInstFault}"
-#}};
+microcode = '''
+def macroop NOP
+{
+    fault "NoFault"
+};
+'''
diff --git a/src/arch/x86/isa/insts/rotate_and_shift/rotate.py b/src/arch/x86/isa/insts/rotate_and_shift/rotate.py
index e3aaf0043..0988f8815 100644
--- a/src/arch/x86/isa/insts/rotate_and_shift/rotate.py
+++ b/src/arch/x86/isa/insts/rotate_and_shift/rotate.py
@@ -53,14 +53,90 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
+microcode = '''
+def macroop ROL_R_I
+{
+    rol reg, reg, imm
+};
+
+def macroop ROL_M_I
+{
+    ld t1, ds, [scale, index, base], disp
+    rol t1, t1, imm
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ROL_P_I
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    rol t1, t1, imm
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop ROR_R_I
+{
+    ror reg, reg, imm
+};
+
+def macroop ROR_M_I
+{
+    ld t1, ds, [scale, index, base], disp
+    ror t1, t1, imm
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop ROR_P_I
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    ror t1, t1, imm
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop RCL_R_I
+{
+    rcl reg, reg, imm
+};
+
+def macroop RCL_M_I
+{
+    ld t1, ds, [scale, index, base], disp
+    rcl t1, t1, imm
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop RCL_P_I
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    rcl t1, t1, imm
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop RCR_R_I
+{
+    rcr reg, reg, imm
+};
+
+def macroop RCR_M_I
+{
+    ld t1, ds, [scale, index, base], disp
+    rcr t1, t1, imm
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop RCR_P_I
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    rcr t1, t1, imm
+    st t1, ds, [0, t0, t7], disp
+};
+'''
 #let {{
 #    class RCL(Inst):
 #	"GenFault ${new UnimpInstFault}"
 #    class RCR(Inst):
 #	"GenFault ${new UnimpInstFault}"
-#    class ROL(Inst):
-#	"GenFault ${new UnimpInstFault}"
-#    class ROR(Inst):
-#	"GenFault ${new UnimpInstFault}"
 #}};
diff --git a/src/arch/x86/isa/insts/rotate_and_shift/shift.py b/src/arch/x86/isa/insts/rotate_and_shift/shift.py
index f72794657..5a04317d9 100644
--- a/src/arch/x86/isa/insts/rotate_and_shift/shift.py
+++ b/src/arch/x86/isa/insts/rotate_and_shift/shift.py
@@ -53,7 +53,67 @@
 #
 # Authors: Gabe Black
 
-microcode = ""
+microcode = '''
+def macroop SAL_R_I
+{
+    sll reg, reg, imm
+};
+
+def macroop SAL_M_I
+{
+    ld t1, ds, [scale, index, base], disp
+    sll t1, t1, imm
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SAL_P_I
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    sll t1, t1, imm
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop SHR_R_I
+{
+    srl reg, reg, imm
+};
+
+def macroop SHR_M_I
+{
+    ld t1, ds, [scale, index, base], disp
+    srl t1, t1, imm
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SHR_P_I
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    srl t1, t1, imm
+    st t1, ds, [0, t0, t7], disp
+};
+
+def macroop SAR_R_I
+{
+    sra reg, reg, imm
+};
+
+def macroop SAR_M_I
+{
+    ld t1, ds, [scale, index, base], disp
+    sra t1, t1, imm
+    st t1, ds, [scale, index, base], disp
+};
+
+def macroop SAR_P_I
+{
+    rdip t7
+    ld t1, ds, [0, t0, t7], disp
+    sra t1, t1, imm
+    st t1, ds, [0, t0, t7], disp
+};
+'''
 #let {{
 #    class SAL(Inst):
 #	"GenFault ${new UnimpInstFault}"
diff --git a/src/arch/x86/isa/insts/system/__init__.py b/src/arch/x86/isa/insts/system/__init__.py
new file mode 100644
index 000000000..72e3bdf0a
--- /dev/null
+++ b/src/arch/x86/isa/insts/system/__init__.py
@@ -0,0 +1,62 @@
+# Copyright (c) 2007 The Hewlett-Packard Development Company
+# All rights reserved.
+#
+# Redistribution and use of this software in source and binary forms,
+# with or without modification, are permitted provided that the
+# following conditions are met:
+#
+# The software must be used only for Non-Commercial Use which means any
+# use which is NOT directed to receiving any direct monetary
+# compensation for, or commercial advantage from such use.  Illustrative
+# examples of non-commercial use are academic research, personal study,
+# teaching, education and corporate research & development.
+# Illustrative examples of commercial use are distributing products for
+# commercial advantage and providing services using the software for
+# commercial advantage.
+#
+# If you wish to use this software or functionality therein that may be
+# covered by patents for commercial use, please contact:
+#     Director of Intellectual Property Licensing
+#     Office of Strategy and Technology
+#     Hewlett-Packard Company
+#     1501 Page Mill Road
+#     Palo Alto, California  94304
+#
+# Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.  Redistributions
+# in binary form must reproduce the above copyright notice, this list of
+# conditions and the following disclaimer in the documentation and/or
+# other materials provided with the distribution.  Neither the name of
+# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.  No right of
+# sublicense is granted herewith.  Derivatives of the software and
+# output created using the software may be prepared, but only for
+# Non-Commercial Uses.  Derivatives of the software may be shared with
+# others provided: (i) the others agree to abide by the list of
+# conditions herein which includes the Non-Commercial Use restrictions;
+# and (ii) such Derivatives of the software include the above copyright
+# notice to acknowledge the contribution from this software where
+# applicable, this list of conditions and the disclaimer below.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Gabe Black
+
+categories = ["undefined_operation"]
+
+microcode = ""
+for category in categories:
+    exec "import %s as cat" % category
+    microcode += cat.microcode
+
diff --git a/src/arch/x86/isa/insts/system/undefined_operation.py b/src/arch/x86/isa/insts/system/undefined_operation.py
new file mode 100644
index 000000000..e5544b6e7
--- /dev/null
+++ b/src/arch/x86/isa/insts/system/undefined_operation.py
@@ -0,0 +1,61 @@
+# Copyright (c) 2007 The Hewlett-Packard Development Company
+# All rights reserved.
+#
+# Redistribution and use of this software in source and binary forms,
+# with or without modification, are permitted provided that the
+# following conditions are met:
+#
+# The software must be used only for Non-Commercial Use which means any
+# use which is NOT directed to receiving any direct monetary
+# compensation for, or commercial advantage from such use.  Illustrative
+# examples of non-commercial use are academic research, personal study,
+# teaching, education and corporate research & development.
+# Illustrative examples of commercial use are distributing products for
+# commercial advantage and providing services using the software for
+# commercial advantage.
+#
+# If you wish to use this software or functionality therein that may be
+# covered by patents for commercial use, please contact:
+#     Director of Intellectual Property Licensing
+#     Office of Strategy and Technology
+#     Hewlett-Packard Company
+#     1501 Page Mill Road
+#     Palo Alto, California  94304
+#
+# Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.  Redistributions
+# in binary form must reproduce the above copyright notice, this list of
+# conditions and the following disclaimer in the documentation and/or
+# other materials provided with the distribution.  Neither the name of
+# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.  No right of
+# sublicense is granted herewith.  Derivatives of the software and
+# output created using the software may be prepared, but only for
+# Non-Commercial Uses.  Derivatives of the software may be shared with
+# others provided: (i) the others agree to abide by the list of
+# conditions herein which includes the Non-Commercial Use restrictions;
+# and (ii) such Derivatives of the software include the above copyright
+# notice to acknowledge the contribution from this software where
+# applicable, this list of conditions and the disclaimer below.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Gabe Black
+
+microcode = '''
+def macroop UD2
+{
+    fault "new X86Fault"
+};
+'''
diff --git a/src/arch/x86/isa/main.isa b/src/arch/x86/isa/main.isa
index fed8903c0..73cebc12b 100644
--- a/src/arch/x86/isa/main.isa
+++ b/src/arch/x86/isa/main.isa
@@ -79,8 +79,8 @@ namespace X86ISA;
 //Include the bitfield definitions
 ##include "bitfields.isa"
 
-//Include the base class for x86 instructions, and some support code.
-##include "base.isa"
+//Include the OutputBlocks class which is used to bundle output.
+##include "outputblock.isa"
 
 //Include the definitions for the instruction formats
 ##include "formats/formats.isa"
diff --git a/src/arch/x86/isa/microasm.isa b/src/arch/x86/isa/microasm.isa
index ee2b92f53..213468b0b 100644
--- a/src/arch/x86/isa/microasm.isa
+++ b/src/arch/x86/isa/microasm.isa
@@ -56,9 +56,9 @@
 // Authors: Gabe Black
 
 //Include the definitions of the micro ops.
-//These are StaticInst classes which stand on their own and make up an
-//internal instruction set, and also python representations which are passed
-//into the microcode assembler.
+//These are python representations of static insts which stand on their own
+//and make up an internal instruction set. They are used by the micro
+//assembler.
 ##include "microops/microops.isa"
 
 //Include code to build macroops in both C++ and python.
@@ -96,6 +96,19 @@ let {{
         assembler.symbols["r%s" % reg] = "INTREG_R%s" % reg.upper()
     assembler.symbols.update(symbols)
 
+    for flag in ('CF', 'PF', 'ECF', 'AF', 'EZF', 'ZF', 'SF', 'OF'):
+        assembler.symbols[flag] = flag + "Bit"
+
+    for cond in ('True', 'False', 'ECF', 'EZF', 'SZnZF',
+                 'MSTRZ', 'STRZ', 'MSTRC', 'STRZnZF',
+                 'OF', 'CF', 'ZF', 'CvZF',
+                 'SF', 'PF', 'SxOF', 'SxOvZF'):
+        assembler.symbols["C%s" % cond] = "ConditionTests::%s" % cond
+        assembler.symbols["nC%s" % cond] = "ConditionTests::Not%s" % cond
+
+    assembler.symbols["CTrue"] = "ConditionTests::True"
+    assembler.symbols["CFalse"] = "ConditionTests::False"
+
     # Code literal which forces a default 64 bit operand size in 64 bit mode.
     assembler.symbols["oszIn64Override"] = '''
     if (machInst.mode.submode == SixtyFourBitMode &&
diff --git a/src/arch/x86/isa/microops/base.isa b/src/arch/x86/isa/microops/base.isa
index 79ac4493a..71fc3b3a5 100644
--- a/src/arch/x86/isa/microops/base.isa
+++ b/src/arch/x86/isa/microops/base.isa
@@ -61,42 +61,6 @@ let {{
     microopClasses = {}
 }};
 
-//A class which is the base of all x86 micro ops. It provides a function to
-//set necessary flags appropriately.
-output header {{
-    class X86MicroopBase : public X86StaticInst
-    {
-      protected:
-        const char * instMnem;
-        uint8_t opSize;
-        uint8_t addrSize;
-
-        X86MicroopBase(ExtMachInst _machInst,
-                const char *mnem, const char *_instMnem,
-                bool isMicro, bool isDelayed,
-                bool isFirst, bool isLast,
-                OpClass __opClass) :
-            X86StaticInst(mnem, _machInst, __opClass),
-            instMnem(_instMnem)
-        {
-            flags[IsMicroop] = isMicro;
-            flags[IsDelayedCommit] = isDelayed;
-            flags[IsFirstMicroop] = isFirst;
-            flags[IsLastMicroop] = isLast;
-        }
-
-        std::string generateDisassembly(Addr pc,
-                const SymbolTable *symtab) const
-        {
-            std::stringstream ss;
-
-            ccprintf(ss, "\t%s.%s", instMnem, mnemonic);
-
-            return ss.str();
-        }
-    };
-}};
-
 //////////////////////////////////////////////////////////////////////////
 //
 // Base class for the python representation of x86 microops
diff --git a/src/arch/x86/isa/microops/ldstop.isa b/src/arch/x86/isa/microops/ldstop.isa
index fbff899a0..ccf519963 100644
--- a/src/arch/x86/isa/microops/ldstop.isa
+++ b/src/arch/x86/isa/microops/ldstop.isa
@@ -59,63 +59,6 @@
 //
 //////////////////////////////////////////////////////////////////////////
 
-output header {{
-    /**
-     * Base class for load and store ops
-     */
-    class LdStOp : public X86MicroopBase
-    {
-      protected:
-        const uint8_t scale;
-        const RegIndex index;
-        const RegIndex base;
-        const uint64_t disp;
-        const uint8_t segment;
-        const RegIndex data;
-        const uint8_t dataSize;
-        const uint8_t addressSize;
-
-        //Constructor
-        LdStOp(ExtMachInst _machInst,
-                const char * mnem, const char * _instMnem,
-                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
-                uint8_t _scale, RegIndex _index, RegIndex _base,
-                uint64_t _disp, uint8_t _segment,
-                RegIndex _data,
-                uint8_t _dataSize, uint8_t _addressSize,
-                OpClass __opClass) :
-        X86MicroopBase(machInst, mnem, _instMnem,
-                isMicro, isDelayed, isFirst, isLast, __opClass),
-                scale(_scale), index(_index), base(_base),
-                disp(_disp), segment(_segment),
-                data(_data),
-                dataSize(_dataSize), addressSize(_addressSize)
-        {}
-
-        std::string generateDisassembly(Addr pc,
-            const SymbolTable *symtab) const;
-    };
-}};
-
-output decoder {{
-    std::string LdStOp::generateDisassembly(Addr pc,
-            const SymbolTable *symtab) const
-    {
-        std::stringstream response;
-
-        printMnemonic(response, instMnem, mnemonic);
-        printReg(response, data);
-        response << ", ";
-        printSegment(response, segment);
-        ccprintf(response, ":[%d*", scale);
-        printReg(response, index);
-        response << " + ";
-        printReg(response, base);
-        ccprintf(response, " + %#x]", disp);
-        return response.str();
-    }
-}};
-
 // LEA template
 
 def template MicroLeaExecute {{
@@ -180,7 +123,25 @@ def template MicroLoadExecute {{
         %(ea_code)s;
         DPRINTF(X86, "%s : %s: The address is %#x\n", instMnem, mnemonic, EA);
 
-        fault = xc->read(EA, (%(mem_acc_type)s%(mem_acc_size)s_t&)Mem, 0);
+        unsigned flags = 0;
+        switch(dataSize)
+        {
+          case 1:
+            fault = xc->read(EA, (uint8_t&)Mem, flags);
+            break;
+          case 2:
+            fault = xc->read(EA, (uint16_t&)Mem, flags);
+            break;
+          case 4:
+            fault = xc->read(EA, (uint32_t&)Mem, flags);
+            break;
+          case 8:
+            fault = xc->read(EA, (uint64_t&)Mem, flags);
+            break;
+          default:
+            panic("Bad operand size!\n");
+        }
+
         if(fault == NoFault)
         {
             %(code)s;
@@ -206,7 +167,24 @@ def template MicroLoadInitiateAcc {{
         %(ea_code)s;
         DPRINTF(X86, "%s : %s: The address is %#x\n", instMnem, mnemonic, EA);
 
-        fault = xc->read(EA, (%(mem_acc_type)s%(mem_acc_size)s_t&)Mem, 0);
+        unsigned flags = 0;
+        switch(dataSize)
+        {
+          case 1:
+            fault = xc->read(EA, (uint8_t&)Mem, flags);
+            break;
+          case 2:
+            fault = xc->read(EA, (uint16_t&)Mem, flags);
+            break;
+          case 4:
+            fault = xc->read(EA, (uint32_t&)Mem, flags);
+            break;
+          case 8:
+            fault = xc->read(EA, (uint64_t&)Mem, flags);
+            break;
+          default:
+            panic("Bad operand size!\n");
+        }
 
         return fault;
     }
@@ -252,8 +230,25 @@ def template MicroStoreExecute {{
 
         if(fault == NoFault)
         {
-            fault = xc->write((%(mem_acc_type)s%(mem_acc_size)s_t)Mem,
-                    EA, 0, 0);
+            unsigned flags = 0;
+            uint64_t *res = 0;
+            switch(dataSize)
+            {
+              case 1:
+                fault = xc->write((uint8_t&)Mem, EA, flags, res);
+                break;
+              case 2:
+                fault = xc->write((uint16_t&)Mem, EA, flags, res);
+                break;
+              case 4:
+                fault = xc->write((uint32_t&)Mem, EA, flags, res);
+                break;
+              case 8:
+                fault = xc->write((uint64_t&)Mem, EA, flags, res);
+                break;
+              default:
+                panic("Bad operand size!\n");
+            }
         }
         if(fault == NoFault)
         {
@@ -280,8 +275,25 @@ def template MicroStoreInitiateAcc {{
 
         if(fault == NoFault)
         {
-            fault = xc->write((%(mem_acc_type)s%(mem_acc_size)s_t)Mem,
-                    EA, 0, 0);
+            unsigned flags = 0;
+            uint64_t *res = 0;
+            switch(dataSize)
+            {
+              case 1:
+                fault = xc->write((uint8_t&)Mem, EA, flags, res);
+                break;
+              case 2:
+                fault = xc->write((uint16_t&)Mem, EA, flags, res);
+                break;
+              case 4:
+                fault = xc->write((uint32_t&)Mem, EA, flags, res);
+                break;
+              case 8:
+                fault = xc->write((uint64_t&)Mem, EA, flags, res);
+                break;
+              default:
+                panic("Bad operand size!\n");
+            }
         }
         if(fault == NoFault)
         {
@@ -382,12 +394,12 @@ def template MicroLdStOpConstructor {{
 
 let {{
     class LdStOp(X86Microop):
-        def __init__(self, data, segment, addr, disp):
+        def __init__(self, data, segment, addr, disp, dataSize):
             self.data = data
             [self.scale, self.index, self.base] = addr
             self.disp = disp
             self.segment = segment
-            self.dataSize = "env.dataSize"
+            self.dataSize = dataSize
             self.addressSize = "env.addressSize"
 
         def getAllocator(self, *microFlags):
@@ -424,7 +436,7 @@ let {{
         name = mnemonic.lower()
 
         # Build up the all register version of this micro op
-        iop = InstObjParams(name, Name, 'LdStOp',
+        iop = InstObjParams(name, Name, 'X86ISA::LdStOp',
                 {"code": code, "ea_code": calculateEA})
         header_output += MicroLdStOpDeclare.subst(iop)
         decoder_output += MicroLdStOpConstructor.subst(iop)
@@ -433,8 +445,10 @@ let {{
         exec_output += MicroLoadCompleteAcc.subst(iop)
 
         class LoadOp(LdStOp):
-            def __init__(self, data, segment, addr, disp = 0):
-                super(LoadOp, self).__init__(data, segment, addr, disp)
+            def __init__(self, data, segment, addr,
+                    disp = 0, dataSize="env.dataSize"):
+                super(LoadOp, self).__init__(data, segment,
+                        addr, disp, dataSize)
                 self.className = Name
                 self.mnemonic = name
 
@@ -451,7 +465,7 @@ let {{
         name = mnemonic.lower()
 
         # Build up the all register version of this micro op
-        iop = InstObjParams(name, Name, 'LdStOp',
+        iop = InstObjParams(name, Name, 'X86ISA::LdStOp',
                 {"code": code, "ea_code": calculateEA})
         header_output += MicroLdStOpDeclare.subst(iop)
         decoder_output += MicroLdStOpConstructor.subst(iop)
@@ -460,24 +474,28 @@ let {{
         exec_output += MicroStoreCompleteAcc.subst(iop)
 
         class StoreOp(LdStOp):
-            def __init__(self, data, segment, addr, disp = 0):
-                super(LoadOp, self).__init__(data, segment, addr, disp)
+            def __init__(self, data, segment, addr,
+                    disp = 0, dataSize="env.dataSize"):
+                super(StoreOp, self).__init__(data, segment,
+                        addr, disp, dataSize)
                 self.className = Name
                 self.mnemonic = name
 
         microopClasses[name] = StoreOp
 
-    defineMicroLoadOp('St', 'Mem = Data;')
+    defineMicroStoreOp('St', 'Mem = Data;')
 
-    iop = InstObjParams("lea", "Lea", 'LdStOp',
+    iop = InstObjParams("lea", "Lea", 'X86ISA::LdStOp',
             {"code": "Data = merge(Data, EA, dataSize);", "ea_code": calculateEA})
     header_output += MicroLeaDeclare.subst(iop)
     decoder_output += MicroLdStOpConstructor.subst(iop)
     exec_output += MicroLeaExecute.subst(iop)
 
     class LeaOp(LdStOp):
-        def __init__(self, data, segment, addr, disp = 0):
-            super(LeaOp, self).__init__(data, segment, addr, disp)
+        def __init__(self, data, segment, addr,
+                disp = 0, dataSize="env.dataSize"):
+            super(LeaOp, self).__init__(data, segment,
+                    addr, disp, dataSize)
             self.className = "Lea"
             self.mnemonic = "lea"
 
diff --git a/src/arch/x86/isa/microops/limmop.isa b/src/arch/x86/isa/microops/limmop.isa
index 141d7523f..37180d7fa 100644
--- a/src/arch/x86/isa/microops/limmop.isa
+++ b/src/arch/x86/isa/microops/limmop.isa
@@ -72,11 +72,12 @@ def template MicroLimmOpExecute {{
 }};
 
 def template MicroLimmOpDeclare {{
-    class %(class_name)s : public X86MicroopBase
+    class %(class_name)s : public X86ISA::X86MicroopBase
     {
       protected:
         const RegIndex dest;
         const uint64_t imm;
+        const uint8_t dataSize;
         void buildMe();
 
         std::string generateDisassembly(Addr pc,
@@ -86,11 +87,11 @@ def template MicroLimmOpDeclare {{
         %(class_name)s(ExtMachInst _machInst,
                 const char * instMnem,
                 bool isMicro, bool isDelayed, bool isFirst, bool isLast,
-                RegIndex _dest, uint64_t _imm);
+                RegIndex _dest, uint64_t _imm, uint8_t _dataSize);
 
         %(class_name)s(ExtMachInst _machInst,
                 const char * instMnem,
-                RegIndex _dest, uint64_t _imm);
+                RegIndex _dest, uint64_t _imm, uint8_t _dataSize);
 
         %(BasicExecDeclare)s
     };
@@ -103,7 +104,7 @@ def template MicroLimmOpDisassembly {{
         std::stringstream response;
 
         printMnemonic(response, instMnem, mnemonic);
-        printReg(response, dest);
+        printReg(response, dest, dataSize);
         response << ", ";
         ccprintf(response, "%#x", imm);
         return response.str();
@@ -119,10 +120,10 @@ def template MicroLimmOpConstructor {{
 
     inline %(class_name)s::%(class_name)s(
             ExtMachInst machInst, const char * instMnem,
-            RegIndex _dest, uint64_t _imm) :
+            RegIndex _dest, uint64_t _imm, uint8_t _dataSize) :
         %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                 false, false, false, false, %(op_class)s),
-                dest(_dest), imm(_imm)
+                dest(_dest), imm(_imm), dataSize(_dataSize)
     {
         buildMe();
     }
@@ -130,10 +131,10 @@ def template MicroLimmOpConstructor {{
     inline %(class_name)s::%(class_name)s(
             ExtMachInst machInst, const char * instMnem,
             bool isMicro, bool isDelayed, bool isFirst, bool isLast,
-            RegIndex _dest, uint64_t _imm) :
+            RegIndex _dest, uint64_t _imm, uint8_t _dataSize) :
         %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                 isMicro, isDelayed, isFirst, isLast, %(op_class)s),
-                dest(_dest), imm(_imm)
+                dest(_dest), imm(_imm), dataSize(_dataSize)
     {
         buildMe();
     }
@@ -146,14 +147,16 @@ let {{
             self.mnemonic = "limm"
             self.dest = dest
             self.imm = imm
+            self.dataSize = "env.dataSize"
 
         def getAllocator(self, *microFlags):
             allocator = '''new %(class_name)s(machInst, mnemonic
-                    %(flags)s, %(dest)s, %(imm)s)''' % {
+                    %(flags)s, %(dest)s, %(imm)s, %(dataSize)s)''' % {
                 "class_name" : self.className,
                 "mnemonic" : self.mnemonic,
                 "flags" : self.microFlagsText(microFlags),
-                "dest" : self.dest, "imm" : self.imm }
+                "dest" : self.dest, "imm" : self.imm,
+                "dataSize" : self.dataSize}
             return allocator
 
     microopClasses["limm"] = LimmOp
diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa
index 65b75fab8..dbbe11c90 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -59,100 +59,6 @@
 //
 //////////////////////////////////////////////////////////////////////////
 
-output header {{
-    /**
-     * Base classes for RegOps which provides a generateDisassembly method.
-     */
-    class RegOp : public X86MicroopBase
-    {
-      protected:
-        const RegIndex src1;
-        const RegIndex src2;
-        const RegIndex dest;
-        const bool setStatus;
-        const uint8_t dataSize;
-        const uint8_t ext;
-
-        // Constructor
-        RegOp(ExtMachInst _machInst,
-                const char *mnem, const char *_instMnem,
-                bool isMicro, bool isDelayed,
-                bool isFirst, bool isLast,
-                RegIndex _src1, RegIndex _src2, RegIndex _dest,
-                bool _setStatus, uint8_t _dataSize, uint8_t _ext,
-                OpClass __opClass) :
-            X86MicroopBase(_machInst, mnem, _instMnem,
-                    isMicro, isDelayed, isFirst, isLast,
-                    __opClass),
-            src1(_src1), src2(_src2), dest(_dest),
-            setStatus(_setStatus), dataSize(_dataSize), ext(_ext)
-        {
-        }
-
-        std::string generateDisassembly(Addr pc,
-            const SymbolTable *symtab) const;
-    };
-
-    class RegOpImm : public X86MicroopBase
-    {
-      protected:
-        const RegIndex src1;
-        const uint8_t imm8;
-        const RegIndex dest;
-        const bool setStatus;
-        const uint8_t dataSize;
-        const uint8_t ext;
-
-        // Constructor
-        RegOpImm(ExtMachInst _machInst,
-                const char * mnem, const char *_instMnem,
-                bool isMicro, bool isDelayed,
-                bool isFirst, bool isLast,
-                RegIndex _src1, uint8_t _imm8, RegIndex _dest,
-                bool _setStatus, uint8_t _dataSize, uint8_t _ext,
-                OpClass __opClass) :
-            X86MicroopBase(_machInst, mnem, _instMnem,
-                    isMicro, isDelayed, isFirst, isLast,
-                    __opClass),
-            src1(_src1), imm8(_imm8), dest(_dest),
-            setStatus(_setStatus), dataSize(_dataSize), ext(_ext)
-        {
-        }
-
-        std::string generateDisassembly(Addr pc,
-            const SymbolTable *symtab) const;
-    };
-}};
-
-output decoder {{
-    std::string RegOp::generateDisassembly(Addr pc,
-            const SymbolTable *symtab) const
-    {
-        std::stringstream response;
-
-        printMnemonic(response, instMnem, mnemonic);
-        printReg(response, dest);
-        response << ", ";
-        printReg(response, src1);
-        response << ", ";
-        printReg(response, src2);
-        return response.str();
-    }
-
-    std::string RegOpImm::generateDisassembly(Addr pc,
-            const SymbolTable *symtab) const
-    {
-        std::stringstream response;
-
-        printMnemonic(response, instMnem, mnemonic);
-        printReg(response, dest);
-        response << ", ";
-        printReg(response, src1);
-        ccprintf(response, ", %#x", imm8);
-        return response.str();
-    }
-}};
-
 def template MicroRegOpExecute {{
         Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
                 Trace::InstRecord *traceData) const
@@ -161,8 +67,16 @@ def template MicroRegOpExecute {{
 
             %(op_decl)s;
             %(op_rd)s;
-            %(code)s;
-            %(flag_code)s;
+
+            if(%(cond_check)s)
+            {
+                %(code)s;
+                %(flag_code)s;
+            }
+            else
+            {
+                %(else_code)s;
+            }
 
             //Write the resulting state to the execution context
             if(fault == NoFault)
@@ -181,8 +95,16 @@ def template MicroRegOpImmExecute {{
 
             %(op_decl)s;
             %(op_rd)s;
-            %(code)s;
-            %(flag_code)s;
+
+            if(%(cond_check)s)
+            {
+                %(code)s;
+                %(flag_code)s;
+            }
+            else
+            {
+                %(else_code)s;
+            }
 
             //Write the resulting state to the execution context
             if(fault == NoFault)
@@ -204,12 +126,12 @@ def template MicroRegOpDeclare {{
                 const char * instMnem,
                 bool isMicro, bool isDelayed, bool isFirst, bool isLast,
                 RegIndex _src1, RegIndex _src2, RegIndex _dest,
-                bool _setStatus, uint8_t _dataSize, uint8_t _ext);
+                uint8_t _dataSize, uint16_t _ext);
 
         %(class_name)s(ExtMachInst _machInst,
                 const char * instMnem,
                 RegIndex _src1, RegIndex _src2, RegIndex _dest,
-                bool _setStatus, uint8_t _dataSize, uint8_t _ext);
+                uint8_t _dataSize, uint16_t _ext);
 
         %(BasicExecDeclare)s
     };
@@ -227,12 +149,12 @@ def template MicroRegOpImmDeclare {{
                 const char * instMnem,
                 bool isMicro, bool isDelayed, bool isFirst, bool isLast,
                 RegIndex _src1, uint8_t _imm8, RegIndex _dest,
-                bool _setStatus, uint8_t _dataSize, uint8_t _ext);
+                uint8_t _dataSize, uint16_t _ext);
 
         %(class_name)sImm(ExtMachInst _machInst,
                 const char * instMnem,
                 RegIndex _src1, uint8_t _imm8, RegIndex _dest,
-                bool _setStatus, uint8_t _dataSize, uint8_t _ext);
+                uint8_t _dataSize, uint16_t _ext);
 
         %(BasicExecDeclare)s
     };
@@ -248,10 +170,10 @@ def template MicroRegOpConstructor {{
     inline %(class_name)s::%(class_name)s(
             ExtMachInst machInst, const char * instMnem,
             RegIndex _src1, RegIndex _src2, RegIndex _dest,
-            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
+            uint8_t _dataSize, uint16_t _ext) :
         %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                 false, false, false, false,
-                _src1, _src2, _dest, _setStatus, _dataSize, _ext,
+                _src1, _src2, _dest, _dataSize, _ext,
                 %(op_class)s)
     {
         buildMe();
@@ -261,10 +183,10 @@ def template MicroRegOpConstructor {{
             ExtMachInst machInst, const char * instMnem,
             bool isMicro, bool isDelayed, bool isFirst, bool isLast,
             RegIndex _src1, RegIndex _src2, RegIndex _dest,
-            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
+            uint8_t _dataSize, uint16_t _ext) :
         %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                 isMicro, isDelayed, isFirst, isLast,
-                _src1, _src2, _dest, _setStatus, _dataSize, _ext,
+                _src1, _src2, _dest, _dataSize, _ext,
                 %(op_class)s)
     {
         buildMe();
@@ -281,10 +203,10 @@ def template MicroRegOpImmConstructor {{
     inline %(class_name)sImm::%(class_name)sImm(
             ExtMachInst machInst, const char * instMnem,
             RegIndex _src1, uint8_t _imm8, RegIndex _dest,
-            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
+            uint8_t _dataSize, uint16_t _ext) :
         %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                 false, false, false, false,
-                _src1, _imm8, _dest, _setStatus, _dataSize, _ext,
+                _src1, _imm8, _dest, _dataSize, _ext,
                 %(op_class)s)
     {
         buildMe();
@@ -294,10 +216,10 @@ def template MicroRegOpImmConstructor {{
             ExtMachInst machInst, const char * instMnem,
             bool isMicro, bool isDelayed, bool isFirst, bool isLast,
             RegIndex _src1, uint8_t _imm8, RegIndex _dest,
-            bool _setStatus, uint8_t _dataSize, uint8_t _ext) :
+            uint8_t _dataSize, uint16_t _ext) :
         %(base_class)s(machInst, "%(mnemonic)s", instMnem,
                 isMicro, isDelayed, isFirst, isLast,
-                _src1, _imm8, _dest, _setStatus, _dataSize, _ext,
+                _src1, _imm8, _dest, _dataSize, _ext,
                 %(op_class)s)
     {
         buildMe();
@@ -305,46 +227,74 @@ def template MicroRegOpImmConstructor {{
 }};
 
 let {{
+    class X86MicroMeta(type):
+        def __new__(mcls, name, bases, dict):
+            abstract = False
+            if "abstract" in dict:
+                abstract = dict['abstract']
+                del dict['abstract']
+
+            cls = type.__new__(mcls, name, bases, dict)
+            if not abstract:
+                allClasses[name] = cls
+            return cls
+
+    class XXX86Microop(object):
+        __metaclass__ = X86MicroMeta
+        abstract = True
+
     class RegOp(X86Microop):
-        def __init__(self, dest, src1, src2, setStatus):
+        abstract = True
+        def __init__(self, dest, src1, src2, flags, dataSize):
             self.dest = dest
             self.src1 = src1
             self.src2 = src2
-            self.setStatus = setStatus
-            self.dataSize = "env.dataSize"
-            self.ext = 0
+            self.flags = flags
+            self.dataSize = dataSize
+            if flags is None:
+                self.ext = 0
+            else:
+                if not isinstance(flags, (list, tuple)):
+                    raise Exception, "flags must be a list or tuple of flags"
+                self.ext = " | ".join(flags)
+                self.className += "Flags"
 
         def getAllocator(self, *microFlags):
             allocator = '''new %(class_name)s(machInst, mnemonic
                     %(flags)s, %(src1)s, %(src2)s, %(dest)s,
-                    %(setStatus)s, %(dataSize)s, %(ext)s)''' % {
+                    %(dataSize)s, %(ext)s)''' % {
                 "class_name" : self.className,
                 "flags" : self.microFlagsText(microFlags),
                 "src1" : self.src1, "src2" : self.src2,
                 "dest" : self.dest,
-                "setStatus" : self.cppBool(self.setStatus),
                 "dataSize" : self.dataSize,
                 "ext" : self.ext}
             return allocator
 
     class RegOpImm(X86Microop):
-        def __init__(self, dest, src1, imm8, setStatus):
+        abstract = True
+        def __init__(self, dest, src1, imm8, flags, dataSize):
             self.dest = dest
             self.src1 = src1
             self.imm8 = imm8
-            self.setStatus = setStatus
-            self.dataSize = "env.dataSize"
-            self.ext = 0
+            self.flags = flags
+            self.dataSize = dataSize
+            if flags is None:
+                self.ext = 0
+            else:
+                if not isinstance(flags, (list, tuple)):
+                    raise Exception, "flags must be a list or tuple of flags"
+                self.ext = " | ".join(flags)
+                self.className += "Flags"
 
         def getAllocator(self, *microFlags):
             allocator = '''new %(class_name)s(machInst, mnemonic
                     %(flags)s, %(src1)s, %(imm8)s, %(dest)s,
-                    %(setStatus)s, %(dataSize)s, %(ext)s)''' % {
+                    %(dataSize)s, %(ext)s)''' % {
                 "class_name" : self.className,
                 "flags" : self.microFlagsText(microFlags),
                 "src1" : self.src1, "imm8" : self.imm8,
                 "dest" : self.dest,
-                "setStatus" : self.cppBool(self.setStatus),
                 "dataSize" : self.dataSize,
                 "ext" : self.ext}
             return allocator
@@ -358,7 +308,8 @@ let {{
     decoder_output = ""
     exec_output = ""
 
-    def setUpMicroRegOp(name, Name, base, code, child, flagCode):
+    # A function which builds the C++ classes that implement the microops
+    def setUpMicroRegOp(name, Name, base, code, flagCode = "", condCheck = "true", elseCode = ";"):
         global header_output
         global decoder_output
         global exec_output
@@ -366,14 +317,21 @@ let {{
 
         iop = InstObjParams(name, Name, base,
                 {"code" : code,
-                 "flag_code" : flagCode})
+                 "flag_code" : flagCode,
+                 "cond_check" : condCheck,
+                 "else_code" : elseCode})
         header_output += MicroRegOpDeclare.subst(iop)
         decoder_output += MicroRegOpConstructor.subst(iop)
         exec_output += MicroRegOpExecute.subst(iop)
 
-        microopClasses[name] = child
 
-    def defineMicroRegOp(mnemonic, code, flagCode):
+    checkCCFlagBits = "checkCondition(ccFlagBits)"
+    genCCFlagBits = "ccFlagBits = genFlags(ccFlagBits, ext, DestReg, SrcReg1, %s);"
+
+
+    # This creates a python representations of a microop which are a cross
+    # product of reg/immediate and flag/no flag versions.
+    def defineMicroRegOp(mnemonic, code, subtract = False, cc=False, elseCode=";"):
         Name = mnemonic
         name = mnemonic.lower()
 
@@ -384,36 +342,47 @@ let {{
         regCode = matcher.sub("SrcReg2", code)
         immCode = matcher.sub("imm8", code)
 
-        # Build the all register version of this micro op
+        if subtract:
+            secondSrc = "-op2, true"
+        else:
+            secondSrc = "op2"
+
+        if not cc:
+            flagCode = genCCFlagBits % secondSrc
+            condCode = "true"
+        else:
+            flagCode = ""
+            condCode = checkCCFlagBits
+
+        regFlagCode = matcher.sub("SrcReg2", flagCode)
+        immFlagCode = matcher.sub("imm8", flagCode)
+
         class RegOpChild(RegOp):
-            def __init__(self, dest, src1, src2, setStatus=False):
-                super(RegOpChild, self).__init__(dest, src1, src2, setStatus)
-                self.className = Name
-                self.mnemonic = name
+            mnemonic = name
+            className = Name
+            def __init__(self, dest, src1, src2, flags=None, dataSize="env.dataSize"):
+                super(RegOpChild, self).__init__(dest, src1, src2, flags, dataSize)
+
+        microopClasses[name] = RegOpChild
 
-        setUpMicroRegOp(name, Name, "RegOp", regCode, RegOpChild, flagCode);
+        setUpMicroRegOp(name, Name, "X86ISA::RegOp", regCode);
+        setUpMicroRegOp(name, Name + "Flags", "X86ISA::RegOp", regCode,
+                flagCode = regFlagCode, condCheck = condCode, elseCode = elseCode);
 
-        # Build the immediate version of this micro op
         class RegOpChildImm(RegOpImm):
-            def __init__(self, dest, src1, src2, setStatus=False):
-                super(RegOpChildImm, self).__init__(dest, src1, src2, setStatus)
-                self.className = Name + "Imm"
-                self.mnemonic = name + "i"
-
-        setUpMicroRegOp(name + "i", Name + "Imm", "RegOpImm", immCode, RegOpChildImm, flagCode);
-
-    defineMicroRegOp('Add', 'DestReg = merge(DestReg, SrcReg1 + op2, dataSize)', "") #Needs to set OF,CF,SF
-    defineMicroRegOp('Or', 'DestReg = merge(DestReg, SrcReg1 | op2, dataSize)', "")
-    defineMicroRegOp('Adc', 'DestReg = merge(DestReg, SrcReg1 + op2, dataSize)', "") #Needs to add in CF, set OF,CF,SF
-    defineMicroRegOp('Sbb', 'DestReg = merge(DestReg, SrcReg1 - op2, dataSize)', "") #Needs to subtract CF, set OF,CF,SF
-    defineMicroRegOp('And', 'DestReg = merge(DestReg, SrcReg1 & op2, dataSize)', "")
-    defineMicroRegOp('Sub', 'DestReg = merge(DestReg, SrcReg1 - op2, dataSize)', "") #Needs to set OF,CF,SF
-    defineMicroRegOp('Xor', 'DestReg = merge(DestReg, SrcReg1 ^ op2, dataSize)', "")
-    defineMicroRegOp('Cmp', 'DestReg = merge(DestReg, DestReg - op2, dataSize)', "") #Needs to set OF,CF,SF and not DestReg
-    defineMicroRegOp('Mov', 'DestReg = merge(SrcReg1, op2, dataSize)', "")
+            mnemonic = name + 'i'
+            className = Name + 'Imm'
+            def __init__(self, dest, src1, src2, flags=None, dataSize="env.dataSize"):
+                super(RegOpChildImm, self).__init__(dest, src1, src2, flags, dataSize)
+
+        microopClasses[name + 'i'] = RegOpChildImm
+
+        setUpMicroRegOp(name + "i", Name + "Imm", "X86ISA::RegOpImm", immCode);
+        setUpMicroRegOp(name + "i", Name + "ImmFlags", "X86ISA::RegOpImm", immCode,
+                flagCode = immFlagCode, condCheck = condCode, elseCode = elseCode);
 
     # This has it's own function because Wr ops have implicit destinations
-    def defineMicroRegOpWr(mnemonic, code):
+    def defineMicroRegOpWr(mnemonic, code, elseCode=";"):
         Name = mnemonic
         name = mnemonic.lower()
 
@@ -424,25 +393,29 @@ let {{
         regCode = matcher.sub("SrcReg2", code)
         immCode = matcher.sub("imm8", code)
 
-        # Build the all register version of this micro op
         class RegOpChild(RegOp):
-            def __init__(self, src1, src2):
-                super(RegOpChild, self).__init__("NUM_INTREGS", src1, src2, False)
-                self.className = Name
-                self.mnemonic = name
+            mnemonic = name
+            className = Name
+            def __init__(self, src1, src2, flags=None, dataSize="env.dataSize"):
+                super(RegOpChild, self).__init__("NUM_INTREGS", src1, src2, flags, dataSize)
+
+        microopClasses[name] = RegOpChild
 
-        setUpMicroRegOp(name, Name, "RegOp", regCode, RegOpChild, "");
+        setUpMicroRegOp(name, Name, "X86ISA::RegOp", regCode);
+        setUpMicroRegOp(name, Name + "Flags", "X86ISA::RegOp", regCode,
+                condCheck = checkCCFlagBits, elseCode = elseCode);
 
-        # Build the immediate version of this micro op
         class RegOpChildImm(RegOpImm):
-            def __init__(self, src1, src2):
-                super(RegOpChildImm, self).__init__("NUM_INTREGS", src1, src2, False)
-                self.className = Name + "Imm"
-                self.mnemonic = name + "i"
+            mnemonic = name + 'i'
+            className = Name + 'Imm'
+            def __init__(self, src1, src2, flags=None, dataSize="env.dataSize"):
+                super(RegOpChildImm, self).__init__("NUM_INTREGS", src1, src2, flags, dataSize)
 
-        setUpMicroRegOp(name + "i", Name + "Imm", "RegOpImm", immCode, RegOpChildImm, "");
+        microopClasses[name + 'i'] = RegOpChildImm
 
-    defineMicroRegOpWr('Wrip', 'RIP = SrcReg1 + op2')
+        setUpMicroRegOp(name + 'i', Name + "Imm", "X86ISA::RegOpImm", immCode);
+        setUpMicroRegOp(name + 'i', Name + "ImmFlags", "X86ISA::RegOpImm", immCode,
+                condCheck = checkCCFlagBits, elseCode = elseCode);
 
     # This has it's own function because Rd ops don't always have two parameters
     def defineMicroRegOpRd(mnemonic, code):
@@ -450,30 +423,136 @@ let {{
         name = mnemonic.lower()
 
         class RegOpChild(RegOp):
-            def __init__(self, dest, src1 = "NUM_INTREGS"):
-                super(RegOpChild, self).__init__(dest, src1, "NUM_INTREGS", False)
+            def __init__(self, dest, src1 = "NUM_INTREGS", dataSize="env.dataSize"):
+                super(RegOpChild, self).__init__(dest, src1, "NUM_INTREGS", None, dataSize)
                 self.className = Name
                 self.mnemonic = name
 
-        setUpMicroRegOp(name, Name, "RegOp", code, RegOpChild, "");
+        microopClasses[name] = RegOpChild
 
-    defineMicroRegOpRd('Rdip', 'DestReg = RIP')
+        setUpMicroRegOp(name, Name, "X86ISA::RegOp", code);
 
     def defineMicroRegOpImm(mnemonic, code):
         Name = mnemonic
         name = mnemonic.lower()
 
         class RegOpChild(RegOpImm):
-            def __init__(self, dest, src1, src2):
-                super(RegOpChild, self).__init__(dest, src1, src2, False)
+            def __init__(self, dest, src1, src2, dataSize="env.dataSize"):
+                super(RegOpChild, self).__init__(dest, src1, src2, None, dataSize)
                 self.className = Name
                 self.mnemonic = name
 
-        setUpMicroRegOp(name, Name, "RegOpImm", code, RegOpChild, "");
+        microopClasses[name] = RegOpChild
+
+        setUpMicroRegOp(name, Name, "X86ISA::RegOpImm", code);
+
+    defineMicroRegOp('Add', 'DestReg = merge(DestReg, SrcReg1 + op2, dataSize)')
+    defineMicroRegOp('Or', 'DestReg = merge(DestReg, SrcReg1 | op2, dataSize)')
+    defineMicroRegOp('Adc', '''
+            CCFlagBits flags = ccFlagBits;
+            DestReg = merge(DestReg, SrcReg1 + op2 + flags.CF, dataSize);
+            ''')
+    defineMicroRegOp('Sbb', '''
+            CCFlagBits flags = ccFlagBits;
+            DestReg = merge(DestReg, SrcReg1 - op2 - flags.CF, dataSize);
+            ''', True)
+    defineMicroRegOp('And', 'DestReg = merge(DestReg, SrcReg1 & op2, dataSize)')
+    defineMicroRegOp('Sub', 'DestReg = merge(DestReg, SrcReg1 - op2, dataSize)', True)
+    defineMicroRegOp('Xor', 'DestReg = merge(DestReg, SrcReg1 ^ op2, dataSize)')
+    # defineMicroRegOp('Cmp', 'DestReg = merge(DestReg, DestReg - op2, dataSize)', True)
+    defineMicroRegOp('Mul1s', 'DestReg = merge(DestReg, DestReg * op2, dataSize)')
+    defineMicroRegOp('Mov', 'DestReg = merge(SrcReg1, op2, dataSize)',
+            elseCode='DestReg=DestReg;', cc=True)
+
+    # Shift instructions
+    defineMicroRegOp('Sll', '''
+            uint8_t shiftAmt = (op2 & ((dataSize == 8) ? mask(4) : mask(3)));
+            DestReg = merge(DestReg, SrcReg1 << shiftAmt, dataSize);
+            ''')
+    defineMicroRegOp('Srl', '''
+            uint8_t shiftAmt = (op2 & ((dataSize == 8) ? mask(4) : mask(3)));
+            // Because what happens to the bits shift -in- on a right shift
+            // is not defined in the C/C++ standard, we have to mask them out
+            // to be sure they're zero.
+            uint64_t logicalMask = mask(dataSize * 8 - shiftAmt);
+            DestReg = merge(DestReg, (SrcReg1 >> shiftAmt) & logicalMask, dataSize);
+            ''')
+    defineMicroRegOp('Sra', '''
+            uint8_t shiftAmt = (op2 & ((dataSize == 8) ? mask(4) : mask(3)));
+            // Because what happens to the bits shift -in- on a right shift
+            // is not defined in the C/C++ standard, we have to sign extend
+            // them manually to be sure.
+            uint64_t arithMask =
+                -bits(op2, dataSize * 8 - 1) << (dataSize * 8 - shiftAmt);
+            DestReg = merge(DestReg, (SrcReg1 >> shiftAmt) | arithMask, dataSize);
+            ''')
+    defineMicroRegOp('Ror', '''
+            uint8_t shiftAmt =
+                (op2 & ((dataSize == 8) ? mask(4) : mask(3)));
+            if(shiftAmt)
+            {
+                uint64_t top = SrcReg1 << (dataSize * 8 - shiftAmt);
+                uint64_t bottom = bits(SrcReg1, dataSize * 8, shiftAmt);
+                DestReg = merge(DestReg, top | bottom, dataSize);
+            }
+            else
+                DestReg = DestReg;
+            ''')
+    defineMicroRegOp('Rcr', '''
+            uint8_t shiftAmt =
+                (op2 & ((dataSize == 8) ? mask(4) : mask(3)));
+            if(shiftAmt)
+            {
+                CCFlagBits flags = ccFlagBits;
+                uint64_t top = flags.CF << (dataSize * 8 - shiftAmt);
+                if(shiftAmt > 1)
+                    top |= SrcReg1 << (dataSize * 8 - shiftAmt - 1);
+                uint64_t bottom = bits(SrcReg1, dataSize * 8, shiftAmt);
+                DestReg = merge(DestReg, top | bottom, dataSize);
+            }
+            else
+                DestReg = DestReg;
+            ''')
+    defineMicroRegOp('Rol', '''
+            uint8_t shiftAmt =
+                (op2 & ((dataSize == 8) ? mask(4) : mask(3)));
+            if(shiftAmt)
+            {
+                uint64_t top = SrcReg1 << shiftAmt;
+                uint64_t bottom =
+                    bits(SrcReg1, dataSize * 8 - 1, dataSize * 8 - shiftAmt);
+                DestReg = merge(DestReg, top | bottom, dataSize);
+            }
+            else
+                DestReg = DestReg;
+            ''')
+    defineMicroRegOp('Rcl', '''
+            uint8_t shiftAmt =
+                (op2 & ((dataSize == 8) ? mask(4) : mask(3)));
+            if(shiftAmt)
+            {
+                CCFlagBits flags = ccFlagBits;
+                uint64_t top = SrcReg1 << shiftAmt;
+                uint64_t bottom = flags.CF << (shiftAmt - 1);
+                if(shiftAmt > 1)
+                    bottom |=
+                        bits(SrcReg1, dataSize * 8 - 1,
+                                      dataSize * 8 - shiftAmt + 1);
+                DestReg = merge(DestReg, top | bottom, dataSize);
+            }
+            else
+                DestReg = DestReg;
+            ''')
+
+    defineMicroRegOpWr('Wrip', 'RIP = SrcReg1 + op2', elseCode="RIP = RIP;")
+
+    defineMicroRegOpRd('Rdip', 'DestReg = RIP')
 
     defineMicroRegOpImm('Sext', '''
             IntReg val = SrcReg1;
             int sign_bit = bits(val, imm8-1, imm8-1);
             val = sign_bit ? (val | ~mask(imm8)) : val;
             DestReg = merge(DestReg, val, dataSize);''')
+
+    defineMicroRegOpImm('Zext', 'DestReg = bits(SrcReg1, imm8-1, 0);')
 }};
diff --git a/src/arch/x86/isa/microops/specop.isa b/src/arch/x86/isa/microops/specop.isa
index b56223390..5c9e8dda9 100644
--- a/src/arch/x86/isa/microops/specop.isa
+++ b/src/arch/x86/isa/microops/specop.isa
@@ -60,7 +60,7 @@
 //////////////////////////////////////////////////////////////////////////
 
 output header {{
-    class MicroFault : public X86MicroopBase
+    class MicroFault : public X86ISA::X86MicroopBase
     {
       protected:
         Fault fault;
@@ -75,6 +75,9 @@ output header {{
                 Fault _fault);
 
         %(BasicExecDeclare)s
+
+        std::string generateDisassembly(Addr pc,
+                const SymbolTable *symtab) const;
     };
 }};
 
@@ -106,6 +109,22 @@ output decoder {{
     }
 }};
 
+output decoder {{
+    std::string MicroFault::generateDisassembly(Addr pc,
+            const SymbolTable *symtab) const
+    {
+        std::stringstream response;
+
+        printMnemonic(response, instMnem, mnemonic);
+        if(fault)
+            response << fault->name();
+        else
+            response << "No Fault";
+
+        return response.str();
+    }
+}};
+
 let {{
     class Fault(X86Microop):
         def __init__(self, fault):
diff --git a/src/arch/x86/isa/operands.isa b/src/arch/x86/isa/operands.isa
index b2ac17d66..406c74a1f 100644
--- a/src/arch/x86/isa/operands.isa
+++ b/src/arch/x86/isa/operands.isa
@@ -102,6 +102,8 @@ def operands {{
         'Base':          ('IntReg', 'uqw', 'base', 'IsInteger', 4),
         'Index':         ('IntReg', 'uqw', 'index', 'IsInteger', 5),
         'Data':          ('IntReg', 'uqw', 'data', 'IsInteger', 6),
+        'rax':           ('IntReg', 'uqw', 'INTREG_RAX', 'IsInteger', 7),
         'RIP':           ('NPC', 'uqw', None, (None, None, 'IsControl'), 10),
+        'ccFlagBits':       ('IntReg', 'uqw', 'NUM_INTREGS + NumMicroIntRegs', None, 20),
         'Mem':           ('Mem', 'uqw', None, ('IsMemRef', 'IsLoad', 'IsStore'), 100)
 }};
diff --git a/src/arch/x86/isa/outputblock.isa b/src/arch/x86/isa/outputblock.isa
new file mode 100644
index 000000000..342d6ac4b
--- /dev/null
+++ b/src/arch/x86/isa/outputblock.isa
@@ -0,0 +1,91 @@
+// Copyright (c) 2007 The Hewlett-Packard Development Company
+// All rights reserved.
+//
+// Redistribution and use of this software in source and binary forms,
+// with or without modification, are permitted provided that the
+// following conditions are met:
+//
+// The software must be used only for Non-Commercial Use which means any
+// use which is NOT directed to receiving any direct monetary
+// compensation for, or commercial advantage from such use.  Illustrative
+// examples of non-commercial use are academic research, personal study,
+// teaching, education and corporate research & development.
+// Illustrative examples of commercial use are distributing products for
+// commercial advantage and providing services using the software for
+// commercial advantage.
+//
+// If you wish to use this software or functionality therein that may be
+// covered by patents for commercial use, please contact:
+//     Director of Intellectual Property Licensing
+//     Office of Strategy and Technology
+//     Hewlett-Packard Company
+//     1501 Page Mill Road
+//     Palo Alto, California  94304
+//
+// Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.  Redistributions
+// in binary form must reproduce the above copyright notice, this list of
+// conditions and the following disclaimer in the documentation and/or
+// other materials provided with the distribution.  Neither the name of
+// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.  No right of
+// sublicense is granted herewith.  Derivatives of the software and
+// output created using the software may be prepared, but only for
+// Non-Commercial Uses.  Derivatives of the software may be shared with
+// others provided: (i) the others agree to abide by the list of
+// conditions herein which includes the Non-Commercial Use restrictions;
+// and (ii) such Derivatives of the software include the above copyright
+// notice to acknowledge the contribution from this software where
+// applicable, this list of conditions and the disclaimer below.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Authors: Gabe Black
+
+////////////////////////////////////////////////////////////////////
+//
+// Output blocks which group together code generated by the parser.
+//
+
+let {{
+    # This class will help make dealing with output a little less verbose
+    class OutputBlocks(object):
+        def __init__(self, header_output="",
+                           decoder_output="",
+                           decode_block="",
+                           exec_output=""):
+            self.header_output = header_output
+            self.decoder_output = decoder_output
+            self.decode_block = decode_block
+            self.exec_output = exec_output
+
+        def append(self, blocks):
+            if isinstance(blocks, list) or isinstance(blocks, tuple):
+                assert(len(blocks) == 4)
+                self.header_output += blocks[0]
+                self.decoder_output += blocks[1]
+                self.decode_block += blocks[2]
+                self.exec_output += blocks[3]
+            else:
+                self.header_output += blocks.header_output
+                self.decoder_output += blocks.decoder_output
+                self.decode_block += blocks.decode_block
+                self.exec_output += blocks.exec_output
+
+        def makeList(self):
+            return (self.header_output,
+                    self.decoder_output,
+                    self.decode_block,
+                    self.exec_output)
+}};
diff --git a/src/arch/x86/isa/specialize.isa b/src/arch/x86/isa/specialize.isa
index 3183f32ba..5165ea206 100644
--- a/src/arch/x86/isa/specialize.isa
+++ b/src/arch/x86/isa/specialize.isa
@@ -118,6 +118,7 @@ let {{
 
     ModRMRegIndex = "(MODRM_REG | (REX_R << 3))"
     ModRMRMIndex = "(MODRM_RM | (REX_B << 3))"
+    InstRegIndex = "(OPCODE_OP_BOTTOM3 | (REX_B << 3))"
 
     # This function specializes the given piece of code to use a particular
     # set of argument types described by "opTypes".
@@ -143,6 +144,10 @@ let {{
                     else:
                         print "Didn't recognize fixed register size %s!" % opType.rsize
                 Name += "_R"
+            elif opType.tag == "B":
+                # This refers to registers whose index is encoded as part of the opcode
+                Name += "_R"
+                env.addReg(InstRegIndex)
             elif opType.tag == "M":
                 # This refers to memory. The macroop constructor sets up modrm
                 # addressing. Non memory modrm settings should cause an error.
diff --git a/src/arch/x86/linux/syscalls.cc b/src/arch/x86/linux/syscalls.cc
index 809784635..30360e602 100644
--- a/src/arch/x86/linux/syscalls.cc
+++ b/src/arch/x86/linux/syscalls.cc
@@ -56,6 +56,7 @@
  */
 
 #include "arch/x86/linux/process.hh"
+#include "arch/x86/linux/linux.hh"
 #include "kern/linux/linux.hh"
 #include "sim/syscall_emul.hh"
 
@@ -82,7 +83,7 @@ unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 SyscallDesc X86LinuxProcess::syscallDescs[] = {
     /*   0 */ SyscallDesc("read", unimplementedFunc),
     /*   1 */ SyscallDesc("write", unimplementedFunc),
-    /*   2 */ SyscallDesc("open", unimplementedFunc),
+    /*   2 */ SyscallDesc("open", openFunc<X86Linux>),
     /*   3 */ SyscallDesc("close", unimplementedFunc),
     /*   4 */ SyscallDesc("stat", unimplementedFunc),
     /*   5 */ SyscallDesc("fstat", unimplementedFunc),
diff --git a/src/arch/x86/miscregfile.cc b/src/arch/x86/miscregfile.cc
index 14ba3c7cc..9d8e94061 100644
--- a/src/arch/x86/miscregfile.cc
+++ b/src/arch/x86/miscregfile.cc
@@ -86,6 +86,7 @@
  */
 
 #include "arch/x86/miscregfile.hh"
+#include "sim/serialize.hh"
 
 using namespace X86ISA;
 using namespace std;
@@ -105,31 +106,65 @@ void MiscRegFile::clear()
 
 MiscReg MiscRegFile::readRegNoEffect(int miscReg)
 {
-    panic("No misc registers in x86 yet!\n");
+    switch(miscReg)
+    {
+      case MISCREG_CR1:
+      case MISCREG_CR5:
+      case MISCREG_CR6:
+      case MISCREG_CR7:
+      case MISCREG_CR9:
+      case MISCREG_CR10:
+      case MISCREG_CR11:
+      case MISCREG_CR12:
+      case MISCREG_CR13:
+      case MISCREG_CR14:
+      case MISCREG_CR15:
+        panic("Tried to read invalid control register %d\n", miscReg);
+        break;
+    }
+    return regVal[miscReg];
 }
 
 MiscReg MiscRegFile::readReg(int miscReg, ThreadContext * tc)
 {
-    panic("No misc registers in x86 yet!\n");
+    warn("No miscreg effects implemented yet!\n");
+    return readRegNoEffect(miscReg);
 }
 
 void MiscRegFile::setRegNoEffect(int miscReg, const MiscReg &val)
 {
-    panic("No misc registers in x86 yet!\n");
+    switch(miscReg)
+    {
+      case MISCREG_CR1:
+      case MISCREG_CR5:
+      case MISCREG_CR6:
+      case MISCREG_CR7:
+      case MISCREG_CR9:
+      case MISCREG_CR10:
+      case MISCREG_CR11:
+      case MISCREG_CR12:
+      case MISCREG_CR13:
+      case MISCREG_CR14:
+      case MISCREG_CR15:
+        panic("Tried to write invalid control register %d\n", miscReg);
+        break;
+    }
+    regVal[miscReg] = val;
 }
 
 void MiscRegFile::setReg(int miscReg,
         const MiscReg &val, ThreadContext * tc)
 {
-    panic("No misc registers in x86 yet!\n");
+    warn("No miscreg effects implemented yet!\n");
+    setRegNoEffect(miscReg, val);
 }
 
 void MiscRegFile::serialize(std::ostream & os)
 {
-    panic("No misc registers in x86 yet!\n");
+    SERIALIZE_ARRAY(regVal, NumMiscRegs);
 }
 
 void MiscRegFile::unserialize(Checkpoint * cp, const std::string & section)
 {
-    panic("No misc registers in x86 yet!\n");
+    UNSERIALIZE_ARRAY(regVal, NumMiscRegs);
 }
diff --git a/src/arch/x86/miscregfile.hh b/src/arch/x86/miscregfile.hh
index 10acb97a4..e095e06e9 100644
--- a/src/arch/x86/miscregfile.hh
+++ b/src/arch/x86/miscregfile.hh
@@ -89,6 +89,7 @@
 #define __ARCH_X86_MISCREGFILE_HH__
 
 #include "arch/x86/faults.hh"
+#include "arch/x86/miscregs.hh"
 #include "arch/x86/types.hh"
 
 #include <string>
@@ -100,11 +101,14 @@ namespace X86ISA
     std::string getMiscRegName(RegIndex);
 
     //These will have to be updated in the future.
-    const int NumMiscArchRegs = 0;
-    const int NumMiscRegs = 0;
+    const int NumMiscArchRegs = NUM_MISCREGS;
+    const int NumMiscRegs = NUM_MISCREGS;
 
     class MiscRegFile
     {
+      protected:
+        MiscReg regVal[NumMiscRegs];
+
       public:
         void clear();
 
diff --git a/src/arch/x86/miscregs.hh b/src/arch/x86/miscregs.hh
new file mode 100644
index 000000000..39425fc9d
--- /dev/null
+++ b/src/arch/x86/miscregs.hh
@@ -0,0 +1,329 @@
+/*
+ * Copyright (c) 2007 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.  Redistributions
+ * in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  Neither the name of
+ * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_X86_MISCREGS_HH__
+#define __ARCH_X86_MISCREGS_HH__
+
+#include "base/bitunion.hh"
+
+namespace X86ISA
+{
+    enum CondFlagBit {
+        CFBit = 1 << 0,
+        PFBit = 1 << 2,
+        ECFBit = 1 << 3,
+        AFBit = 1 << 4,
+        EZFBit = 1 << 5,
+        ZFBit = 1 << 6,
+        SFBit = 1 << 7,
+        OFBit = 1 << 11
+    };
+
+    enum MiscRegIndex
+    {
+        // Control registers
+        // Most of these are invalid.
+        MISCREG_CR0,
+        MISCREG_CR1,
+        MISCREG_CR2,
+        MISCREG_CR3,
+        MISCREG_CR4,
+        MISCREG_CR5,
+        MISCREG_CR6,
+        MISCREG_CR7,
+        MISCREG_CR8,
+        MISCREG_CR9,
+        MISCREG_CR10,
+        MISCREG_CR11,
+        MISCREG_CR12,
+        MISCREG_CR13,
+        MISCREG_CR14,
+        MISCREG_CR15,
+
+        // Debug registers
+        MISCREG_DR0,
+        MISCREG_DR1,
+        MISCREG_DR2,
+        MISCREG_DR3,
+        MISCREG_DR4,
+        MISCREG_DR5,
+        MISCREG_DR6,
+        MISCREG_DR7,
+
+        // Flags register
+        MISCREG_RFLAGS,
+
+        // Segment selectors
+        MISCREG_ES,
+        MISCREG_CS,
+        MISCREG_SS,
+        MISCREG_DS,
+        MISCREG_FS,
+        MISCREG_GS,
+
+        // Hidden segment base field
+        MISCREG_ES_BASE,
+        MISCREG_CS_BASE,
+        MISCREG_SS_BASE,
+        MISCREG_DS_BASE,
+        MISCREG_FS_BASE,
+        MISCREG_GS_BASE,
+
+        // Hidden segment limit field
+        MISCREG_ES_LIMIT,
+        MISCREG_CS_LIMIT,
+        MISCREG_SS_LIMIT,
+        MISCREG_DS_LIMIT,
+        MISCREG_FS_LIMIT,
+        MISCREG_GS_LIMIT,
+
+        // Hidden segment limit attributes
+        MISCREG_ES_ATTR,
+        MISCREG_CS_ATTR,
+        MISCREG_SS_ATTR,
+        MISCREG_DS_ATTR,
+        MISCREG_FS_ATTR,
+        MISCREG_GS_ATTR,
+
+        // System segment selectors
+        MISCREG_LDTR,
+        MISCREG_TR,
+
+        // Hidden system segment base field
+        MISCREG_LDTR_BASE,
+        MISCREG_TR_BASE,
+        MISCREG_GDTR_BASE,
+        MISCREG_IDTR_BASE,
+
+        // Hidden system segment limit field
+        MISCREG_LDTR_LIMIT,
+        MISCREG_TR_LIMIT,
+        MISCREG_GDTR_LIMIT,
+        MISCREG_IDTR_LIMIT,
+
+        // Hidden system segment attribute field
+        MISCREG_LDTR_ATTR,
+        MISCREG_TR_ATTR,
+
+        //XXX Add "Model-Specific Registers"
+
+        NUM_MISCREGS
+    };
+
+    /**
+     * A type to describe the condition code bits of the RFLAGS register,
+     * plus two flags, EZF and ECF, which are only visible to microcode.
+     */
+    BitUnion64(CCFlagBits)
+        Bitfield<11> OF;
+        Bitfield<7> SF;
+        Bitfield<6> ZF;
+        Bitfield<5> EZF;
+        Bitfield<4> AF;
+        Bitfield<3> ECF;
+        Bitfield<2> PF;
+        Bitfield<0> CF;
+    EndBitUnion(CCFlagBits)
+
+    /**
+     * RFLAGS
+     */
+    BitUnion64(RFLAGS)
+        Bitfield<21> ID; // ID Flag
+        Bitfield<20> VIP; // Virtual Interrupt Pending
+        Bitfield<19> VIF; // Virtual Interrupt Flag
+        Bitfield<18> AC; // Alignment Check
+        Bitfield<17> VM; // Virtual-8086 Mode
+        Bitfield<16> RF; // Resume Flag
+        Bitfield<14> NT; // Nested Task
+        Bitfield<13, 12> IOPL; // I/O Privilege Level
+        Bitfield<11> OF; // Overflow Flag
+        Bitfield<10> DF; // Direction Flag
+        Bitfield<9> IF; // Interrupt Flag
+        Bitfield<8> TF; // Trap Flag
+        Bitfield<7> SF; // Sign Flag
+        Bitfield<6> ZF; // Zero Flag
+        Bitfield<4> AF; // Auxiliary Flag
+        Bitfield<2> PF; // Parity Flag
+        Bitfield<0> CF; // Carry Flag
+    EndBitUnion(RFLAGS)
+
+    /**
+     * Control registers
+     */
+    BitUnion64(CR0)
+        Bitfield<31> PG; // Paging
+        Bitfield<30> CD; // Cache Disable
+        Bitfield<29> NW; // Not Writethrough
+        Bitfield<18> AM; // Alignment Mask
+        Bitfield<16> WP; // Write Protect
+        Bitfield<5> NE; // Numeric Error
+        Bitfield<4> ET; // Extension Type
+        Bitfield<3> TS; // Task Switched
+        Bitfield<2> EM; // Emulation
+        Bitfield<1> MP; // Monitor Coprocessor
+        Bitfield<0> PE; // Protection Enabled
+    EndBitUnion(CR0)
+
+    // Page Fault Virtual Address
+    BitUnion64(CR2)
+        Bitfield<31, 0> legacy;
+    EndBitUnion(CR2)
+
+    BitUnion64(CR3)
+        Bitfield<51, 12> longPDTB; // Long Mode Page-Directory-Table
+                                   // Base Address
+        Bitfield<31, 12> PDTB; // Non-PAE Addressing Page-Directory-Table
+                               // Base Address
+        Bitfield<31, 5> PAEPDTB; // PAE Addressing Page-Directory-Table
+                                 // Base Address
+        Bitfield<4> PCD; // Page-Level Cache Disable
+        Bitfield<3> PWT; // Page-Level Writethrough
+    EndBitUnion(CR3)
+
+    BitUnion64(CR4)
+        Bitfield<10> OSXMMEXCPT; // Operating System Unmasked
+                                 // Exception Support
+        Bitfield<9> OSFXSR; // Operating System FXSave/FSRSTOR Support
+        Bitfield<8> PCE; // Performance-Monitoring Counter Enable
+        Bitfield<7> PGE; // Page-Global Enable
+        Bitfield<6> MCE; // Machine Check Enable
+        Bitfield<5> PAE; // Physical-Address Extension
+        Bitfield<4> PSE; // Page Size Extensions
+        Bitfield<3> DE; // Debugging Extensions
+        Bitfield<2> TSD; // Time Stamp Disable
+        Bitfield<1> PVI; // Protected-Mode Virtual Interrupts
+        Bitfield<0> VME; // Virtual-8086 Mode Extensions
+    EndBitUnion(CR4)
+
+    BitUnion64(CR8)
+        Bitfield<3, 0> TPR; // Task Priority Register
+    EndBitUnion(CR4)
+
+    /**
+     * Segment Selector
+     */
+    BitUnion64(SegSelector)
+        Bitfield<15, 3> SI; // Selector Index
+        Bitfield<2> TI; // Table Indicator
+        Bitfield<1, 0> RPL; // Requestor Privilege Level
+    EndBitUnion(SegSelector)
+
+    /**
+     * Segment Descriptors
+     */
+
+    BitUnion64(SegDescriptor)
+        Bitfield<63, 56> baseHigh;
+        Bitfield<39, 16> baseLow;
+        Bitfield<55> G; // Granularity
+        Bitfield<54> D; // Default Operand Size
+        Bitfield<54> B; // Default Operand Size
+        Bitfield<53> L; // Long Attribute Bit
+        Bitfield<52> AVL; // Available To Software
+        Bitfield<51, 48> limitHigh;
+        Bitfield<15, 0> limitLow;
+        Bitfield<47> P; // Present
+        Bitfield<46, 45> DPL; // Descriptor Privilege-Level
+        Bitfield<44> S; // System
+        SubBitUnion(type, 43, 40)
+            // Specifies whether this descriptor is for code or data.
+            Bitfield<43> codeOrData;
+
+            // These bit fields are for code segments
+            Bitfield<42> C; // Conforming
+            Bitfield<41> R; // Readable
+
+            // These bit fields are for data segments
+            Bitfield<42> E; // Expand-Down
+            Bitfield<41> W; // Writable
+
+            // This is used for both code and data segments.
+            Bitfield<40> A; // Accessed
+        EndSubBitUnion(type)
+    EndBitUnion(SegDescriptor)
+
+    BitUnion64(GateDescriptor)
+        Bitfield<63, 48> offsetHigh; // Target Code-Segment Offset
+        Bitfield<15, 0> offsetLow; // Target Code-Segment Offset
+        Bitfield<31, 16> selector; // Target Code-Segment Selector
+        Bitfield<47> P; // Present
+        Bitfield<46, 45> DPL; // Descriptor Privilege-Level
+        Bitfield<43, 40> type;
+        Bitfield<36, 32> count; // Parameter Count
+    EndBitUnion(GateDescriptor)
+
+    /**
+     * Descriptor-Table Registers
+     */
+    BitUnion64(GDTR)
+    EndBitUnion(GDTR)
+
+    BitUnion64(IDTR)
+    EndBitUnion(IDTR)
+
+    BitUnion64(LDTR)
+    EndBitUnion(LDTR)
+
+    /**
+     * Task Register
+     */
+    BitUnion64(TR)
+    EndBitUnion(TR)
+};
+
+#endif // __ARCH_X86_INTREGS_HH__
diff --git a/src/arch/x86/predecoder.cc b/src/arch/x86/predecoder.cc
index 49f76699b..295ca10a4 100644
--- a/src/arch/x86/predecoder.cc
+++ b/src/arch/x86/predecoder.cc
@@ -72,7 +72,6 @@ namespace X86ISA
 
         immediateCollected = 0;
         emi.immediate = 0;
-        displacementCollected = 0;
         emi.displacement = 0;
 
         emi.modRM = 0;
@@ -235,14 +234,42 @@ namespace X86ISA
                     logOpSize = 1; // 16 bit operand size
             }
 
+            //Set the actual op size
+            emi.opSize = 1 << logOpSize;
+
+            //Figure out the effective address size. This can be overriden to
+            //a fixed value at the decoder level.
+            int logAddrSize;
+            if(/*FIXME 64-bit mode*/1)
+            {
+                if(emi.legacy.addr)
+                    logAddrSize = 2; // 32 bit address size
+                else
+                    logAddrSize = 3; // 64 bit address size
+            }
+            else if(/*FIXME default 32*/1)
+            {
+                if(emi.legacy.addr)
+                    logAddrSize = 1; // 16 bit address size
+                else
+                    logAddrSize = 2; // 32 bit address size
+            }
+            else // 16 bit default operand size
+            {
+                if(emi.legacy.addr)
+                    logAddrSize = 2; // 32 bit address size
+                else
+                    logAddrSize = 1; // 16 bit address size
+            }
+
+            //Set the actual address size
+            emi.addrSize = 1 << logAddrSize;
+
             //Figure out how big of an immediate we'll retreive based
             //on the opcode.
             int immType = ImmediateType[emi.opcode.num - 1][nextByte];
             immediateSize = SizeTypeToSize[logOpSize - 1][immType];
 
-            //Set the actual op size
-            emi.opSize = 1 << logOpSize;
-
             //Determine what to expect next
             if (UsesModRM[emi.opcode.num - 1][nextByte]) {
                 nextState = ModRMState;
@@ -277,8 +304,7 @@ namespace X86ISA
                 displacementSize = 0;
         } else {
             //figure out 32/64 bit displacement size
-            if(modRM.mod == 0 && (modRM.rm == 4 || modRM.rm == 5)
-                    || modRM.mod == 2)
+            if(modRM.mod == 0 && modRM.rm == 5 || modRM.mod == 2)
                 displacementSize = 4;
             else if(modRM.mod == 1)
                 displacementSize = 1;
@@ -313,6 +339,8 @@ namespace X86ISA
         emi.sib = nextByte;
         DPRINTF(Predecoder, "Found SIB byte %#x.\n", nextByte);
         consumeByte();
+        if(emi.modRM.mod == 0 && emi.sib.base == 5)
+            displacementSize = 4;
         if(displacementSize) {
             nextState = DisplacementState;
         } else if(immediateSize) {
@@ -330,14 +358,16 @@ namespace X86ISA
     {
         State nextState = ErrorState;
 
-        getImmediate(displacementCollected,
+        getImmediate(immediateCollected,
                 emi.displacement,
                 displacementSize);
 
         DPRINTF(Predecoder, "Collecting %d byte displacement, got %d bytes.\n",
-                displacementSize, displacementCollected);
+                displacementSize, immediateCollected);
 
-        if(displacementSize == displacementCollected) {
+        if(displacementSize == immediateCollected) {
+            //Reset this for other immediates.
+            immediateCollected = 0;
             //Sign extend the displacement
             switch(displacementSize)
             {
@@ -382,6 +412,9 @@ namespace X86ISA
 
         if(immediateSize == immediateCollected)
         {
+            //Reset this for other immediates.
+            immediateCollected = 0;
+
             //XXX Warning! The following is an observed pattern and might
             //not always be true!
 
diff --git a/src/arch/x86/predecoder.hh b/src/arch/x86/predecoder.hh
index f34b66364..450ebd79b 100644
--- a/src/arch/x86/predecoder.hh
+++ b/src/arch/x86/predecoder.hh
@@ -106,13 +106,13 @@ namespace X86ISA
             toGet = toGet > remaining ? remaining : toGet;
 
             //Shift the bytes we want to be all the way to the right
-            uint64_t partialDisp = fetchChunk >> (offset * 8);
+            uint64_t partialImm = fetchChunk >> (offset * 8);
             //Mask off what we don't want
-            partialDisp &= mask(toGet * 8);
+            partialImm &= mask(toGet * 8);
             //Shift it over to overlay with our displacement.
-            partialDisp <<= (displacementCollected * 8);
+            partialImm <<= (immediateCollected * 8);
             //Put it into our displacement
-            current |= partialDisp;
+            current |= partialImm;
             //Update how many bytes we've collected.
             collected += toGet;
             consumeBytes(toGet);
@@ -144,9 +144,10 @@ namespace X86ISA
         bool emiIsReady;
         //The size of the displacement value
         int displacementSize;
-        int displacementCollected;
         //The size of the immediate value
         int immediateSize;
+        //This is how much of any immediate value we've gotten. This is used
+        //for both the actual immediate and the displacement.
         int immediateCollected;
 
         enum State {
diff --git a/src/arch/x86/syscallreturn.hh b/src/arch/x86/syscallreturn.hh
index 9f0d20e2a..6a7fdba58 100644
--- a/src/arch/x86/syscallreturn.hh
+++ b/src/arch/x86/syscallreturn.hh
@@ -59,16 +59,15 @@
 #define __ARCH_X86_SYSCALLRETURN_HH__
 
 #include "base/misc.hh"
+#include "cpu/thread_context.hh"
 #include "sim/syscallreturn.hh"
 
-class ThreadContext;
-
 namespace X86ISA
 {
     static inline void setSyscallReturn(SyscallReturn return_value,
             ThreadContext * tc)
     {
-        panic("setSyscallReturn not implemented!\n");
+        tc->setIntReg(INTREG_RAX, return_value.value());
     }
 };
 
diff --git a/src/arch/x86/types.hh b/src/arch/x86/types.hh
index 61ab2bac9..a509ff57a 100644
--- a/src/arch/x86/types.hh
+++ b/src/arch/x86/types.hh
@@ -61,7 +61,7 @@
 #include <inttypes.h>
 #include <iostream>
 
-#include "base/bitfield.hh"
+#include "base/bitunion.hh"
 #include "base/cprintf.hh"
 
 namespace X86ISA
@@ -86,11 +86,12 @@ namespace X86ISA
     };
 
     BitUnion8(LegacyPrefixVector)
+        Bitfield<7, 4> decodeVal;
         Bitfield<7> repne;
         Bitfield<6> rep;
         Bitfield<5> lock;
-        Bitfield<4> addr;
-        Bitfield<3> op;
+        Bitfield<4> op;
+        Bitfield<3> addr;
         //There can be only one segment override, so they share the
         //first 3 bits in the legacyPrefixes bitfield.
         Bitfield<2,0> seg;
@@ -184,8 +185,8 @@ namespace X86ISA
                            "prefixA = %#x,\n\t\tprefixB = %#x\n\t},\n\t"
                      "modRM = %#x,\n\tsib = %#x,\n\t"
                      "immediate = %#x,\n\tdisplacement = %#x\n}\n",
-                     emi.legacy, (uint8_t)emi.rex,
-                     emi.opcode.num, emi.opcode.op,
+                     (uint8_t)emi.legacy, (uint8_t)emi.rex,
+                     emi.opcode.num, (uint8_t)emi.opcode.op,
                      emi.opcode.prefixA, emi.opcode.prefixB,
                      (uint8_t)emi.modRM, (uint8_t)emi.sib,
                      emi.immediate, emi.displacement);
diff --git a/src/arch/x86/x86_traits.hh b/src/arch/x86/x86_traits.hh
index e45d62f8f..5794e7079 100644
--- a/src/arch/x86/x86_traits.hh
+++ b/src/arch/x86/x86_traits.hh
@@ -61,6 +61,7 @@
 namespace X86ISA
 {
     const int NumMicroIntRegs = 16;
+    const int NumPseudoIntRegs = 1;
 
     const int NumMMXRegs = 8;
     const int NumXMMRegs = 16;