1 files changed, 128 insertions, 0 deletions
diff --git a/arch/alpha/isa/int.isa b/arch/alpha/isa/int.isa
new file mode 100644
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+++ b/arch/alpha/isa/int.isa
@@ -0,0 +1,128 @@
+// -*- mode:c++ -*-
+
+// Copyright (c) 2003-2005 The Regents of The University of Michigan
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met: 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 holders nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// 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.
+
+output header {{
+    /**
+     * Base class for integer immediate instructions.
+     */
+    class IntegerImm : public AlphaStaticInst
+    {
+      protected:
+        /// Immediate operand value (unsigned 8-bit int).
+        uint8_t imm;
+
+        /// Constructor
+        IntegerImm(const char *mnem, MachInst _machInst, OpClass __opClass)
+            : AlphaStaticInst(mnem, _machInst, __opClass), imm(INTIMM)
+        {
+        }
+
+        std::string
+        generateDisassembly(Addr pc, const SymbolTable *symtab) const;
+    };
+}};
+
+output decoder {{
+    std::string
+    IntegerImm::generateDisassembly(Addr pc, const SymbolTable *symtab) const
+    {
+        std::stringstream ss;
+
+        ccprintf(ss, "%-10s ", mnemonic);
+
+        // just print the first source reg... if there's
+        // a second one, it's a read-modify-write dest (Rc),
+        // e.g. for CMOVxx
+        if (_numSrcRegs > 0) {
+            printReg(ss, _srcRegIdx[0]);
+            ss << ",";
+        }
+
+        ss << (int)imm;
+
+        if (_numDestRegs > 0) {
+            ss << ",";
+            printReg(ss, _destRegIdx[0]);
+        }
+
+        return ss.str();
+    }
+}};
+
+
+def template RegOrImmDecode {{
+ {
+     AlphaStaticInst *i =
+         (IMM) ? (AlphaStaticInst *)new %(class_name)sImm(machInst)
+               : (AlphaStaticInst *)new %(class_name)s(machInst);
+     if (RC == 31) {
+         i = makeNop(i);
+     }
+     return i;
+ }
+}};
+
+// Primary format for integer operate instructions:
+// - Generates both reg-reg and reg-imm versions if Rb_or_imm is used.
+// - Generates NOP if RC == 31.
+def format IntegerOperate(code, *opt_flags) {{
+    # If the code block contains 'Rb_or_imm', we define two instructions,
+    # one using 'Rb' and one using 'imm', and have the decoder select
+    # the right one.
+    uses_imm = (code.find('Rb_or_imm') != -1)
+    if uses_imm:
+        orig_code = code
+        # base code is reg version:
+        # rewrite by substituting 'Rb' for 'Rb_or_imm'
+        code = re.sub(r'Rb_or_imm', 'Rb', orig_code)
+        # generate immediate version by substituting 'imm'
+        # note that imm takes no extenstion, so we extend
+        # the regexp to replace any extension as well
+        imm_code = re.sub(r'Rb_or_imm(\.\w+)?', 'imm', orig_code)
+
+    # generate declaration for register version
+    cblk = CodeBlock(code)
+    iop = InstObjParams(name, Name, 'AlphaStaticInst', cblk, opt_flags)
+    header_output = BasicDeclare.subst(iop)
+    decoder_output = BasicConstructor.subst(iop)
+    exec_output = BasicExecute.subst(iop)
+
+    if uses_imm:
+        # append declaration for imm version
+        imm_cblk = CodeBlock(imm_code)
+        imm_iop = InstObjParams(name, Name + 'Imm', 'IntegerImm', imm_cblk,
+                                opt_flags)
+        header_output += BasicDeclare.subst(imm_iop)
+        decoder_output += BasicConstructor.subst(imm_iop)
+        exec_output += BasicExecute.subst(imm_iop)
+        # decode checks IMM bit to pick correct version
+        decode_block = RegOrImmDecode.subst(iop)
+    else:
+        # no imm version: just check for nop
+        decode_block = OperateNopCheckDecode.subst(iop)
+}};