Add a level of indirection to the register accessors used in

instruction execute methods.  Register i now means the instruction's
i'th src (or dest) operand, not architectural register i.  Current
models that use the architectural reg index can look that up easily
in the instruction object.  Future models that do register renaming
should find this much simpler to deal with.

arch/isa_parser.py:
    Generate register accessors with an extra level of indirection.
cpu/simple_cpu/simple_cpu.hh:
    Modify register accessors to use an extra level of indirection.

--HG--
extra : convert_revision : f4c7d6bfa92fb2ea6251f31ee368809c3643f08f

1 files changed, 5 insertions, 5 deletions

diff --git a/arch/isa_parser.py b/arch/isa_parser.py
index 621720709..7f77241be 100755
--- a/arch/isa_parser.py
+++ b/arch/isa_parser.py
@@ -1057,10 +1057,10 @@ class IntRegOperandTraits(OperandTraits):
         if (type == 'float' or type == 'double'):
             error(0, 'Attempt to read integer register as FP')
         if (size == self.dflt_size):
-            return '%s = xc->readIntReg(_srcRegIdx[%d]);\n' % \
+            return '%s = xc->readIntReg(this, %d);\n' % \
                    (op_desc.munged_name, op_desc.src_reg_idx)
         else:
-            return '%s = bits(xc->readIntReg(_srcRegIdx[%d]), %d, 0);\n' % \
+            return '%s = bits(xc->readIntReg(this, %d), %d, 0);\n' % \
                    (op_desc.munged_name, op_desc.src_reg_idx, size-1)
 
     def makeWrite(self, op_desc):
@@ -1074,7 +1074,7 @@ class IntRegOperandTraits(OperandTraits):
         wb = '''
         {
             %s final_val = %s;
-            xc->setIntReg(_destRegIdx[%d], final_val);\n
+            xc->setIntReg(this, %d, final_val);\n
             if (traceData) { traceData->setData(final_val); }
         }''' % (self.dflt_type, final_val, op_desc.dest_reg_idx)
         return wb
@@ -1107,7 +1107,7 @@ class FloatRegOperandTraits(OperandTraits):
             func = 'readFloatRegInt'
             if (size != self.dflt_size):
                 bit_select = 1
-        base = 'xc->%s(_srcRegIdx[%d] - FP_Base_DepTag)' % \
+        base = 'xc->%s(this, %d)' % \
                (func, op_desc.src_reg_idx)
         if bit_select:
             return '%s = bits(%s, %d, 0);\n' % \
@@ -1130,7 +1130,7 @@ class FloatRegOperandTraits(OperandTraits):
         wb = '''
         {
             %s final_val = %s;
-            xc->%s(_destRegIdx[%d] - FP_Base_DepTag, final_val);\n
+            xc->%s(this, %d, final_val);\n
             if (traceData) { traceData->setData(final_val); }
         }''' % (type, final_val, func, op_desc.dest_reg_idx)
         return wb