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ARM: Fix branch prediction issue with CB(N)Z instruction

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This commit is contained in:
Brian Grayson 2012-03-09 15:32:41 -05:00
parent 927bba9d60
commit 9a9a4a0780
1 changed files with 3 additions and 8 deletions
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11
src/arch/arm/isa/templates/branch.isa
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@ -212,6 +212,8 @@ class %(class_name)s : public %(base_class)s
};
}};
// Only used by CBNZ, CBZ which is conditional based on
// a register value even though the instruction is always unconditional.
def template BranchImmRegConstructor {{
inline %(class_name)s::%(class_name)s(ExtMachInst machInst,
int32_t _imm,
@ -219,14 +221,7 @@ def template BranchImmRegConstructor {{
: %(base_class)s("%(mnemonic)s", machInst, %(op_class)s, _imm, _op1)
{
%(constructor)s;
if (!(condCode == COND_AL || condCode == COND_UC)) {
for (int x = 0; x < _numDestRegs; x++) {
_srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
}
flags[IsCondControl] = true;
} else {
flags[IsUncondControl] = true;
}
flags[IsCondControl] = true;
}
}};