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PPCAnalyst/JIT: add ability to easily toggle branch and carry merging

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This commit is contained in:
Fiora
2014-09-11 03:59:40 -07:00
parent 54129a8ca5
commit 08ac10d00a
4 changed files with 24 additions and 4 deletions
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15
Source/Core/Core/PowerPC/PPCAnalyst.cpp
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@@ -467,9 +467,13 @@ void PPCAnalyzer::ReorderInstructions(u32 instructions, CodeOp *code)
{
// For carry, bubble instructions *towards* each other; one direction often isn't enough
// to get pairs like addc/adde next to each other.
ReorderInstructionsCore(instructions, code, true, REORDER_CARRY);
ReorderInstructionsCore(instructions, code, false, REORDER_CARRY);
ReorderInstructionsCore(instructions, code, false, REORDER_CMP);
if (HasOption(OPTION_CARRY_MERGE))
{
ReorderInstructionsCore(instructions, code, true, REORDER_CARRY);
ReorderInstructionsCore(instructions, code, false, REORDER_CARRY);
}
if (HasOption(OPTION_BRANCH_MERGE))
ReorderInstructionsCore(instructions, code, false, REORDER_CMP);
}
void PPCAnalyzer::SetInstructionStats(CodeBlock *block, CodeOp *code, GekkoOPInfo *opinfo, u32 index)
@@ -509,7 +513,10 @@ void PPCAnalyzer::SetInstructionStats(CodeBlock *block, CodeOp *code, GekkoOPInf
// We're going to try to avoid storing carry in XER if we can avoid it -- keep it in the x86 carry flag!
// If the instruction reads CA but doesn't write it, we still need to store CA in XER; we can't
// leave it in flags.
code->wantsCAInFlags = code->wantsCA && code->outputCA && opinfo->type == OPTYPE_INTEGER;
if (HasOption(OPTION_CARRY_MERGE))
code->wantsCAInFlags = code->wantsCA && code->outputCA && opinfo->type == OPTYPE_INTEGER;
else
code->wantsCAInFlags = false;
// mfspr/mtspr can affect/use XER, so be super careful here
// we need to note specifically that mfspr needs CA in XER, not in the x86 carry flag