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emit_x64: Arguments to MostSignificantBit and IsZero are 32-bit

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This commit is contained in:
MerryMage 2017-12-04 23:20:40 +00:00
parent f595f85039
commit 984ce22431
1 changed files with 2 additions and 2 deletions
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4
src/backend_x64/emit_x64.cpp
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@ -578,7 +578,7 @@ void EmitX64::EmitLeastSignificantByte(RegAlloc& reg_alloc, IR::Block&, IR::Inst
void EmitX64::EmitMostSignificantBit(RegAlloc& reg_alloc, IR::Block&, IR::Inst* inst) {
auto args = reg_alloc.GetArgumentInfo(inst);
Xbyak::Reg64 result = reg_alloc.UseScratchGpr(args[0]);
Xbyak::Reg32 result = reg_alloc.UseScratchGpr(args[0]).cvt32();
// TODO: Flag optimization
code->shr(result, 31);
reg_alloc.DefineValue(inst, result);
@ -586,7 +586,7 @@ void EmitX64::EmitMostSignificantBit(RegAlloc& reg_alloc, IR::Block&, IR::Inst*
void EmitX64::EmitIsZero(RegAlloc& reg_alloc, IR::Block&, IR::Inst* inst) {
auto args = reg_alloc.GetArgumentInfo(inst);
Xbyak::Reg64 result = reg_alloc.UseScratchGpr(args[0]);
Xbyak::Reg32 result = reg_alloc.UseScratchGpr(args[0]).cvt32();
// TODO: Flag optimization
code->test(result, result);
code->sete(result.cvt8());