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EmitZeroExtendLongToQuad: Do not rely on register allocator to zero extend 64->128

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This commit is contained in:
MerryMage 2018-01-27 01:59:14 +00:00
parent f4f774f9f6
commit b2d99eddc6
2 changed files with 10 additions and 5 deletions
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6
src/backend_x64/emit_x64_data_processing.cpp
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@ -1196,8 +1196,10 @@ void EmitX64::EmitZeroExtendWordToLong(EmitContext& ctx, IR::Inst* inst) {
void EmitX64::EmitZeroExtendLongToQuad(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
if (args[0].IsInGpr()) {
// We let the register allocator automatically zero extend this when necessary
ctx.reg_alloc.DefineValue(inst, args[0]);
Xbyak::Reg64 source = ctx.reg_alloc.UseGpr(args[0]);
Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
code->movq(result, source);
ctx.reg_alloc.DefineValue(inst, result);
} else {
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
code->movq(result, result);