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emit_x64_data_processing: Deduplicate some code in zero-extension functions

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EmitZeroExtendByteToLong() can be implemented in terms of EmitZeroExtendByteToWord() and
EmitZeroExtendHalfToLong() can be implemented in terms of EmitZeroExtendHalfToWord().
This commit is contained in:
Lioncash 2018-03-29 14:56:31 -04:00 committed by MerryMage
parent 40ec25356b
commit 3985f7bf84
1 changed files with 4 additions and 8 deletions
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12
src/backend_x64/emit_x64_data_processing.cpp
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@ -1218,17 +1218,13 @@ void EmitX64::EmitZeroExtendHalfToWord(EmitContext& ctx, IR::Inst* inst) {
}
void EmitX64::EmitZeroExtendByteToLong(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Reg64 result = ctx.reg_alloc.UseScratchGpr(args[0]);
code.movzx(result.cvt32(), result.cvt8()); // x64 zeros upper 32 bits on a 32-bit move
ctx.reg_alloc.DefineValue(inst, result);
// x64 zeros upper 32 bits on a 32-bit move
EmitZeroExtendByteToWord(ctx, inst);
}
void EmitX64::EmitZeroExtendHalfToLong(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Reg64 result = ctx.reg_alloc.UseScratchGpr(args[0]);
code.movzx(result.cvt32(), result.cvt16()); // x64 zeros upper 32 bits on a 32-bit move
ctx.reg_alloc.DefineValue(inst, result);
// x64 zeros upper 32 bits on a 32-bit move
EmitZeroExtendHalfToWord(ctx, inst);
}
void EmitX64::EmitZeroExtendWordToLong(EmitContext& ctx, IR::Inst* inst) {