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TranslateArm: Implement UQSUB8.

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bunnei
2016-08-12 11:53:16 -04:00
committed by MerryMage
parent 1029fd27ce
commit 86fe29c6d2
7 changed files with 49 additions and 2 deletions
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18
src/backend_x64/emit_x64.cpp
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@@ -1055,6 +1055,24 @@ void EmitX64::EmitByteReverseDual(IR::Block&, IR::Inst* inst) {
code->BSWAP(64, result);
}
void EmitX64::EmitPackedSaturatedSubU8(IR::Block& block, IR::Inst* inst) {
IR::Value a = inst->GetArg(0);
IR::Value b = inst->GetArg(1);
X64Reg result = reg_alloc.UseDefRegister(a, inst, any_gpr);
OpArg op_arg = reg_alloc.UseOpArg(b, any_gpr);
X64Reg xmm_scratch_a = reg_alloc.ScratchRegister(any_xmm);
X64Reg xmm_scratch_b = reg_alloc.ScratchRegister(any_xmm);
code->MOVD_xmm(xmm_scratch_a, R(result));
code->MOVD_xmm(xmm_scratch_b, op_arg);
code->PSUBUSB(xmm_scratch_a, R(xmm_scratch_b));
code->MOVD_xmm(R(result), xmm_scratch_a);
}
static void DenormalsAreZero32(BlockOfCode* code, X64Reg xmm_value, X64Reg gpr_scratch) {
// We need to report back whether we've found a denormal on input.
// SSE doesn't do this for us when SSE's DAZ is enabled.