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TranslateArm: Implement QSUB8.

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bunnei
2016-08-12 13:18:38 -04:00
committed by MerryMage
parent 86fe29c6d2
commit 127fbe99cb
7 changed files with 26 additions and 5 deletions
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12
src/backend_x64/emit_x64.cpp
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@@ -1055,7 +1055,7 @@ void EmitX64::EmitByteReverseDual(IR::Block&, IR::Inst* inst) {
code->BSWAP(64, result);
}
void EmitX64::EmitPackedSaturatedSubU8(IR::Block& block, IR::Inst* inst) {
static void EmitPackedOperation(BlockOfCode* code, RegAlloc& reg_alloc, IR::Inst* inst, void (XEmitter::*fn)(X64Reg, const OpArg&)) {
IR::Value a = inst->GetArg(0);
IR::Value b = inst->GetArg(1);
@@ -1068,11 +1068,19 @@ void EmitX64::EmitPackedSaturatedSubU8(IR::Block& block, IR::Inst* inst) {
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->*fn)(xmm_scratch_a, R(xmm_scratch_b));
code->MOVD_xmm(R(result), xmm_scratch_a);
}
void EmitX64::EmitPackedSaturatedSubU8(IR::Block& block, IR::Inst* inst) {
EmitPackedOperation(code, reg_alloc, inst, &XEmitter::PSUBUSB);
}
void EmitX64::EmitPackedSaturatedSubS8(IR::Block& block, IR::Inst* inst) {
EmitPackedOperation(code, reg_alloc, inst, &XEmitter::PSUBSB);
}
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.