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Implement UADD8

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This commit is contained in:
MerryMage
2016-12-04 20:52:33 +00:00
parent 7cad6949e7
commit 1a1646d962
5 changed files with 77 additions and 10 deletions
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65
src/backend_x64/emit_x64.cpp
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@@ -1242,22 +1242,51 @@ void EmitX64::EmitByteReverseDual(IR::Block&, IR::Inst* inst) {
code->bswap(result);
}
static void EmitPackedOperation(BlockOfCode* code, RegAlloc& reg_alloc, IR::Inst* inst, void (Xbyak::CodeGenerator::*fn)(const Xbyak::Mmx& mmx, const Xbyak::Operand&)) {
void EmitX64::EmitPackedAddU8(IR::Block& block, IR::Inst* inst) {
auto ge_inst = inst->GetAssociatedPseudoOperation(IR::Opcode::GetGEFromOp);
IR::Value a = inst->GetArg(0);
IR::Value b = inst->GetArg(1);
Xbyak::Reg32 result = reg_alloc.UseDefGpr(a, inst).cvt32();
Xbyak::Reg32 arg = reg_alloc.UseGpr(b).cvt32();
Xbyak::Reg32 reg_a = reg_alloc.UseScratchGpr(a).cvt32();
Xbyak::Reg32 reg_b = reg_alloc.UseScratchGpr(b).cvt32();
Xbyak::Reg32 result = reg_alloc.DefGpr(inst).cvt32();
Xbyak::Reg32 reg_ge, tmp;
Xbyak::Xmm xmm_scratch_a = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_scratch_b = reg_alloc.ScratchXmm();
if (ge_inst) {
EraseInstruction(block, ge_inst);
inst->DecrementRemainingUses();
code->movd(xmm_scratch_a, result);
code->movd(xmm_scratch_b, arg);
reg_ge = reg_alloc.DefGpr(ge_inst).cvt32();
tmp = reg_alloc.ScratchGpr().cvt32();
(code->*fn)(xmm_scratch_a, xmm_scratch_b);
code->mov(reg_ge, reg_a);
code->and_(reg_ge, reg_b);
}
code->movd(result, xmm_scratch_a);
// SWAR Arithmetic
code->mov(result, reg_a);
code->xor_(result, reg_b);
code->and_(result, 0x80808080);
code->and_(reg_a, 0x7F7F7F7F);
code->and_(reg_b, 0x7F7F7F7F);
code->add(reg_a, reg_b);
if (ge_inst) {
code->mov(tmp, result);
code->and_(tmp, reg_a);
code->or_(reg_ge, tmp);
}
code->xor_(result, reg_a);
if (ge_inst) {
if (cpu_info.has(Xbyak::util::Cpu::tBMI2)) {
code->mov(tmp, 0x80808080);
code->pext(reg_ge, reg_ge, tmp);
} else {
code->and_(reg_ge, 0x80808080);
code->imul(reg_ge, reg_ge, 0x0204081);
code->shr(reg_ge, 28);
}
}
}
void EmitX64::EmitPackedHalvingAddU8(IR::Block& block, IR::Inst* inst) {
@@ -1461,6 +1490,24 @@ void EmitX64::EmitPackedHalvingSubU16(IR::Block& block, IR::Inst* inst) {
// minuend now contains the desired result.
}
static void EmitPackedOperation(BlockOfCode* code, RegAlloc& reg_alloc, IR::Inst* inst, void (Xbyak::CodeGenerator::*fn)(const Xbyak::Mmx& mmx, const Xbyak::Operand&)) {
IR::Value a = inst->GetArg(0);
IR::Value b = inst->GetArg(1);
Xbyak::Reg32 result = reg_alloc.UseDefGpr(a, inst).cvt32();
Xbyak::Reg32 arg = reg_alloc.UseGpr(b).cvt32();
Xbyak::Xmm xmm_scratch_a = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_scratch_b = reg_alloc.ScratchXmm();
code->movd(xmm_scratch_a, result);
code->movd(xmm_scratch_b, arg);
(code->*fn)(xmm_scratch_a, xmm_scratch_b);
code->movd(result, xmm_scratch_a);
}
void EmitX64::EmitPackedSaturatedAddU8(IR::Block& block, IR::Inst* inst) {
EmitPackedOperation(code, reg_alloc, inst, &Xbyak::CodeGenerator::paddusb);
}