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Implement SADD8, SADD16, SSUB8, SSUB16, USUB16

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This commit is contained in:
FernandoS27
2016-12-18 11:25:41 -05:00
committed by Merry
parent 3f6ecfe245
commit 8919265d2c
6 changed files with 398 additions and 42 deletions
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278
src/backend_x64/emit_x64.cpp
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@@ -1278,6 +1278,26 @@ void EmitX64::EmitCountLeadingZeros(IR::Block&, IR::Inst* inst) {
}
}
void EmitX64::EmitNegateLowWord(IR::Block&, IR::Inst* inst) {
IR::Value a = inst->GetArg(0);
Xbyak::Reg32 result = reg_alloc.UseDefGpr(a, inst).cvt32();
code->ror(result, 16);
code->xor(result, 0xFFFF0000);
code->add(result, 0x00010000);
code->ror(result, 16);
}
void EmitX64::EmitNegateHighWord(IR::Block&, IR::Inst* inst) {
IR::Value a = inst->GetArg(0);
Xbyak::Reg32 result = reg_alloc.UseDefGpr(a, inst).cvt32();
code->xor(result, 0xFFFF0000);
code->add(result, 0x00010000);
}
void EmitX64::EmitSignedSaturatedAdd(IR::Block& block, IR::Inst* inst) {
auto overflow_inst = inst->GetAssociatedPseudoOperation(IR::Opcode::GetOverflowFromOp);
@@ -1328,6 +1348,25 @@ void EmitX64::EmitSignedSaturatedSub(IR::Block& block, IR::Inst* inst) {
}
}
static void ExtractMostSignificantBitFromPackedBytes(const Xbyak::util::Cpu& cpu_info, BlockOfCode* code, RegAlloc& reg_alloc, Xbyak::Reg32 value, boost::optional<Xbyak::Reg32> a_tmp = boost::none) {
if (cpu_info.has(Xbyak::util::Cpu::tBMI2)) {
Xbyak::Reg32 tmp = a_tmp ? *a_tmp : reg_alloc.ScratchGpr().cvt32();
code->mov(tmp, 0x80808080);
code->pext(value, value, tmp);
} else {
code->and_(value, 0x80808080);
code->imul(value, value, 0x00204081);
code->shr(value, 28);
}
}
static void ExtractAndDuplicateMostSignificantBitFromPackedWords(BlockOfCode* code, Xbyak::Reg32 value) {
code->and_(value, 0x80008000);
code->shr(value, 1);
code->imul(value, value, 0xC003);
code->shr(value, 28);
}
void EmitX64::EmitPackedAddU8(IR::Block& block, IR::Inst* inst) {
auto ge_inst = inst->GetAssociatedPseudoOperation(IR::Opcode::GetGEFromOp);
@@ -1364,14 +1403,119 @@ void EmitX64::EmitPackedAddU8(IR::Block& block, IR::Inst* inst) {
}
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);
}
ExtractMostSignificantBitFromPackedBytes(cpu_info, code, reg_alloc, reg_ge);
}
}
void EmitX64::EmitPackedAddS8(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 reg_a = reg_alloc.UseDefGpr(a, inst).cvt32();
Xbyak::Reg32 reg_b = reg_alloc.UseGpr(b).cvt32();
Xbyak::Reg32 reg_ge;
Xbyak::Xmm xmm_a = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_b = reg_alloc.ScratchXmm();
if (ge_inst) {
EraseInstruction(block, ge_inst);
inst->DecrementRemainingUses();
reg_ge = reg_alloc.DefGpr(ge_inst).cvt32();
}
code->movd(xmm_a, reg_a);
code->movd(xmm_b, reg_b);
if (ge_inst) {
Xbyak::Xmm saturated_sum = reg_alloc.ScratchXmm();
code->movdqa(saturated_sum, xmm_a);
code->paddsb(saturated_sum, xmm_b);
code->movd(reg_ge, saturated_sum);
}
code->paddb(xmm_a, xmm_b);
code->movd(reg_a, xmm_a);
if (ge_inst) {
code->not_(reg_ge);
ExtractMostSignificantBitFromPackedBytes(cpu_info, code, reg_alloc, reg_ge);
}
}
void EmitX64::EmitPackedAddU16(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 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;
if (ge_inst) {
EraseInstruction(block, ge_inst);
inst->DecrementRemainingUses();
reg_ge = reg_alloc.DefGpr(ge_inst).cvt32();
code->mov(reg_ge, reg_a);
code->and_(reg_ge, reg_b);
}
// SWAR Arithmetic
code->mov(result, reg_a);
code->xor_(result, reg_b);
code->and_(result, 0x80008000);
code->and_(reg_a, 0x7FFF7FFF);
code->and_(reg_b, 0x7FFF7FFF);
code->add(reg_a, reg_b);
if (ge_inst) {
tmp = reg_alloc.ScratchGpr().cvt32();
code->mov(tmp, result);
code->and_(tmp, reg_a);
code->or_(reg_ge, tmp);
}
code->xor_(result, reg_a);
if (ge_inst) {
ExtractAndDuplicateMostSignificantBitFromPackedWords(code, reg_ge);
}
}
void EmitX64::EmitPackedAddS16(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 reg_a = reg_alloc.UseDefGpr(a, inst).cvt32();
Xbyak::Reg32 reg_b = reg_alloc.UseGpr(b).cvt32();
Xbyak::Reg32 reg_ge;
Xbyak::Xmm xmm_a = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_b = reg_alloc.ScratchXmm();
if (ge_inst) {
EraseInstruction(block, ge_inst);
inst->DecrementRemainingUses();
reg_ge = reg_alloc.DefGpr(ge_inst).cvt32();
}
code->movd(xmm_a, reg_a);
code->movd(xmm_b, reg_b);
if (ge_inst) {
Xbyak::Xmm saturated_sum = reg_alloc.ScratchXmm();
code->movdqa(saturated_sum, xmm_a);
code->paddsw(saturated_sum, xmm_b);
code->movd(reg_ge, saturated_sum);
}
code->paddw(xmm_a, xmm_b);
code->movd(reg_a, xmm_a);
if (ge_inst) {
code->not_(reg_ge);
ExtractAndDuplicateMostSignificantBitFromPackedWords(code, reg_ge);
}
}
@@ -1409,15 +1553,115 @@ void EmitX64::EmitPackedSubU8(IR::Block& block, IR::Inst* inst) {
code->movd(reg_a, xmm_a);
if (ge_inst) {
if (cpu_info.has(Xbyak::util::Cpu::tBMI2)) {
Xbyak::Reg32 tmp = reg_alloc.ScratchGpr().cvt32();
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);
}
ExtractMostSignificantBitFromPackedBytes(cpu_info, code, reg_alloc, reg_ge);
}
}
void EmitX64::EmitPackedSubS8(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 reg_a = reg_alloc.UseDefGpr(a, inst).cvt32();
Xbyak::Reg32 reg_b = reg_alloc.UseGpr(b).cvt32();
Xbyak::Reg32 reg_ge;
Xbyak::Xmm xmm_a = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_b = reg_alloc.ScratchXmm();
if (ge_inst) {
EraseInstruction(block, ge_inst);
inst->DecrementRemainingUses();
reg_ge = reg_alloc.DefGpr(ge_inst).cvt32();
}
code->movd(xmm_b, reg_b);
code->movd(xmm_a, reg_a);
if (ge_inst) {
Xbyak::Xmm xmm_ge = reg_alloc.ScratchXmm();
code->movdqa(xmm_ge, xmm_a);
code->psubsb(xmm_ge, xmm_b);
code->movd(reg_ge, xmm_ge);
}
code->psubb(xmm_a, xmm_b);
code->movd(reg_a, xmm_a);
if (ge_inst) {
code->not_(reg_ge);
ExtractMostSignificantBitFromPackedBytes(cpu_info, code, reg_alloc, reg_ge);
}
}
void EmitX64::EmitPackedSubU16(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 reg_a = reg_alloc.UseDefGpr(a, inst).cvt32();
Xbyak::Reg32 reg_b = reg_alloc.UseGpr(b).cvt32();
Xbyak::Reg32 reg_ge;
Xbyak::Xmm xmm_a = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_b = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_ge;
if (ge_inst) {
EraseInstruction(block, ge_inst);
inst->DecrementRemainingUses();
reg_ge = reg_alloc.DefGpr(ge_inst).cvt32();
xmm_ge = reg_alloc.ScratchXmm();
}
code->movd(xmm_a, reg_a);
code->movd(xmm_b, reg_b);
if (ge_inst) {
code->movdqa(xmm_ge, xmm_a);
code->pmaxuw(xmm_ge, xmm_b);
code->pcmpeqw(xmm_ge, xmm_a);
code->movd(reg_ge, xmm_ge);
}
code->psubw(xmm_a, xmm_b);
code->movd(reg_a, xmm_a);
if (ge_inst) {
ExtractAndDuplicateMostSignificantBitFromPackedWords(code, reg_ge);
}
}
void EmitX64::EmitPackedSubS16(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 reg_a = reg_alloc.UseDefGpr(a, inst).cvt32();
Xbyak::Reg32 reg_b = reg_alloc.UseGpr(b).cvt32();
Xbyak::Reg32 reg_ge;
Xbyak::Xmm xmm_a = reg_alloc.ScratchXmm();
Xbyak::Xmm xmm_b = reg_alloc.ScratchXmm();
if (ge_inst) {
EraseInstruction(block, ge_inst);
inst->DecrementRemainingUses();
reg_ge = reg_alloc.DefGpr(ge_inst).cvt32();
}
code->movd(xmm_b, reg_b);
code->movd(xmm_a, reg_a);
if (ge_inst) {
Xbyak::Xmm xmm_ge = reg_alloc.ScratchXmm();
code->movdqa(xmm_ge, xmm_a);
code->psubsw(xmm_ge, xmm_b);
code->movd(reg_ge, xmm_ge);
}
code->psubw(xmm_a, xmm_b);
code->movd(reg_a, xmm_a);
if (ge_inst) {
code->not_(reg_ge);
ExtractAndDuplicateMostSignificantBitFromPackedWords(code, reg_ge);
}
}