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Merge pull request #478 from lioncash/stepfused

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A64: Handle half-precision variants of FRECPE and FRECPS
This commit is contained in:
Merry
2019-04-14 12:40:18 +01:00
committed by MerryMage
parent 554c8c27c6 3739d92097
commit 45864133f5
14 changed files with 169 additions and 75 deletions
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64
src/backend/x64/emit_x64_floating_point.cpp
View File

@@ -754,6 +754,10 @@ static void EmitFPRecipEstimate(BlockOfCode& code, EmitContext& ctx, IR::Inst* i
code.CallFunction(&FP::FPRecipEstimate<FPT>);
}
void EmitX64::EmitFPRecipEstimate16(EmitContext& ctx, IR::Inst* inst) {
EmitFPRecipEstimate<u16>(code, ctx, inst);
}
void EmitX64::EmitFPRecipEstimate32(EmitContext& ctx, IR::Inst* inst) {
EmitFPRecipEstimate<u32>(code, ctx, inst);
}
@@ -787,40 +791,42 @@ template<size_t fsize>
static void EmitFPRecipStepFused(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst) {
using FPT = mp::unsigned_integer_of_size<fsize>;
if (code.DoesCpuSupport(Xbyak::util::Cpu::tFMA)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
if constexpr (fsize != 16) {
if (code.DoesCpuSupport(Xbyak::util::Cpu::tFMA)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Label end, fallback;
Xbyak::Label end, fallback;
const Xbyak::Xmm operand1 = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm operand2 = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm operand1 = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm operand2 = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
code.movaps(result, code.MConst(xword, FP::FPValue<FPT, false, 0, 2>()));
FCODE(vfnmadd231s)(result, operand1, operand2);
FCODE(ucomis)(result, result);
code.jp(fallback, code.T_NEAR);
code.L(end);
code.movaps(result, code.MConst(xword, FP::FPValue<FPT, false, 0, 2>()));
FCODE(vfnmadd231s)(result, operand1, operand2);
FCODE(ucomis)(result, result);
code.jp(fallback, code.T_NEAR);
code.L(end);
code.SwitchToFarCode();
code.L(fallback);
code.SwitchToFarCode();
code.L(fallback);
code.sub(rsp, 8);
ABI_PushCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
code.movq(code.ABI_PARAM1, operand1);
code.movq(code.ABI_PARAM2, operand2);
code.mov(code.ABI_PARAM3.cvt32(), ctx.FPCR().Value());
code.lea(code.ABI_PARAM4, code.ptr[code.r15 + code.GetJitStateInfo().offsetof_fpsr_exc]);
code.CallFunction(&FP::FPRecipStepFused<FPT>);
code.movq(result, code.ABI_RETURN);
ABI_PopCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
code.add(rsp, 8);
code.sub(rsp, 8);
ABI_PushCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
code.movq(code.ABI_PARAM1, operand1);
code.movq(code.ABI_PARAM2, operand2);
code.mov(code.ABI_PARAM3.cvt32(), ctx.FPCR().Value());
code.lea(code.ABI_PARAM4, code.ptr[code.r15 + code.GetJitStateInfo().offsetof_fpsr_exc]);
code.CallFunction(&FP::FPRecipStepFused<FPT>);
code.movq(result, code.ABI_RETURN);
ABI_PopCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
code.add(rsp, 8);
code.jmp(end, code.T_NEAR);
code.SwitchToNearCode();
code.jmp(end, code.T_NEAR);
code.SwitchToNearCode();
ctx.reg_alloc.DefineValue(inst, result);
return;
ctx.reg_alloc.DefineValue(inst, result);
return;
}
}
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
@@ -830,6 +836,10 @@ static void EmitFPRecipStepFused(BlockOfCode& code, EmitContext& ctx, IR::Inst*
code.CallFunction(&FP::FPRecipStepFused<FPT>);
}
void EmitX64::EmitFPRecipStepFused16(EmitContext& ctx, IR::Inst* inst) {
EmitFPRecipStepFused<16>(code, ctx, inst);
}
void EmitX64::EmitFPRecipStepFused32(EmitContext& ctx, IR::Inst* inst) {
EmitFPRecipStepFused<32>(code, ctx, inst);
}

58
src/backend/x64/emit_x64_vector_floating_point.cpp
View File

@@ -1092,6 +1092,10 @@ static void EmitRecipEstimate(BlockOfCode& code, EmitContext& ctx, IR::Inst* ins
});
}
void EmitX64::EmitFPVectorRecipEstimate16(EmitContext& ctx, IR::Inst* inst) {
EmitRecipEstimate<u16>(code, ctx, inst);
}
void EmitX64::EmitFPVectorRecipEstimate32(EmitContext& ctx, IR::Inst* inst) {
EmitRecipEstimate<u32>(code, ctx, inst);
}
@@ -1110,41 +1114,47 @@ static void EmitRecipStepFused(BlockOfCode& code, EmitContext& ctx, IR::Inst* in
}
};
if (code.DoesCpuSupport(Xbyak::util::Cpu::tFMA) && code.DoesCpuSupport(Xbyak::util::Cpu::tAVX)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
if constexpr (fsize != 16) {
if (code.DoesCpuSupport(Xbyak::util::Cpu::tFMA) && code.DoesCpuSupport(Xbyak::util::Cpu::tAVX)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm operand1 = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm operand2 = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm operand1 = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm operand2 = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
Xbyak::Label end, fallback;
Xbyak::Label end, fallback;
code.movaps(result, GetVectorOf<fsize, false, 0, 2>(code));
FCODE(vfnmadd231p)(result, operand1, operand2);
code.movaps(result, GetVectorOf<fsize, false, 0, 2>(code));
FCODE(vfnmadd231p)(result, operand1, operand2);
FCODE(vcmpunordp)(tmp, result, result);
code.vptest(tmp, tmp);
code.jnz(fallback, code.T_NEAR);
code.L(end);
FCODE(vcmpunordp)(tmp, result, result);
code.vptest(tmp, tmp);
code.jnz(fallback, code.T_NEAR);
code.L(end);
code.SwitchToFarCode();
code.L(fallback);
code.sub(rsp, 8);
ABI_PushCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
EmitThreeOpFallbackWithoutRegAlloc(code, ctx, result, operand1, operand2, fallback_fn);
ABI_PopCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
code.add(rsp, 8);
code.jmp(end, code.T_NEAR);
code.SwitchToNearCode();
code.SwitchToFarCode();
code.L(fallback);
code.sub(rsp, 8);
ABI_PushCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
EmitThreeOpFallbackWithoutRegAlloc(code, ctx, result, operand1, operand2, fallback_fn);
ABI_PopCallerSaveRegistersAndAdjustStackExcept(code, HostLocXmmIdx(result.getIdx()));
code.add(rsp, 8);
code.jmp(end, code.T_NEAR);
code.SwitchToNearCode();
ctx.reg_alloc.DefineValue(inst, result);
return;
ctx.reg_alloc.DefineValue(inst, result);
return;
}
}
EmitThreeOpFallback(code, ctx, inst, fallback_fn);
}
void EmitX64::EmitFPVectorRecipStepFused16(EmitContext& ctx, IR::Inst* inst) {
EmitRecipStepFused<16>(code, ctx, inst);
}
void EmitX64::EmitFPVectorRecipStepFused32(EmitContext& ctx, IR::Inst* inst) {
EmitRecipStepFused<32>(code, ctx, inst);
}