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A64: Implement SQXTUN

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This commit is contained in:
MerryMage
2018-07-24 16:06:55 +01:00
parent 6918ef7360
commit f020dbe4ed
11 changed files with 604 additions and 457 deletions
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88
src/backend_x64/emit_x64_vector.cpp
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@@ -69,6 +69,30 @@ static void EmitOneArgumentFallback(BlockOfCode& code, EmitContext& ctx, IR::Ins
ctx.reg_alloc.DefineValue(inst, xmm0);
}
template <typename Lambda>
static void EmitOneArgumentFallbackWithSaturation(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst, Lambda lambda) {
const auto fn = static_cast<mp::equivalent_function_type_t<Lambda>*>(lambda);
constexpr u32 stack_space = 2 * 16;
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm arg1 = ctx.reg_alloc.UseXmm(args[0]);
ctx.reg_alloc.EndOfAllocScope();
ctx.reg_alloc.HostCall(nullptr);
code.sub(rsp, stack_space + ABI_SHADOW_SPACE);
code.lea(code.ABI_PARAM1, ptr[rsp + ABI_SHADOW_SPACE + 0 * 16]);
code.lea(code.ABI_PARAM2, ptr[rsp + ABI_SHADOW_SPACE + 1 * 16]);
code.movaps(xword[code.ABI_PARAM2], arg1);
code.CallFunction(fn);
code.movaps(xmm0, xword[rsp + ABI_SHADOW_SPACE + 0 * 16]);
code.add(rsp, stack_space + ABI_SHADOW_SPACE);
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], code.ABI_RETURN.cvt8());
ctx.reg_alloc.DefineValue(inst, xmm0);
}
template <typename Lambda>
static void EmitTwoArgumentFallback(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst, Lambda lambda) {
const auto fn = static_cast<mp::equivalent_function_type_t<Lambda>*>(lambda);
@@ -2169,6 +2193,70 @@ void EmitX64::EmitVectorSignedAbsoluteDifference32(EmitContext& ctx, IR::Inst* i
EmitVectorSignedAbsoluteDifference(32, ctx, inst, code);
}
static void EmitVectorSignedSaturatedNarrowToUnsigned(size_t original_esize, BlockOfCode& code, EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm src = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm dest = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm reconstructed = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm zero = ctx.reg_alloc.ScratchXmm();
code.movdqa(dest, src);
code.pxor(zero, zero);
switch (original_esize) {
case 16:
code.packuswb(dest, dest);
code.movdqa(reconstructed, dest);
code.punpcklbw(reconstructed, zero);
break;
case 32:
code.packusdw(dest, dest);
code.movdqa(reconstructed, dest);
code.punpcklwd(reconstructed, zero);
break;
default:
UNREACHABLE();
break;
}
const Xbyak::Reg32 bit = ctx.reg_alloc.ScratchGpr().cvt32();
if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSE41)) {
code.pxor(reconstructed, src);
code.ptest(reconstructed, reconstructed);
} else {
code.pcmpeqd(reconstructed, src);
code.movmskps(bit, reconstructed);
code.cmp(bit, 0);
}
code.setnz(bit.cvt8());
code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], bit.cvt8());
ctx.reg_alloc.DefineValue(inst, dest);
}
void EmitX64::EmitVectorSignedSaturatedNarrowToUnsigned16(EmitContext& ctx, IR::Inst* inst) {
EmitVectorSignedSaturatedNarrowToUnsigned(16, code, ctx, inst);
}
void EmitX64::EmitVectorSignedSaturatedNarrowToUnsigned32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorSignedSaturatedNarrowToUnsigned(32, code, ctx, inst);
}
void EmitX64::EmitVectorSignedSaturatedNarrowToUnsigned64(EmitContext& ctx, IR::Inst* inst) {
EmitOneArgumentFallbackWithSaturation(code, ctx, inst, [](VectorArray<u32>& result, const VectorArray<s64>& a) {
bool qc_flag = false;
result.fill(0);
for (size_t i = 0; i < a.size(); ++i) {
const s64 saturated = std::clamp<s64>(a[i], 0, 0xFFFFFFFF);
result[i] = static_cast<u32>(saturated);
qc_flag |= saturated != a[i];
}
return qc_flag;
});
}
void EmitX64::EmitVectorSub8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorOperation(code, ctx, inst, &Xbyak::CodeGenerator::psubb);
}