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[x64] LoadConstantXmm: Don't load -0 as +0 + cleanup

This commit is contained in:
Triang3l 2021-05-16 14:26:43 +03:00
parent f39020700a
commit ff23b1d9f9
1 changed files with 7 additions and 7 deletions
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14
src/xenia/cpu/backend/x64/x64_emitter.cc
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@ -801,7 +801,7 @@ void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, const vec128_t& v) {
if (!v.low && !v.high) {
// 0000...
vpxor(dest, dest);
} else if (v.low == ~0ull && v.high == ~0ull) {
} else if (v.low == ~uint64_t(0) && v.high == ~uint64_t(0)) {
// 1111...
vpcmpeqb(dest, dest);
} else {
@ -818,10 +818,10 @@ void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, float v) {
float f;
uint32_t i;
} x = {v};
if (!v) {
// 0
if (!x.i) {
// +0.0f (but not -0.0f because it may be used to flip the sign via xor).
vpxor(dest, dest);
} else if (x.i == ~0U) {
} else if (x.i == ~uint32_t(0)) {
// 1111...
vpcmpeqb(dest, dest);
} else {
@ -837,10 +837,10 @@ void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, double v) {
double d;
uint64_t i;
} x = {v};
if (!v) {
// 0
if (!x.i) {
// +0.0 (but not -0.0 because it may be used to flip the sign via xor).
vpxor(dest, dest);
} else if (x.i == ~0ULL) {
} else if (x.i == ~uint64_t(0)) {
// 1111...
vpcmpeqb(dest, dest);
} else {