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xenia-canary
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Dont constant evaluate MAX with V128! 

Fix signed zeroes behavior for vmaxfp emulation, was causing a block in sonic to move perpetually, very slowly
This commit is contained in:
chss95cs@gmail.com 2022-08-20 14:22:05 -07:00
parent 457296850e
commit d85bfc1894
2 changed files with 5 additions and 2 deletions
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4
src/xenia/cpu/backend/x64/x64_sequences.cc
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@ -549,12 +549,12 @@ struct MAX_F64 : Sequence<MAX_F64, I<OPCODE_MAX, F64Op, F64Op, F64Op>> {
struct MAX_V128 : Sequence<MAX_V128, I<OPCODE_MAX, V128Op, V128Op, V128Op>> {
static void Emit(X64Emitter& e, const EmitArgType& i) {
e.ChangeMxcsrMode(MXCSRMode::Vmx);
//if 0 and -0, return 0! opposite of minfp
auto src1 = GetInputRegOrConstant(e, i.src1, e.xmm0);
auto src2 = GetInputRegOrConstant(e, i.src2, e.xmm1);
e.vmaxps(e.xmm2, src1, src2);
e.vmaxps(e.xmm3, src2, src1);
e.vorps(i.dest, e.xmm2, e.xmm3);
e.vandps(i.dest, e.xmm2, e.xmm3);
}
};
EMITTER_OPCODE_TABLE(OPCODE_MAX, MAX_F32, MAX_F64, MAX_V128);

3
src/xenia/cpu/compiler/passes/constant_propagation_pass.cc
View File

@ -600,6 +600,9 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder, bool& result) {
break;
case OPCODE_MAX:
if (i->src1.value->IsConstant() && i->src2.value->IsConstant()) {
if (should_skip_because_of_float) {
break;
}
v->set_from(i->src1.value);
v->Max(i->src2.value);
i->Remove();