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[CPU] Handle constant multiply in fmadd/fmsub in constant propagation pass

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This commit is contained in:
DrChat
2018-03-01 20:04:56 -06:00
parent d31db60a75
commit 6fd75cea91
3 changed files with 23 additions and 71 deletions
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21
src/xenia/cpu/compiler/passes/constant_propagation_pass.cc
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@@ -499,11 +499,20 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder) {
break;
case OPCODE_MUL_ADD:
if (i->src1.value->IsConstant() && i->src2.value->IsConstant()) {
// Multiply part is constant.
if (i->src3.value->IsConstant()) {
v->set_from(i->src1.value);
Value::MulAdd(v, i->src1.value, i->src2.value, i->src3.value);
i->Remove();
} else {
// Multiply part is constant.
Value* mul = builder->AllocValue();
mul->set_from(i->src1.value);
mul->Mul(i->src2.value);
Value* add = i->src3.value;
i->Replace(&OPCODE_ADD_info, 0);
i->set_src1(mul);
i->set_src2(add);
}
}
break;
@@ -514,6 +523,16 @@ bool ConstantPropagationPass::Run(HIRBuilder* builder) {
v->set_from(i->src1.value);
Value::MulSub(v, i->src1.value, i->src2.value, i->src3.value);
i->Remove();
} else {
// Multiply part is constant.
Value* mul = builder->AllocValue();
mul->set_from(i->src1.value);
mul->Mul(i->src2.value);
Value* add = i->src3.value;
i->Replace(&OPCODE_SUB_info, 0);
i->set_src1(mul);
i->set_src2(add);
}
}
break;