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Core: Remove usage of fpclassify from R4300iOp::CheckFPUResult64

This commit is contained in:
zilmar 2024-01-18 16:53:14 +10:30
parent 71067ccdc4
commit 2231e8d6c0
1 changed files with 2 additions and 3 deletions
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5
Source/Project64-core/N64System/Interpreter/InterpreterOps.cpp
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@ -3506,8 +3506,7 @@ bool R4300iOp::CheckFPUResult64(double & Result)
{
int Except = fetestexcept(FE_ALL_EXCEPT);
bool DoException = false;
int fptype = fpclassify(Result);
if (fptype == FP_NAN)
if ((*((uint64_t *)&Result) & 0x7FF0000000000000ULL) == 0x7FF0000000000000ULL && (*((uint64_t *)&Result) & 0x000FFFFFFFFFFFFFULL) != 0x0000000000000000ULL) // NaN
{
if (Except == 0 || !SetFPUException())
{
@ -3518,7 +3517,7 @@ bool R4300iOp::CheckFPUResult64(double & Result)
DoException = true;
}
}
else if (fptype == FP_SUBNORMAL)
else if ((*((uint64_t *)&Result) & 0x7FF0000000000000ULL) == 0x0000000000000000ULL && (*((uint64_t *)&Result) & 0x000FFFFFFFFFFFFFULL) != 0x0000000000000000ULL)
{
FPStatusReg & StatusReg = (FPStatusReg &)m_FPCR[31];
if (!StatusReg.FlushSubnormals || StatusReg.Enable.Underflow || StatusReg.Enable.Inexact)