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pcsx2
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[FPU] - Uses Soft-Float comparison. 

More accurate approach to compare.
This commit is contained in:
GitHubProUser67 2024-11-13 18:19:37 +01:00
parent b7f38061df
commit b09bfb0c02
1 changed files with 41 additions and 22 deletions
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63
pcsx2/FPU.cpp
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@ -181,25 +181,6 @@ bool checkDivideByZero(u32& xReg, u32 yDivisorReg, u32 zDividendReg, u32 cFlagsT
_ContVal_ &= ~( cFlags ) ; \
}
#ifdef comparePrecision
// This compare discards the least-significant bit(s) in order to solve some rounding issues.
#define C_cond_S(cond) { \
FPRreg tempA, tempB; \
tempA.UL = _FsValUl_ & comparePrecision; \
tempB.UL = _FtValUl_ & comparePrecision; \
_ContVal_ = ( ( tempA.f ) cond ( tempB.f ) ) ? \
( _ContVal_ | FPUflagC ) : \
( _ContVal_ & ~FPUflagC ); \
}
#else
// Used for Comparing; This compares if the floats are exactly the same.
#define C_cond_S(cond) { \
_ContVal_ = ( fpuDouble(_FsValUl_) cond fpuDouble(_FtValUl_) ) ? \
( _ContVal_ | FPUflagC ) : \
( _ContVal_ & ~FPUflagC ); \
}
#endif
// Conditional Branch
#define BC1(cond) \
if ( ( _ContVal_ & FPUflagC ) cond 0 ) { \
@ -279,6 +260,44 @@ static __fi s32 double_to_int(double value)
return value;
}
static __fi void C_cond_S(uint8_t mode)
{
switch (mode)
{
case 0: // ==
if (CHECK_FPU_SOFT_ADDSUB || CHECK_FPU_SOFT_MULDIV || CHECK_FPU_SOFT_SQRT)
{
_ContVal_ = (Ps2Float(_FsValUl_).CompareTo(Ps2Float(_FtValUl_)) == 0) ? (_ContVal_ | FPUflagC) : (_ContVal_ & ~FPUflagC);
}
else
{
_ContVal_ = (fpuDouble(_FsValUl_) == fpuDouble(_FtValUl_)) ? (_ContVal_ | FPUflagC) : (_ContVal_ & ~FPUflagC);
}
break;
case 1: // <=
if (CHECK_FPU_SOFT_ADDSUB || CHECK_FPU_SOFT_MULDIV || CHECK_FPU_SOFT_SQRT)
{
int32_t cmpResult = Ps2Float(_FsValUl_).CompareTo(Ps2Float(_FtValUl_));
_ContVal_ = (cmpResult == 0 || cmpResult == -1) ? (_ContVal_ | FPUflagC) : (_ContVal_ & ~FPUflagC);
}
else
{
_ContVal_ = (fpuDouble(_FsValUl_) <= fpuDouble(_FtValUl_)) ? (_ContVal_ | FPUflagC) : (_ContVal_ & ~FPUflagC);
}
break;
case 2: // <
if (CHECK_FPU_SOFT_ADDSUB || CHECK_FPU_SOFT_MULDIV || CHECK_FPU_SOFT_SQRT)
{
_ContVal_ = (Ps2Float(_FsValUl_).CompareTo(Ps2Float(_FtValUl_)) == -1) ? (_ContVal_ | FPUflagC) : (_ContVal_ & ~FPUflagC);
}
else
{
_ContVal_ = (fpuDouble(_FsValUl_) < fpuDouble(_FtValUl_)) ? (_ContVal_ | FPUflagC) : (_ContVal_ & ~FPUflagC);
}
break;
}
}
void ABS_S() {
_FdValUl_ = _FsValUl_ & 0x7fffffff;
clearFPUFlags( FPUflagO | FPUflagU );
@ -313,7 +332,7 @@ void BC1TL() {
}
void C_EQ() {
C_cond_S(==);
C_cond_S(0);
}
void C_F() {
@ -321,11 +340,11 @@ void C_F() {
}
void C_LE() {
C_cond_S(<=);
C_cond_S(1);
}
void C_LT() {
C_cond_S(<);
C_cond_S(2);
}
void CFC1() {