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Add float platform macro's

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This commit is contained in:
Kawe Mazidjatari 2023-08-21 11:28:04 +02:00
parent a5d1de8ead
commit 650f961fb0
1 changed files with 15 additions and 0 deletions
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15
r5dev/mathlib/swap.h
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@ -11,6 +11,10 @@
#define LittleDWord( val ) ( val )
#define LittleQWord( val ) ( val )
// If a swapped float passes through the fpu, the bytes may get changed.
// Prevent this by swapping floats as DWORDs.
#define SafeSwapFloat( pOut, pIn ) (*((uint*)pOut) = DWordSwap( *((uint*)pIn) ))
template <typename T>
inline T WordSwapC(T w)
{
@ -98,6 +102,12 @@ inline void StoreLittleInt64(uint64* base, unsigned int nWordIndex, uint64 nWord
__storedoublewordbytereverse(nWord, nWordIndex << 2, base);
}
#endif
// Pass floats by pointer for swapping to avoid truncation in the fpu
#define BigFloat( pOut, pIn ) ( *pOut = *pIn )
#define LittleFloat( pOut, pIn ) SafeSwapFloat( pOut, pIn )
#define SwapFloat( pOut, pIn ) LittleFloat( pOut, pIn )
#else
inline uint32 LoadLittleDWord(uint32* base, unsigned int dwordIndex)
{
@ -108,4 +118,9 @@ inline void StoreLittleDWord(uint32* base, unsigned int dwordIndex, uint32 dword
{
base[dwordIndex] = LittleDWord(dword);
}
// Pass floats by pointer for swapping to avoid truncation in the fpu
#define BigFloat( pOut, pIn ) SafeSwapFloat( pOut, pIn )
#define LittleFloat( pOut, pIn ) ( *pOut = *pIn )
#define SwapFloat( pOut, pIn ) BigFloat( pOut, pIn )
#endif