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unrolled modulo in {div|divu}_64x32_rem() and {mod|modu}_64x32() since it is apparently faster - this also gets rid of a duplicated div operation in {div|divu}_64x32_rem() / div*_64x32_rem() now call div*_64x32() (nw)

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This commit is contained in:
Oliver Stöneberg 2013-05-19 18:48:10 +00:00
parent 46c6b98571
commit edd2d136a0
1 changed files with 8 additions and 6 deletions
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14
src/emu/eminline.h
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@ -155,8 +155,9 @@ INLINE UINT32 divu_64x32(UINT64 a, UINT32 b)
#ifndef div_64x32_rem
INLINE INT32 div_64x32_rem(INT64 a, INT32 b, INT32 *remainder)
{
*remainder = a % (INT64)b;
return a / (INT64)b;
INT32 res = div_64x32(a, b);
*remainder = a - ((INT64)b * res);
return res;
}
#endif
@ -170,8 +171,9 @@ INLINE INT32 div_64x32_rem(INT64 a, INT32 b, INT32 *remainder)
#ifndef divu_64x32_rem
INLINE UINT32 divu_64x32_rem(UINT64 a, UINT32 b, UINT32 *remainder)
{
*remainder = a % (UINT64)b;
return a / (UINT64)b;
UINT32 res = divu_64x32(a, b);
*remainder = a - ((UINT64)b * res);
return res;
}
#endif
@ -212,7 +214,7 @@ INLINE UINT32 divu_32x32_shift(UINT32 a, UINT32 b, UINT8 shift)
#ifndef mod_64x32
INLINE INT32 mod_64x32(INT64 a, INT32 b)
{
return a % (INT64)b;
return a - (b * div_64x32(a, b));
}
#endif
@ -225,7 +227,7 @@ INLINE INT32 mod_64x32(INT64 a, INT32 b)
#ifndef modu_64x32
INLINE UINT32 modu_64x32(UINT64 a, UINT32 b)
{
return a % (UINT64)b;
return a - (b * divu_64x32(a, b));
}
#endif