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pathc from w3seek : bug 1702 : Fix BitScanReverse()

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svn path=/trunk/; revision=23156
This commit is contained in:
Magnus Olsen 2006-07-18 16:36:54 +00:00
parent 55b8810a2b
commit 97f449127c
1 changed files with 7 additions and 7 deletions
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14
reactos/include/psdk/winnt.h
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@ -3818,13 +3818,13 @@ static __inline__ BOOLEAN
BitScanReverse(OUT ULONG *Index, BitScanReverse(OUT ULONG *Index,
IN ULONG Mask) IN ULONG Mask)
{ {
LONG OldBit; BOOLEAN BitPosition = 0;
__asm__ __volatile__("bsrl %1,%2\n\t" __asm__ __volatile__("bsrl %2,%0\n\t"
"sbbl %0,%0\n\t" "setnz %1\n\t"
:"=r" (OldBit),"=m" (*Index) :"=&r" (*Index), "=r" (BitPosition)
:"Ir" (Mask) :"rm" (Mask)
: "memory"); :"memory");
return OldBit; return BitPosition;
} }
#endif #endif