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Merge pull request #2093 from Dandandan/optimizebitscan

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Optimize bitscanforward using intrinsic function
This commit is contained in:
Ted John
2015-10-20 17:32:39 +01:00
parent 4f7476f8c2 d531243c98
commit 6fb6bb2556
1 changed files with 5 additions and 0 deletions
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5
src/util/util.c
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@@ -143,11 +143,16 @@ int bitscanforward(int source)
{
int i;
#if _MSC_VER >= 1400 // Visual Studio 2005
_BitScanForward(&i, source);
return i;
#else
for (i = 0; i < 32; i++)
if (source & (1 << i))
return i;
return -1;
#endif
}
int bitcount(int source)