premiere
/
premiere-libtorrent
2
2
Fork 1
Code Issues Pull Requests Releases Wiki Activity

using bsr even with no popcnt present (#852)

This commit is contained in:
Alden Torres 2016-06-24 17:43:29 -04:00 committed by Arvid Norberg
parent 9efba7d752
commit c84aceea3f
1 changed files with 4 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/sha1_hash.cpp
View File

@ -76,16 +76,13 @@ namespace libtorrent
}
#if TORRENT_HAS_SSE
if (aux::mmx_support)
{
#ifdef __GNUC__
return ret + __builtin_clz(v);
return ret + __builtin_clz(v);
#else
DWORD pos;
_BitScanReverse(&pos, v);
return ret + 31 - pos;
DWORD pos;
_BitScanReverse(&pos, v);
return ret + 31 - pos;
#endif
}
#else
// http://graphics.stanford.edu/~seander/bithacks.html#IntegerLogObvious
static const int MultiplyDeBruijnBitPosition[32] =