diff options
| author | marha <marha@users.sourceforge.net> | 2011-06-03 08:18:04 +0200 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2011-06-03 08:18:04 +0200 |
| commit | cda19b1d226d565f1ca4327aeae827c621b3dfd6 (patch) | |
| tree | 8a511d718c888b17c257a905607068613359f9a6 /mesalib/src/gallium/auxiliary/util/u_math.h | |
| parent | 4d7ec99788d8a1d56ff4bccea279ae8186b18cdc (diff) | |
| download | vcxsrv-cda19b1d226d565f1ca4327aeae827c621b3dfd6.tar.gz vcxsrv-cda19b1d226d565f1ca4327aeae827c621b3dfd6.tar.bz2 vcxsrv-cda19b1d226d565f1ca4327aeae827c621b3dfd6.zip | |
xserver xkeyboard-config mesa git update 3 Jun 2011
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_math.h')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_math.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.h b/mesalib/src/gallium/auxiliary/util/u_math.h index 2ecade5f7..65a99fcb3 100644 --- a/mesalib/src/gallium/auxiliary/util/u_math.h +++ b/mesalib/src/gallium/auxiliary/util/u_math.h @@ -477,10 +477,13 @@ float_to_byte_tex(float f) static INLINE unsigned util_logbase2(unsigned n) { - unsigned log2 = 0; - while (n >>= 1) - ++log2; - return log2; + unsigned pos = 0; + if (n >= 1<<16) { n >>= 16; pos += 16; } + if (n >= 1<< 8) { n >>= 8; pos += 8; } + if (n >= 1<< 4) { n >>= 4; pos += 4; } + if (n >= 1<< 2) { n >>= 2; pos += 2; } + if (n >= 1<< 1) { pos += 1; } + return pos; } |