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| author | marha <marha@users.sourceforge.net> | 2011-09-26 17:04:30 +0200 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2011-09-26 17:04:30 +0200 |
| commit | 873965b49f283ad028dd4e0e5b7e93a758c84993 (patch) | |
| tree | 84122d76cb641b54ea85cee9b631fb51c25052b5 /mesalib/src/gallium/auxiliary/util/u_math.h | |
| parent | c1e6c7428a8d2c1b60ffac7df7a3f56c300fa983 (diff) | |
| download | vcxsrv-873965b49f283ad028dd4e0e5b7e93a758c84993.tar.gz vcxsrv-873965b49f283ad028dd4e0e5b7e93a758c84993.tar.bz2 vcxsrv-873965b49f283ad028dd4e0e5b7e93a758c84993.zip | |
fontconfig libX11 libXext libXft libXmu mesa git update 26 sep 2011
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_math.h')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_math.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.h b/mesalib/src/gallium/auxiliary/util/u_math.h index 46d932293..c74c1da76 100644 --- a/mesalib/src/gallium/auxiliary/util/u_math.h +++ b/mesalib/src/gallium/auxiliary/util/u_math.h @@ -424,6 +424,22 @@ unsigned ffs( unsigned u ) #endif +/* Destructively loop over all of the bits in a mask as in: + * + * while (mymask) { + * int i = u_bit_scan(&mymask); + * ... process element i + * } + * + */ +static INLINE int u_bit_scan(unsigned *mask) +{ + int i = ffs(*mask) - 1; + *mask &= ~(1 << i); + return i; +} + + /** * Return float bits. */ |