diff options
| author | Matt Turner <mattst88@gmail.com> | 2015-02-02 17:26:49 -0800 |
|---|---|---|
| committer | Matt Turner <mattst88@gmail.com> | 2015-02-03 12:25:14 -0800 |
| commit | 32e98e8ef06f0bb6ad55f9fb5858be77c03367b0 (patch) | |
| tree | 46dcd0a28bea3a83c743e1042890049e0bcb9402 /src/gallium/auxiliary/util/u_math.h | |
| parent | d8be1b9abadf1f65eeaef86edee6654632473839 (diff) | |
gallium/util: Don't use __builtin_clrsb in util_last_bit().
Unclear circumstances lead to undefined symbols on x86.
Bugzilla: https://bugs.gentoo.org/show_bug.cgi?id=536916
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Diffstat (limited to 'src/gallium/auxiliary/util/u_math.h')
| -rw-r--r-- | src/gallium/auxiliary/util/u_math.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index 19c7343b171..ca6d0f1dfc8 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -561,14 +561,10 @@ util_last_bit(unsigned u) static INLINE unsigned util_last_bit_signed(int i) { -#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407) && !defined(__INTEL_COMPILER) - return 31 - __builtin_clrsb(i); -#else if (i >= 0) return util_last_bit(i); else return util_last_bit(~(unsigned)i); -#endif } /* Destructively loop over all of the bits in a mask as in: |