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| author | Andrew Mahone <andrew.mahone@gmail.com> | 2009-12-05 21:32:23 +0000 |
|---|---|---|
| committer | Andrew Mahone <andrew.mahone@gmail.com> | 2009-12-05 21:32:23 +0000 |
| commit | 2aeb6c781dd48df39e1cb029e9be33b05347b9d2 (patch) | |
| tree | d7d8b728a8403de436bbf3c7366798a391673a4e /apps/codecs | |
| parent | 18c56ef386de6a705ab375dee59dbfda15ae1ce2 (diff) | |
Slightly improve av_log2 in codeclib on ARMv6.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23866 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs')
| -rw-r--r-- | apps/codecs/lib/codeclib.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/apps/codecs/lib/codeclib.h b/apps/codecs/lib/codeclib.h index bf7b41775a..a5ecb73027 100644 --- a/apps/codecs/lib/codeclib.h +++ b/apps/codecs/lib/codeclib.h @@ -79,8 +79,7 @@ unsigned udiv32_arm(unsigned a, unsigned b); #if (defined(CPU_ARM) && (ARM_ARCH > 4)) static inline unsigned int av_log2(uint32_t v) { - unsigned int lz = __builtin_clz(v); - return 31 - lz + (lz >> 5); /* make sure av_log2(0) returns 0 */ + return v ? 31 - __builtin_clz(v) : v; } #else /* From libavutil/common.h */ |