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| author | Jason Garrett-Glaser <jason@x264.com> | 2011-04-22 17:59:55 -0400 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2011-04-22 20:05:48 -0400 |
| commit | 15919ee48f507a4ca17147e7247f5cb68f752c2c (patch) | |
| tree | 59b0a98820c3682cefc2ccca67c1255f1697cd00 /libavutil | |
| parent | 6ffd7eddb832a21f51661038620ef655640ee83f (diff) | |
| download | ffmpeg-15919ee48f507a4ca17147e7247f5cb68f752c2c.tar.gz | |
bswap: use native types for av_bwap16().
This prevents a call to bytestream_get_be16() using a movzwl both before
and after the ror instruction, which is obviously inefficient. Arm uses
the same trick also.
Sintel decoding goes from (avg+SD) 9.856 +/- 0.003 to 9.797 +/- 0.003 sec.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
Diffstat (limited to 'libavutil')
| -rw-r--r-- | libavutil/x86/bswap.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavutil/x86/bswap.h b/libavutil/x86/bswap.h index 28e3fecb1b..b60d9ccd6c 100644 --- a/libavutil/x86/bswap.h +++ b/libavutil/x86/bswap.h @@ -29,9 +29,9 @@ #include "libavutil/attributes.h" #define av_bswap16 av_bswap16 -static av_always_inline av_const uint16_t av_bswap16(uint16_t x) +static av_always_inline av_const unsigned av_bswap16(unsigned x) { - __asm__("rorw $8, %0" : "+r"(x)); + __asm__("rorw $8, %w0" : "+r"(x)); return x; } |