ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Thu Jan 17 22:35:10 2019 +0100| [12b1338be376a3e5fb606d9fe41b58dc4a9e62c7] | committer: Michael Niedermayer
avutil/mem: Optimize fill32() by unrolling and using 64bit Reviewed-by: Marton Balint <c...@passwd.hu> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=12b1338be376a3e5fb606d9fe41b58dc4a9e62c7 --- libavutil/mem.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/libavutil/mem.c b/libavutil/mem.c index 6149755a6b..88fe09b179 100644 --- a/libavutil/mem.c +++ b/libavutil/mem.c @@ -399,6 +399,18 @@ static void fill32(uint8_t *dst, int len) { uint32_t v = AV_RN32(dst - 4); +#if HAVE_FAST_64BIT + uint64_t v2= v + ((uint64_t)v<<32); + while (len >= 32) { + AV_WN64(dst , v2); + AV_WN64(dst+ 8, v2); + AV_WN64(dst+16, v2); + AV_WN64(dst+24, v2); + dst += 32; + len -= 32; + } +#endif + while (len >= 4) { AV_WN32(dst, v); dst += 4; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
