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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-01-17 22:35:10 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-01-20 21:42:20 +0100 |
| commit | 12b1338be376a3e5fb606d9fe41b58dc4a9e62c7 (patch) | |
| tree | d464cabc298b2d6f4385986e6d227d0eb8353d76 | |
| parent | 32421602dfb18c58a9563b748c199955fc158abc (diff) | |
| download | ffmpeg-12b1338be376a3e5fb606d9fe41b58dc4a9e62c7.tar.gz | |
avutil/mem: Optimize fill32() by unrolling and using 64bit
Reviewed-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavutil/mem.c | 12 |
1 files changed, 12 insertions, 0 deletions
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; |