Commit 8ea2558a authored by Michael Niedermayer's avatar Michael Niedermayer

avutil/mem: Optimize fill32() by unrolling and using 64bit

Reviewed-by: 's avatarMarton Balint <cus@passwd.hu>
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 12b1338b)
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent a06cd028
......@@ -415,6 +415,18 @@ 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;
......
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