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avutil/mem: Optimize fill32() by unrolling and using 64bit
Reviewed-by: Marton Balint <cus@passwd.hu> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -399,6 +399,18 @@ static void fill32(uint8_t *dst, int len)
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{
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{
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uint32_t v = AV_RN32(dst - 4);
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uint32_t v = AV_RN32(dst - 4);
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#if HAVE_FAST_64BIT
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uint64_t v2= v + ((uint64_t)v<<32);
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while (len >= 32) {
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AV_WN64(dst , v2);
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AV_WN64(dst+ 8, v2);
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AV_WN64(dst+16, v2);
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AV_WN64(dst+24, v2);
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dst += 32;
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len -= 32;
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}
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#endif
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while (len >= 4) {
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while (len >= 4) {
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AV_WN32(dst, v);
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AV_WN32(dst, v);
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dst += 4;
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dst += 4;
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