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aligned rgba fill

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This commit is contained in:
Ryan Oldenburg 2022-06-15 21:58:06 -05:00
parent acd5a13763
commit cdc52f31ab
1 changed files with 10 additions and 4 deletions
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14
src/pixie/internal.nim
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@ -71,11 +71,17 @@ proc fillUnsafe*(
else: else:
var i = start var i = start
when defined(amd64) and allowSimd: when defined(amd64) and allowSimd:
# Align to 16 bytes
while i < (start + len) and (cast[uint](data[i].addr) and 15) != 0:
data[i] = rgbx
inc i
# When supported, SIMD fill until we run out of room # When supported, SIMD fill until we run out of room
let colorVec = mm_set1_epi32(cast[int32](rgbx)) let
for _ in 0 ..< len div 8: colorVec = mm_set1_epi32(cast[int32](rgbx))
mm_storeu_si128(data[i + 0].addr, colorVec) remaining = start + len - i
mm_storeu_si128(data[i + 4].addr, colorVec) for _ in 0 ..< remaining div 8:
mm_store_si128(data[i + 0].addr, colorVec)
mm_store_si128(data[i + 4].addr, colorVec)
i += 8 i += 8
else: else:
when sizeof(int) == 8: when sizeof(int) == 8: