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This commit is contained in:
Ryan Oldenburg 2022-07-30 21:01:44 -05:00
parent 271101edeb
commit d9be882fe2
1 changed files with 2 additions and 4 deletions
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6
src/pixie/simd/sse2.nim
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@ -535,6 +535,7 @@ proc blitLineNormalSse2*(
oddMask = mm_set1_epi16(cast[int16](0xff00)) oddMask = mm_set1_epi16(cast[int16](0xff00))
div255 = mm_set1_epi16(cast[int16](0x8081)) div255 = mm_set1_epi16(cast[int16](0x8081))
vec255 = mm_set1_epi8(255) vec255 = mm_set1_epi8(255)
vecAlpha255 = mm_set1_epi32(cast[int32]([0.uint8, 255, 0, 255]))
var i: int var i: int
while i < len - 4: while i < len - 4:
@ -553,10 +554,7 @@ proc blitLineNormalSse2*(
sourceAlpha = mm_or_si128(sourceAlpha, mm_srli_epi32(sourceAlpha, 16)) sourceAlpha = mm_or_si128(sourceAlpha, mm_srli_epi32(sourceAlpha, 16))
let multiplier = mm_sub_epi32( let multiplier = mm_sub_epi32(vecAlpha255, sourceAlpha)
mm_set1_epi32(cast[int32]([0.uint8, 255, 0, 255])),
sourceAlpha
)
backdropEven = mm_mulhi_epu16(backdropEven, multiplier) backdropEven = mm_mulhi_epu16(backdropEven, multiplier)
backdropOdd = mm_mulhi_epu16(backdropOdd, multiplier) backdropOdd = mm_mulhi_epu16(backdropOdd, multiplier)