new simd approach
This commit is contained in:
Ryan Oldenburg
parent
28a880b2b7
commit
9f2c018c9e
5 changed files with 255 additions and 229 deletions
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@ -1,7 +1,10 @@
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import blends, bumpy, chroma, common, masks, pixie/internal, vmath
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import blends, bumpy, chroma, common, masks, internal, vmath
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when defined(amd64) and allowSimd:
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import nimsimd/sse2, runtimechecked/avx2
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when allowSimd:
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import simd
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when defined(amd64):
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import nimsimd/sse2
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const h = 0.5.float32
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@ -101,83 +104,30 @@ proc fill*(image: Image, color: SomeColor) {.inline, raises: [].} =
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proc isOneColor*(image: Image): bool {.raises: [].} =
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## Checks if the entire image is the same color.
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when defined(amd64) and allowSimd:
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if cpuHasAvx2:
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return isOneColorAvx2(image.data, 0, image.data.len)
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when allowSimd and compiles(isOneColorSimd):
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return isOneColorSimd(
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cast[ptr UncheckedArray[ColorRGBX]](image.data[0].addr),
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image.data.len
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)
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result = true
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let color = image.data[0]
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var i: int
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when defined(amd64) and allowSimd:
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# Align to 16 bytes
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var p = cast[uint](image.data[i].addr)
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while i < image.data.len and (p and 15) != 0:
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if image.data[i] != color:
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return false
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inc i
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p += 4
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let
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colorVec = mm_set1_epi32(cast[int32](color))
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iterations = (image.data.len - i) div 16
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for _ in 0 ..< iterations:
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let
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values0 = mm_load_si128(cast[pointer](p))
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values1 = mm_load_si128(cast[pointer](p + 16))
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values2 = mm_load_si128(cast[pointer](p + 32))
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values3 = mm_load_si128(cast[pointer](p + 48))
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eq0 = mm_cmpeq_epi8(values0, colorVec)
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eq1 = mm_cmpeq_epi8(values1, colorVec)
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eq2 = mm_cmpeq_epi8(values2, colorVec)
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eq3 = mm_cmpeq_epi8(values3, colorVec)
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eq0123 = mm_and_si128(mm_and_si128(eq0, eq1), mm_and_si128(eq2, eq3))
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if mm_movemask_epi8(eq0123) != 0xffff:
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return false
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p += 64
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i += 16 * iterations
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for i in i ..< image.data.len:
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if image.data[i] != color:
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let color = cast[uint32](image.data[0])
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for i in 0 ..< image.data.len:
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if cast[uint32](image.data[i]) != color:
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return false
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proc isTransparent*(image: Image): bool {.raises: [].} =
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## Checks if this image is fully transparent or not.
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when defined(amd64) and allowSimd:
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if cpuHasAvx2:
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return isTransparentAvx2(image.data, 0, image.data.len)
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when allowSimd and compiles(isTransparentSimd):
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return isTransparentSimd(
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cast[ptr UncheckedArray[ColorRGBX]](image.data[0].addr),
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image.data.len
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)
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result = true
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var i: int
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when defined(amd64) and allowSimd:
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# Align to 16 bytes
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var p = cast[uint](image.data[i].addr)
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while i < image.data.len and (p and 15) != 0:
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if image.data[i].a != 0:
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return false
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inc i
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p += 4
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let
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vecZero = mm_setzero_si128()
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iterations = (image.data.len - i) div 16
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for _ in 0 ..< iterations:
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let
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values0 = mm_load_si128(cast[pointer](p))
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values1 = mm_load_si128(cast[pointer](p + 16))
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values2 = mm_load_si128(cast[pointer](p + 32))
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values3 = mm_load_si128(cast[pointer](p + 48))
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values01 = mm_or_si128(values0, values1)
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values23 = mm_or_si128(values2, values3)
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values0123 = mm_or_si128(values01, values23)
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if mm_movemask_epi8(mm_cmpeq_epi8(values0123, vecZero)) != 0xffff:
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return false
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p += 64
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i += 16 * iterations
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for i in i ..< image.data.len:
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for i in 0 ..< image.data.len:
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if image.data[i].a != 0:
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return false
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@ -2,11 +2,11 @@ import bumpy, chroma, common, system/memory, vmath
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const allowSimd* = not defined(pixieNoSimd) and not defined(tcc)
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when defined(amd64) and allowSimd:
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import nimsimd/runtimecheck, nimsimd/sse2, runtimechecked/avx, runtimechecked/avx2
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let
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cpuHasAvx* = checkInstructionSets({AVX})
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cpuHasAvx2* = checkInstructionSets({AVX, AVX2})
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when allowSimd:
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import simd
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when defined(amd64):
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import nimsimd/sse2
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template currentExceptionAsPixieError*(): untyped =
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## Gets the current exception and returns it as a PixieError with stack trace.
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@ -81,45 +81,20 @@ proc fillUnsafe*(
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## continuing for len indices.
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let rgbx = color.asRgbx()
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# If we can use AVX, do so
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when defined(amd64) and allowSimd:
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if cpuHasAvx and len >= 64:
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fillUnsafeAvx(data, rgbx, start, len)
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when allowSimd and compiles(fillUnsafeSimd):
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fillUnsafeSimd(
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cast[ptr UncheckedArray[ColorRGBX]](data[start].addr),
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len,
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rgbx
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)
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return
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# Use memset when every byte has the same value
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if rgbx.r == rgbx.g and rgbx.r == rgbx.b and rgbx.r == rgbx.a:
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nimSetMem(data[start].addr, rgbx.r.cint, len * 4)
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else:
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var i = start
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when defined(amd64) and allowSimd:
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# Align to 16 bytes
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var p = cast[uint](data[i].addr)
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while i < (start + len) and (p and 15) != 0:
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data[i] = rgbx
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inc i
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p += 4
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# When supported, SIMD fill until we run out of room
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let
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colorVec = mm_set1_epi32(cast[int32](rgbx))
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iterations = (start + len - i) div 8
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for _ in 0 ..< iterations:
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mm_store_si128(cast[pointer](p), colorVec)
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mm_store_si128(cast[pointer](p + 16), colorVec)
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p += 32
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i += iterations * 8
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else:
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when sizeof(int) == 8:
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# Fill 8 bytes at a time when possible
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var
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u32 = cast[uint32](rgbx)
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u64 = cast[uint64]([u32, u32])
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for _ in 0 ..< len div 2:
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copyMem(data[i].addr, u64.addr, 8)
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i += 2
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# Fill whatever is left the slow way
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for i in i ..< start + len:
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data[i] = rgbx
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for color in data.mitems:
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color = rgbx
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const straightAlphaTable = block:
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var table: array[256, array[256, uint8]]
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@ -141,39 +116,14 @@ proc toStraightAlpha*(data: var seq[ColorRGBA | ColorRGBX]) {.raises: [].} =
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proc toPremultipliedAlpha*(data: var seq[ColorRGBA | ColorRGBX]) {.raises: [].} =
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## Converts an image to premultiplied alpha from straight alpha.
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var i: int
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when defined(amd64) and allowSimd:
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if cpuHasAvx2:
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i = toPremultipliedAlphaAvx2(data)
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else:
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let
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alphaMask = mm_set1_epi32(cast[int32](0xff000000))
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oddMask = mm_set1_epi16(cast[int16](0xff00))
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div255 = mm_set1_epi16(cast[int16](0x8081))
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for _ in 0 ..< data.len div 4:
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let
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values = mm_loadu_si128(data[i].addr)
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alpha = mm_and_si128(values, alphaMask)
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eq = mm_cmpeq_epi8(values, alphaMask)
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if (mm_movemask_epi8(eq) and 0x00008888) != 0x00008888:
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let
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evenMultiplier = mm_or_si128(alpha, mm_srli_epi32(alpha, 16))
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oddMultiplier = mm_or_si128(evenMultiplier, alphaMask)
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var
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colorsEven = mm_slli_epi16(values, 8)
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colorsOdd = mm_and_si128(values, oddMask)
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colorsEven = mm_mulhi_epu16(colorsEven, evenMultiplier)
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colorsOdd = mm_mulhi_epu16(colorsOdd, oddMultiplier)
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colorsEven = mm_srli_epi16(mm_mulhi_epu16(colorsEven, div255), 7)
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colorsOdd = mm_srli_epi16(mm_mulhi_epu16(colorsOdd, div255), 7)
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mm_storeu_si128(
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data[i].addr,
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mm_or_si128(colorsEven, mm_slli_epi16(colorsOdd, 8))
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when allowSimd and compiles(toPremultipliedAlphaSimd):
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toPremultipliedAlphaSimd(
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cast[ptr UncheckedArray[uint32]](data[0].addr),
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data.len
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)
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i += 4
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return
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# Convert whatever is left
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for i in i ..< data.len:
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for i in 0 ..< data.len:
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var c = data[i]
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if c.a != 255:
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c.r = ((c.r.uint32 * c.a) div 255).uint8
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@ -182,41 +132,15 @@ proc toPremultipliedAlpha*(data: var seq[ColorRGBA | ColorRGBX]) {.raises: [].}
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data[i] = c
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proc isOpaque*(data: var seq[ColorRGBX], start, len: int): bool =
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when defined(amd64) and allowSimd:
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if cpuHasAvx2 and len >= 64:
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return isOpaqueAvx2(data, start, len)
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when allowSimd and compiles(isOpaqueSimd):
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return isOpaqueSimd(
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cast[ptr UncheckedArray[ColorRGBX]](data[start].addr),
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len
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)
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result = true
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var i = start
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when defined(amd64) and allowSimd:
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# Align to 16 bytes
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var p = cast[uint](data[i].addr)
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while i < (start + len) and (p and 15) != 0:
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if data[i].a != 255:
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return false
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inc i
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p += 4
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let
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vec255 = mm_set1_epi8(255)
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iterations = (start + len - i) div 16
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for _ in 0 ..< iterations:
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let
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values0 = mm_load_si128(cast[pointer](p))
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values1 = mm_load_si128(cast[pointer](p + 16))
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values2 = mm_load_si128(cast[pointer](p + 32))
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values3 = mm_load_si128(cast[pointer](p + 48))
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values01 = mm_and_si128(values0, values1)
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values23 = mm_and_si128(values2, values3)
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values0123 = mm_and_si128(values01, values23)
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eq = mm_cmpeq_epi8(values0123, vec255)
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if (mm_movemask_epi8(eq) and 0x00008888) != 0x00008888:
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return false
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p += 64
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i += 16 * iterations
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for i in i ..< start + len:
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for i in start ..< start + len:
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if data[i].a != 255:
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return false
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@ -7,28 +7,23 @@ when defined(release):
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{.push checks: off.}
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proc fillUnsafeAvx*(
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data: var seq[ColorRGBX],
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rgbx: ColorRGBX,
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start, len: int
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data: ptr UncheckedArray[ColorRGBX],
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len: int,
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rgbx: ColorRGBX
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) =
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var
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i = start
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p = cast[uint](data[i].addr)
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# Align to 32 bytes
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while i < (start + len) and (p and 31) != 0:
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var i: int
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while i < len and (cast[uint](data[i].addr) and 31) != 0: # Align to 32 bytes
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data[i] = rgbx
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inc i
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p += 4
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# When supported, SIMD fill until we run out of room
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let
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iterations = (start + len - i) div 8
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iterations = (len - i) div 8
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colorVec = mm256_set1_epi32(cast[int32](rgbx))
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for _ in 0 ..< iterations:
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mm256_store_si256(cast[pointer](p), colorVec)
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p += 32
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i += iterations * 8
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mm256_store_si256(data[i].addr, colorVec)
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i += 8
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# Fill whatever is left the slow way
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for i in i ..< start + len:
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for i in i ..< len:
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data[i] = rgbx
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when defined(release):
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@ -6,108 +6,93 @@ when defined(gcc) or defined(clang):
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when defined(release):
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{.push checks: off.}
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proc isOneColorAvx2*(data: var seq[ColorRGBX], start, len: int): bool =
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proc isOneColorAvx2*(data: ptr UncheckedArray[ColorRGBX], len: int): bool =
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result = true
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let color = data[0]
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var
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i = start
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p = cast[uint](data[i].addr)
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# Align to 32 bytes
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while i < (start + len) and (p and 31) != 0:
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var i: int
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while i < len and (cast[uint](data[i].addr) and 31) != 0: # Align to 32 bytes
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if data[i] != color:
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return false
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inc i
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p += 4
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let
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colorVec = mm256_set1_epi32(cast[int32](color))
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iterations = (start + len - i) div 16
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iterations = (len - i) div 16
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for _ in 0 ..< iterations:
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let
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values0 = mm256_load_si256(cast[pointer](p))
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values1 = mm256_load_si256(cast[pointer](p + 32))
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values0 = mm256_load_si256(data[i].addr)
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values1 = mm256_load_si256(data[i + 8].addr)
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eq0 = mm256_cmpeq_epi8(values0, colorVec)
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eq1 = mm256_cmpeq_epi8(values1, colorVec)
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eq01 = mm256_and_si256(eq0, eq1)
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if mm256_movemask_epi8(eq01) != cast[int32](0xffffffff):
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return false
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p += 64
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i += 16 * iterations
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i += 16
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for i in i ..< start + len:
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for i in i ..< len:
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if data[i] != color:
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return false
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proc isTransparentAvx2*(data: var seq[ColorRGBX], start, len: int): bool =
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proc isTransparentAvx2*(data: ptr UncheckedArray[ColorRGBX], len: int): bool =
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result = true
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var
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i = start
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p = cast[uint](data[i].addr)
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# Align to 32 bytes
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while i < (start + len) and (p and 31) != 0:
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var i: int
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while i < len and (cast[uint](data[i].addr) and 31) != 0: # Align to 32 bytes
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if data[i].a != 0:
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return false
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inc i
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p += 4
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let
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vecZero = mm256_setzero_si256()
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iterations = (start + len - i) div 16
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iterations = (len - i) div 16
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for _ in 0 ..< iterations:
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let
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values0 = mm256_load_si256(cast[pointer](p))
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values1 = mm256_load_si256(cast[pointer](p + 32))
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values0 = mm256_load_si256(data[i].addr)
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values1 = mm256_load_si256(data[i + 8].addr)
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values01 = mm256_or_si256(values0, values1)
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eq = mm256_cmpeq_epi8(values01, vecZero)
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if mm256_movemask_epi8(eq) != cast[int32](0xffffffff):
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return false
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p += 64
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i += 16 * iterations
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i += 16
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for i in i ..< start + len:
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for i in i ..< len:
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if data[i].a != 0:
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return false
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proc isOpaqueAvx2*(data: var seq[ColorRGBX], start, len: int): bool =
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proc isOpaqueAvx2*(data: ptr UncheckedArray[ColorRGBX], len: int): bool =
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result = true
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var
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i = start
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p = cast[uint](data[i].addr)
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# Align to 32 bytes
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while i < (start + len) and (p and 31) != 0:
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var i: int
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while i < len and (cast[uint](data[i].addr) and 31) != 0: # Align to 32 bytes
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if data[i].a != 255:
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return false
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inc i
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p += 4
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let
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vec255 = mm256_set1_epi8(255)
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iterations = (start + len - i) div 16
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iterations = (len - i) div 16
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for _ in 0 ..< iterations:
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let
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values0 = mm256_load_si256(cast[pointer](p))
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values1 = mm256_load_si256(cast[pointer](p + 32))
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values0 = mm256_load_si256(data[i].addr)
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values1 = mm256_load_si256(data[i + 8].addr)
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values01 = mm256_and_si256(values0, values1)
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eq = mm256_cmpeq_epi8(values01, vec255)
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if (mm256_movemask_epi8(eq) and 0x88888888) != 0x88888888:
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return false
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p += 64
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i += 16 * iterations
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i += 16
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for i in i ..< start + len:
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for i in i ..< len:
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||||
if data[i].a != 255:
|
||||
return false
|
||||
|
||||
proc toPremultipliedAlphaAvx2*(data: var seq[ColorRGBA | ColorRGBX]): int =
|
||||
proc toPremultipliedAlphaAvx2*(data: ptr UncheckedArray[uint32], len: int): int =
|
||||
let
|
||||
alphaMask = mm256_set1_epi32(cast[int32](0xff000000))
|
||||
oddMask = mm256_set1_epi16(cast[int16](0xff00))
|
||||
div255 = mm256_set1_epi16(cast[int16](0x8081))
|
||||
for _ in 0 ..< data.len div 8:
|
||||
for _ in 0 ..< len div 8:
|
||||
let
|
||||
values = mm256_loadu_si256(data[result].addr)
|
||||
alpha = mm256_and_si256(values, alphaMask)
|
||||
|
|
|
|||
172
src/pixie/simd.nim
Normal file
172
src/pixie/simd.nim
Normal file
|
|
@ -0,0 +1,172 @@
|
|||
import chroma
|
||||
|
||||
when defined(amd64):
|
||||
import nimsimd/runtimecheck, nimsimd/sse2, runtimechecked/avx, runtimechecked/avx2
|
||||
|
||||
let
|
||||
cpuHasAvx* = checkInstructionSets({AVX})
|
||||
cpuHasAvx2* = checkInstructionSets({AVX, AVX2})
|
||||
|
||||
proc fillUnsafeSimd*(
|
||||
data: ptr UncheckedArray[ColorRGBX],
|
||||
len: int,
|
||||
rgbx: ColorRGBX
|
||||
) =
|
||||
if cpuHasAvx and len >= 64:
|
||||
fillUnsafeAvx(data, len, rgbx)
|
||||
else:
|
||||
var i: int
|
||||
while i < len and (cast[uint](data[i].addr) and 15) != 0: # Align to 16 bytes
|
||||
data[i] = rgbx
|
||||
inc i
|
||||
|
||||
let
|
||||
colorVec = mm_set1_epi32(cast[int32](rgbx))
|
||||
iterations = (len - i) div 8
|
||||
for _ in 0 ..< iterations:
|
||||
mm_store_si128(data[i].addr, colorVec)
|
||||
mm_store_si128(data[i + 4].addr, colorVec)
|
||||
i += 8
|
||||
|
||||
for i in i ..< len:
|
||||
data[i] = rgbx
|
||||
|
||||
proc isOneColorSimd*(data: ptr UncheckedArray[ColorRGBX], len: int): bool =
|
||||
if cpuHasAvx2:
|
||||
return isOneColorAvx2(data, len)
|
||||
|
||||
result = true
|
||||
|
||||
let color = data[0]
|
||||
|
||||
var i: int
|
||||
while i < len and (cast[uint](data[i].addr) and 15) != 0: # Align to 16 bytes
|
||||
if data[i] != color:
|
||||
return false
|
||||
inc i
|
||||
|
||||
let
|
||||
colorVec = mm_set1_epi32(cast[int32](color))
|
||||
iterations = (len - i) div 16
|
||||
for _ in 0 ..< iterations:
|
||||
let
|
||||
values0 = mm_load_si128(data[i].addr)
|
||||
values1 = mm_load_si128(data[i + 4].addr)
|
||||
values2 = mm_load_si128(data[i + 8].addr)
|
||||
values3 = mm_load_si128(data[i + 12].addr)
|
||||
eq0 = mm_cmpeq_epi8(values0, colorVec)
|
||||
eq1 = mm_cmpeq_epi8(values1, colorVec)
|
||||
eq2 = mm_cmpeq_epi8(values2, colorVec)
|
||||
eq3 = mm_cmpeq_epi8(values3, colorVec)
|
||||
eq0123 = mm_and_si128(mm_and_si128(eq0, eq1), mm_and_si128(eq2, eq3))
|
||||
if mm_movemask_epi8(eq0123) != 0xffff:
|
||||
return false
|
||||
i += 16
|
||||
|
||||
for i in i ..< len:
|
||||
if data[i] != color:
|
||||
return false
|
||||
|
||||
proc isTransparentSimd*(data: ptr UncheckedArray[ColorRGBX], len: int): bool =
|
||||
if cpuHasAvx2:
|
||||
return isTransparentAvx2(data, len)
|
||||
|
||||
var i: int
|
||||
while i < len and (cast[uint](data[i].addr) and 15) != 0: # Align to 16 bytes
|
||||
if data[i].a != 0:
|
||||
return false
|
||||
inc i
|
||||
|
||||
result = true
|
||||
|
||||
let
|
||||
vecZero = mm_setzero_si128()
|
||||
iterations = (len - i) div 16
|
||||
for _ in 0 ..< iterations:
|
||||
let
|
||||
values0 = mm_load_si128(data[i].addr)
|
||||
values1 = mm_load_si128(data[i + 4].addr)
|
||||
values2 = mm_load_si128(data[i + 8].addr)
|
||||
values3 = mm_load_si128(data[i + 12].addr)
|
||||
values01 = mm_or_si128(values0, values1)
|
||||
values23 = mm_or_si128(values2, values3)
|
||||
values0123 = mm_or_si128(values01, values23)
|
||||
if mm_movemask_epi8(mm_cmpeq_epi8(values0123, vecZero)) != 0xffff:
|
||||
return false
|
||||
i += 16
|
||||
|
||||
for i in i ..< len:
|
||||
if data[i].a != 0:
|
||||
return false
|
||||
|
||||
proc isOpaqueSimd*(data: ptr UncheckedArray[ColorRGBX], len: int): bool =
|
||||
if cpuHasAvx2:
|
||||
return isOpaqueAvx2(data, len)
|
||||
|
||||
result = true
|
||||
|
||||
var i: int
|
||||
while i < len and (cast[uint](data[i].addr) and 15) != 0: # Align to 16 bytes
|
||||
if data[i].a != 255:
|
||||
return false
|
||||
inc i
|
||||
|
||||
let
|
||||
vec255 = mm_set1_epi8(255)
|
||||
iterations = (len - i) div 16
|
||||
for _ in 0 ..< iterations:
|
||||
let
|
||||
values0 = mm_load_si128(data[i].addr)
|
||||
values1 = mm_load_si128(data[i + 4].addr)
|
||||
values2 = mm_load_si128(data[i + 8].addr)
|
||||
values3 = mm_load_si128(data[i + 12].addr)
|
||||
values01 = mm_and_si128(values0, values1)
|
||||
values23 = mm_and_si128(values2, values3)
|
||||
values0123 = mm_and_si128(values01, values23)
|
||||
eq = mm_cmpeq_epi8(values0123, vec255)
|
||||
if (mm_movemask_epi8(eq) and 0x00008888) != 0x00008888:
|
||||
return false
|
||||
i += 16
|
||||
|
||||
for i in i ..< len:
|
||||
if data[i].a != 255:
|
||||
return false
|
||||
|
||||
proc toPremultipliedAlphaSimd*(data: ptr UncheckedArray[uint32], len: int) =
|
||||
var i: int
|
||||
if cpuHasAvx2:
|
||||
i = toPremultipliedAlphaAvx2(data, len)
|
||||
else:
|
||||
let
|
||||
alphaMask = mm_set1_epi32(cast[int32](0xff000000))
|
||||
oddMask = mm_set1_epi16(cast[int16](0xff00))
|
||||
div255 = mm_set1_epi16(cast[int16](0x8081))
|
||||
for _ in 0 ..< len div 4:
|
||||
let
|
||||
values = mm_loadu_si128(data[i].addr)
|
||||
alpha = mm_and_si128(values, alphaMask)
|
||||
eq = mm_cmpeq_epi8(values, alphaMask)
|
||||
if (mm_movemask_epi8(eq) and 0x00008888) != 0x00008888:
|
||||
let
|
||||
evenMultiplier = mm_or_si128(alpha, mm_srli_epi32(alpha, 16))
|
||||
oddMultiplier = mm_or_si128(evenMultiplier, alphaMask)
|
||||
var
|
||||
colorsEven = mm_slli_epi16(values, 8)
|
||||
colorsOdd = mm_and_si128(values, oddMask)
|
||||
colorsEven = mm_mulhi_epu16(colorsEven, evenMultiplier)
|
||||
colorsOdd = mm_mulhi_epu16(colorsOdd, oddMultiplier)
|
||||
colorsEven = mm_srli_epi16(mm_mulhi_epu16(colorsEven, div255), 7)
|
||||
colorsOdd = mm_srli_epi16(mm_mulhi_epu16(colorsOdd, div255), 7)
|
||||
mm_storeu_si128(
|
||||
data[i].addr,
|
||||
mm_or_si128(colorsEven, mm_slli_epi16(colorsOdd, 8))
|
||||
)
|
||||
i += 4
|
||||
|
||||
for i in i ..< len:
|
||||
var c: ColorRGBX
|
||||
copyMem(c.addr, data[i].addr, 4)
|
||||
c.r = ((c.r.uint32 * c.a) div 255).uint8
|
||||
c.g = ((c.g.uint32 * c.a) div 255).uint8
|
||||
c.b = ((c.b.uint32 * c.a) div 255).uint8
|
||||
copyMem(data[i].addr, c.addr, 4)
|
||||
Loading…
Reference in a new issue