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author | Christopher Speller <crspeller@gmail.com> | 2018-04-16 05:37:14 -0700 |
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committer | Joram Wilander <jwawilander@gmail.com> | 2018-04-16 08:37:14 -0400 |
commit | 6e2cb00008cbf09e556b00f87603797fcaa47e09 (patch) | |
tree | 3c0eb55ff4226a3f024aad373140d1fb860a6404 /vendor/golang.org/x/image/vector/acc_amd64.s | |
parent | bf24f51c4e1cc6286885460672f7f449e8c6f5ef (diff) | |
download | chat-6e2cb00008cbf09e556b00f87603797fcaa47e09.tar.gz chat-6e2cb00008cbf09e556b00f87603797fcaa47e09.tar.bz2 chat-6e2cb00008cbf09e556b00f87603797fcaa47e09.zip |
Depenancy upgrades and movign to dep. (#8630)
Diffstat (limited to 'vendor/golang.org/x/image/vector/acc_amd64.s')
-rw-r--r-- | vendor/golang.org/x/image/vector/acc_amd64.s | 1083 |
1 files changed, 0 insertions, 1083 deletions
diff --git a/vendor/golang.org/x/image/vector/acc_amd64.s b/vendor/golang.org/x/image/vector/acc_amd64.s deleted file mode 100644 index 6a424bcdd..000000000 --- a/vendor/golang.org/x/image/vector/acc_amd64.s +++ /dev/null @@ -1,1083 +0,0 @@ -// generated by go run gen.go; DO NOT EDIT - -// +build !appengine -// +build gc -// +build go1.6 -// +build !noasm - -#include "textflag.h" - -// fl is short for floating point math. fx is short for fixed point math. - -DATA flAlmost65536<>+0x00(SB)/8, $0x477fffff477fffff -DATA flAlmost65536<>+0x08(SB)/8, $0x477fffff477fffff -DATA flOne<>+0x00(SB)/8, $0x3f8000003f800000 -DATA flOne<>+0x08(SB)/8, $0x3f8000003f800000 -DATA flSignMask<>+0x00(SB)/8, $0x7fffffff7fffffff -DATA flSignMask<>+0x08(SB)/8, $0x7fffffff7fffffff - -// scatterAndMulBy0x101 is a PSHUFB mask that brings the low four bytes of an -// XMM register to the low byte of that register's four uint32 values. It -// duplicates those bytes, effectively multiplying each uint32 by 0x101. -// -// It transforms a little-endian 16-byte XMM value from -// ijkl???????????? -// to -// ii00jj00kk00ll00 -DATA scatterAndMulBy0x101<>+0x00(SB)/8, $0x8080010180800000 -DATA scatterAndMulBy0x101<>+0x08(SB)/8, $0x8080030380800202 - -// gather is a PSHUFB mask that brings the second-lowest byte of the XMM -// register's four uint32 values to the low four bytes of that register. -// -// It transforms a little-endian 16-byte XMM value from -// ?i???j???k???l?? -// to -// ijkl000000000000 -DATA gather<>+0x00(SB)/8, $0x808080800d090501 -DATA gather<>+0x08(SB)/8, $0x8080808080808080 - -DATA fxAlmost65536<>+0x00(SB)/8, $0x0000ffff0000ffff -DATA fxAlmost65536<>+0x08(SB)/8, $0x0000ffff0000ffff -DATA inverseFFFF<>+0x00(SB)/8, $0x8000800180008001 -DATA inverseFFFF<>+0x08(SB)/8, $0x8000800180008001 - -GLOBL flAlmost65536<>(SB), (NOPTR+RODATA), $16 -GLOBL flOne<>(SB), (NOPTR+RODATA), $16 -GLOBL flSignMask<>(SB), (NOPTR+RODATA), $16 -GLOBL scatterAndMulBy0x101<>(SB), (NOPTR+RODATA), $16 -GLOBL gather<>(SB), (NOPTR+RODATA), $16 -GLOBL fxAlmost65536<>(SB), (NOPTR+RODATA), $16 -GLOBL inverseFFFF<>(SB), (NOPTR+RODATA), $16 - -// func haveSSE4_1() bool -TEXT ·haveSSE4_1(SB), NOSPLIT, $0 - MOVQ $1, AX - CPUID - SHRQ $19, CX - ANDQ $1, CX - MOVB CX, ret+0(FP) - RET - -// ---------------------------------------------------------------------------- - -// func fixedAccumulateOpOverSIMD(dst []uint8, src []uint32) -// -// XMM registers. Variable names are per -// https://github.com/google/font-rs/blob/master/src/accumulate.c -// -// xmm0 scratch -// xmm1 x -// xmm2 y, z -// xmm3 - -// xmm4 - -// xmm5 fxAlmost65536 -// xmm6 gather -// xmm7 offset -// xmm8 scatterAndMulBy0x101 -// xmm9 fxAlmost65536 -// xmm10 inverseFFFF -TEXT ·fixedAccumulateOpOverSIMD(SB), NOSPLIT, $0-48 - - MOVQ dst_base+0(FP), DI - MOVQ dst_len+8(FP), BX - MOVQ src_base+24(FP), SI - MOVQ src_len+32(FP), R10 - - // Sanity check that len(dst) >= len(src). - CMPQ BX, R10 - JLT fxAccOpOverEnd - - // R10 = len(src) &^ 3 - // R11 = len(src) - MOVQ R10, R11 - ANDQ $-4, R10 - - // fxAlmost65536 := XMM(0x0000ffff repeated four times) // Maximum of an uint16. - MOVOU fxAlmost65536<>(SB), X5 - - // gather := XMM(see above) // PSHUFB shuffle mask. - // scatterAndMulBy0x101 := XMM(see above) // PSHUFB shuffle mask. - // fxAlmost65536 := XMM(0x0000ffff repeated four times) // 0xffff. - // inverseFFFF := XMM(0x80008001 repeated four times) // Magic constant for dividing by 0xffff. - MOVOU gather<>(SB), X6 - MOVOU scatterAndMulBy0x101<>(SB), X8 - MOVOU fxAlmost65536<>(SB), X9 - MOVOU inverseFFFF<>(SB), X10 - - // offset := XMM(0x00000000 repeated four times) // Cumulative sum. - XORPS X7, X7 - - // i := 0 - MOVQ $0, R9 - -fxAccOpOverLoop4: - // for i < (len(src) &^ 3) - CMPQ R9, R10 - JAE fxAccOpOverLoop1 - - // x = XMM(s0, s1, s2, s3) - // - // Where s0 is src[i+0], s1 is src[i+1], etc. - MOVOU (SI), X1 - - // scratch = XMM(0, s0, s1, s2) - // x += scratch // yields x == XMM(s0, s0+s1, s1+s2, s2+s3) - MOVOU X1, X0 - PSLLO $4, X0 - PADDD X0, X1 - - // scratch = XMM(0, 0, 0, 0) - // scratch = XMM(scratch@0, scratch@0, x@0, x@1) // yields scratch == XMM(0, 0, s0, s0+s1) - // x += scratch // yields x == XMM(s0, s0+s1, s0+s1+s2, s0+s1+s2+s3) - XORPS X0, X0 - SHUFPS $0x40, X1, X0 - PADDD X0, X1 - - // x += offset - PADDD X7, X1 - - // y = abs(x) - // y >>= 2 // Shift by 2*ϕ - 16. - // y = min(y, fxAlmost65536) - // - // pabsd %xmm1,%xmm2 - // psrld $0x2,%xmm2 - // pminud %xmm5,%xmm2 - // - // Hopefully we'll get these opcode mnemonics into the assembler for Go - // 1.8. https://golang.org/issue/16007 isn't exactly the same thing, but - // it's similar. - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x1e; BYTE $0xd1 - BYTE $0x66; BYTE $0x0f; BYTE $0x72; BYTE $0xd2; BYTE $0x02 - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x3b; BYTE $0xd5 - - // z = convertToInt32(y) - // No-op. - - // Blend over the dst's prior value. SIMD for i in 0..3: - // - // dstA := uint32(dst[i]) * 0x101 - // maskA := z@i - // outA := dstA*(0xffff-maskA)/0xffff + maskA - // dst[i] = uint8(outA >> 8) - // - // First, set X0 to dstA*(0xfff-maskA). - MOVL (DI), X0 - PSHUFB X8, X0 - MOVOU X9, X11 - PSUBL X2, X11 - PMULLD X11, X0 - - // We implement uint32 division by 0xffff as multiplication by a magic - // constant (0x800080001) and then a shift by a magic constant (47). - // See TestDivideByFFFF for a justification. - // - // That multiplication widens from uint32 to uint64, so we have to - // duplicate and shift our four uint32s from one XMM register (X0) to - // two XMM registers (X0 and X11). - // - // Move the second and fourth uint32s in X0 to be the first and third - // uint32s in X11. - MOVOU X0, X11 - PSRLQ $32, X11 - - // Multiply by magic, shift by magic. - // - // pmuludq %xmm10,%xmm0 - // pmuludq %xmm10,%xmm11 - BYTE $0x66; BYTE $0x41; BYTE $0x0f; BYTE $0xf4; BYTE $0xc2 - BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0xf4; BYTE $0xda - PSRLQ $47, X0 - PSRLQ $47, X11 - - // Merge the two registers back to one, X11, and add maskA. - PSLLQ $32, X11 - XORPS X0, X11 - PADDD X11, X2 - - // As per opSrcStore4, shuffle and copy the 4 second-lowest bytes. - PSHUFB X6, X2 - MOVL X2, (DI) - - // offset = XMM(x@3, x@3, x@3, x@3) - MOVOU X1, X7 - SHUFPS $0xff, X1, X7 - - // i += 4 - // dst = dst[4:] - // src = src[4:] - ADDQ $4, R9 - ADDQ $4, DI - ADDQ $16, SI - JMP fxAccOpOverLoop4 - -fxAccOpOverLoop1: - // for i < len(src) - CMPQ R9, R11 - JAE fxAccOpOverEnd - - // x = src[i] + offset - MOVL (SI), X1 - PADDD X7, X1 - - // y = abs(x) - // y >>= 2 // Shift by 2*ϕ - 16. - // y = min(y, fxAlmost65536) - // - // pabsd %xmm1,%xmm2 - // psrld $0x2,%xmm2 - // pminud %xmm5,%xmm2 - // - // Hopefully we'll get these opcode mnemonics into the assembler for Go - // 1.8. https://golang.org/issue/16007 isn't exactly the same thing, but - // it's similar. - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x1e; BYTE $0xd1 - BYTE $0x66; BYTE $0x0f; BYTE $0x72; BYTE $0xd2; BYTE $0x02 - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x3b; BYTE $0xd5 - - // z = convertToInt32(y) - // No-op. - - // Blend over the dst's prior value. - // - // dstA := uint32(dst[0]) * 0x101 - // maskA := z - // outA := dstA*(0xffff-maskA)/0xffff + maskA - // dst[0] = uint8(outA >> 8) - MOVBLZX (DI), R12 - IMULL $0x101, R12 - MOVL X2, R13 - MOVL $0xffff, AX - SUBL R13, AX - MULL R12 // MULL's implicit arg is AX, and the result is stored in DX:AX. - MOVL $0x80008001, BX // Divide by 0xffff is to first multiply by a magic constant... - MULL BX // MULL's implicit arg is AX, and the result is stored in DX:AX. - SHRL $15, DX // ...and then shift by another magic constant (47 - 32 = 15). - ADDL DX, R13 - SHRL $8, R13 - MOVB R13, (DI) - - // offset = x - MOVOU X1, X7 - - // i += 1 - // dst = dst[1:] - // src = src[1:] - ADDQ $1, R9 - ADDQ $1, DI - ADDQ $4, SI - JMP fxAccOpOverLoop1 - -fxAccOpOverEnd: - RET - -// ---------------------------------------------------------------------------- - -// func fixedAccumulateOpSrcSIMD(dst []uint8, src []uint32) -// -// XMM registers. Variable names are per -// https://github.com/google/font-rs/blob/master/src/accumulate.c -// -// xmm0 scratch -// xmm1 x -// xmm2 y, z -// xmm3 - -// xmm4 - -// xmm5 fxAlmost65536 -// xmm6 gather -// xmm7 offset -// xmm8 - -// xmm9 - -// xmm10 - -TEXT ·fixedAccumulateOpSrcSIMD(SB), NOSPLIT, $0-48 - - MOVQ dst_base+0(FP), DI - MOVQ dst_len+8(FP), BX - MOVQ src_base+24(FP), SI - MOVQ src_len+32(FP), R10 - - // Sanity check that len(dst) >= len(src). - CMPQ BX, R10 - JLT fxAccOpSrcEnd - - // R10 = len(src) &^ 3 - // R11 = len(src) - MOVQ R10, R11 - ANDQ $-4, R10 - - // fxAlmost65536 := XMM(0x0000ffff repeated four times) // Maximum of an uint16. - MOVOU fxAlmost65536<>(SB), X5 - - // gather := XMM(see above) // PSHUFB shuffle mask. - MOVOU gather<>(SB), X6 - - // offset := XMM(0x00000000 repeated four times) // Cumulative sum. - XORPS X7, X7 - - // i := 0 - MOVQ $0, R9 - -fxAccOpSrcLoop4: - // for i < (len(src) &^ 3) - CMPQ R9, R10 - JAE fxAccOpSrcLoop1 - - // x = XMM(s0, s1, s2, s3) - // - // Where s0 is src[i+0], s1 is src[i+1], etc. - MOVOU (SI), X1 - - // scratch = XMM(0, s0, s1, s2) - // x += scratch // yields x == XMM(s0, s0+s1, s1+s2, s2+s3) - MOVOU X1, X0 - PSLLO $4, X0 - PADDD X0, X1 - - // scratch = XMM(0, 0, 0, 0) - // scratch = XMM(scratch@0, scratch@0, x@0, x@1) // yields scratch == XMM(0, 0, s0, s0+s1) - // x += scratch // yields x == XMM(s0, s0+s1, s0+s1+s2, s0+s1+s2+s3) - XORPS X0, X0 - SHUFPS $0x40, X1, X0 - PADDD X0, X1 - - // x += offset - PADDD X7, X1 - - // y = abs(x) - // y >>= 2 // Shift by 2*ϕ - 16. - // y = min(y, fxAlmost65536) - // - // pabsd %xmm1,%xmm2 - // psrld $0x2,%xmm2 - // pminud %xmm5,%xmm2 - // - // Hopefully we'll get these opcode mnemonics into the assembler for Go - // 1.8. https://golang.org/issue/16007 isn't exactly the same thing, but - // it's similar. - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x1e; BYTE $0xd1 - BYTE $0x66; BYTE $0x0f; BYTE $0x72; BYTE $0xd2; BYTE $0x02 - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x3b; BYTE $0xd5 - - // z = convertToInt32(y) - // No-op. - - // z = shuffleTheSecondLowestBytesOfEach4ByteElement(z) - // copy(dst[:4], low4BytesOf(z)) - PSHUFB X6, X2 - MOVL X2, (DI) - - // offset = XMM(x@3, x@3, x@3, x@3) - MOVOU X1, X7 - SHUFPS $0xff, X1, X7 - - // i += 4 - // dst = dst[4:] - // src = src[4:] - ADDQ $4, R9 - ADDQ $4, DI - ADDQ $16, SI - JMP fxAccOpSrcLoop4 - -fxAccOpSrcLoop1: - // for i < len(src) - CMPQ R9, R11 - JAE fxAccOpSrcEnd - - // x = src[i] + offset - MOVL (SI), X1 - PADDD X7, X1 - - // y = abs(x) - // y >>= 2 // Shift by 2*ϕ - 16. - // y = min(y, fxAlmost65536) - // - // pabsd %xmm1,%xmm2 - // psrld $0x2,%xmm2 - // pminud %xmm5,%xmm2 - // - // Hopefully we'll get these opcode mnemonics into the assembler for Go - // 1.8. https://golang.org/issue/16007 isn't exactly the same thing, but - // it's similar. - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x1e; BYTE $0xd1 - BYTE $0x66; BYTE $0x0f; BYTE $0x72; BYTE $0xd2; BYTE $0x02 - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x3b; BYTE $0xd5 - - // z = convertToInt32(y) - // No-op. - - // dst[0] = uint8(z>>8) - MOVL X2, BX - SHRL $8, BX - MOVB BX, (DI) - - // offset = x - MOVOU X1, X7 - - // i += 1 - // dst = dst[1:] - // src = src[1:] - ADDQ $1, R9 - ADDQ $1, DI - ADDQ $4, SI - JMP fxAccOpSrcLoop1 - -fxAccOpSrcEnd: - RET - -// ---------------------------------------------------------------------------- - -// func fixedAccumulateMaskSIMD(buf []uint32) -// -// XMM registers. Variable names are per -// https://github.com/google/font-rs/blob/master/src/accumulate.c -// -// xmm0 scratch -// xmm1 x -// xmm2 y, z -// xmm3 - -// xmm4 - -// xmm5 fxAlmost65536 -// xmm6 - -// xmm7 offset -// xmm8 - -// xmm9 - -// xmm10 - -TEXT ·fixedAccumulateMaskSIMD(SB), NOSPLIT, $0-24 - - MOVQ buf_base+0(FP), DI - MOVQ buf_len+8(FP), BX - MOVQ buf_base+0(FP), SI - MOVQ buf_len+8(FP), R10 - - // R10 = len(src) &^ 3 - // R11 = len(src) - MOVQ R10, R11 - ANDQ $-4, R10 - - // fxAlmost65536 := XMM(0x0000ffff repeated four times) // Maximum of an uint16. - MOVOU fxAlmost65536<>(SB), X5 - - // offset := XMM(0x00000000 repeated four times) // Cumulative sum. - XORPS X7, X7 - - // i := 0 - MOVQ $0, R9 - -fxAccMaskLoop4: - // for i < (len(src) &^ 3) - CMPQ R9, R10 - JAE fxAccMaskLoop1 - - // x = XMM(s0, s1, s2, s3) - // - // Where s0 is src[i+0], s1 is src[i+1], etc. - MOVOU (SI), X1 - - // scratch = XMM(0, s0, s1, s2) - // x += scratch // yields x == XMM(s0, s0+s1, s1+s2, s2+s3) - MOVOU X1, X0 - PSLLO $4, X0 - PADDD X0, X1 - - // scratch = XMM(0, 0, 0, 0) - // scratch = XMM(scratch@0, scratch@0, x@0, x@1) // yields scratch == XMM(0, 0, s0, s0+s1) - // x += scratch // yields x == XMM(s0, s0+s1, s0+s1+s2, s0+s1+s2+s3) - XORPS X0, X0 - SHUFPS $0x40, X1, X0 - PADDD X0, X1 - - // x += offset - PADDD X7, X1 - - // y = abs(x) - // y >>= 2 // Shift by 2*ϕ - 16. - // y = min(y, fxAlmost65536) - // - // pabsd %xmm1,%xmm2 - // psrld $0x2,%xmm2 - // pminud %xmm5,%xmm2 - // - // Hopefully we'll get these opcode mnemonics into the assembler for Go - // 1.8. https://golang.org/issue/16007 isn't exactly the same thing, but - // it's similar. - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x1e; BYTE $0xd1 - BYTE $0x66; BYTE $0x0f; BYTE $0x72; BYTE $0xd2; BYTE $0x02 - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x3b; BYTE $0xd5 - - // z = convertToInt32(y) - // No-op. - - // copy(dst[:4], z) - MOVOU X2, (DI) - - // offset = XMM(x@3, x@3, x@3, x@3) - MOVOU X1, X7 - SHUFPS $0xff, X1, X7 - - // i += 4 - // dst = dst[4:] - // src = src[4:] - ADDQ $4, R9 - ADDQ $16, DI - ADDQ $16, SI - JMP fxAccMaskLoop4 - -fxAccMaskLoop1: - // for i < len(src) - CMPQ R9, R11 - JAE fxAccMaskEnd - - // x = src[i] + offset - MOVL (SI), X1 - PADDD X7, X1 - - // y = abs(x) - // y >>= 2 // Shift by 2*ϕ - 16. - // y = min(y, fxAlmost65536) - // - // pabsd %xmm1,%xmm2 - // psrld $0x2,%xmm2 - // pminud %xmm5,%xmm2 - // - // Hopefully we'll get these opcode mnemonics into the assembler for Go - // 1.8. https://golang.org/issue/16007 isn't exactly the same thing, but - // it's similar. - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x1e; BYTE $0xd1 - BYTE $0x66; BYTE $0x0f; BYTE $0x72; BYTE $0xd2; BYTE $0x02 - BYTE $0x66; BYTE $0x0f; BYTE $0x38; BYTE $0x3b; BYTE $0xd5 - - // z = convertToInt32(y) - // No-op. - - // dst[0] = uint32(z) - MOVL X2, (DI) - - // offset = x - MOVOU X1, X7 - - // i += 1 - // dst = dst[1:] - // src = src[1:] - ADDQ $1, R9 - ADDQ $4, DI - ADDQ $4, SI - JMP fxAccMaskLoop1 - -fxAccMaskEnd: - RET - -// ---------------------------------------------------------------------------- - -// func floatingAccumulateOpOverSIMD(dst []uint8, src []float32) -// -// XMM registers. Variable names are per -// https://github.com/google/font-rs/blob/master/src/accumulate.c -// -// xmm0 scratch -// xmm1 x -// xmm2 y, z -// xmm3 flSignMask -// xmm4 flOne -// xmm5 flAlmost65536 -// xmm6 gather -// xmm7 offset -// xmm8 scatterAndMulBy0x101 -// xmm9 fxAlmost65536 -// xmm10 inverseFFFF -TEXT ·floatingAccumulateOpOverSIMD(SB), NOSPLIT, $8-48 - - MOVQ dst_base+0(FP), DI - MOVQ dst_len+8(FP), BX - MOVQ src_base+24(FP), SI - MOVQ src_len+32(FP), R10 - - // Sanity check that len(dst) >= len(src). - CMPQ BX, R10 - JLT flAccOpOverEnd - - // R10 = len(src) &^ 3 - // R11 = len(src) - MOVQ R10, R11 - ANDQ $-4, R10 - - // Prepare to set MXCSR bits 13 and 14, so that the CVTPS2PL below is - // "Round To Zero". - STMXCSR mxcsrOrig-8(SP) - MOVL mxcsrOrig-8(SP), AX - ORL $0x6000, AX - MOVL AX, mxcsrNew-4(SP) - - // flSignMask := XMM(0x7fffffff repeated four times) // All but the sign bit of a float32. - // flOne := XMM(0x3f800000 repeated four times) // 1 as a float32. - // flAlmost65536 := XMM(0x477fffff repeated four times) // 255.99998 * 256 as a float32. - MOVOU flSignMask<>(SB), X3 - MOVOU flOne<>(SB), X4 - MOVOU flAlmost65536<>(SB), X5 - - // gather := XMM(see above) // PSHUFB shuffle mask. - // scatterAndMulBy0x101 := XMM(see above) // PSHUFB shuffle mask. - // fxAlmost65536 := XMM(0x0000ffff repeated four times) // 0xffff. - // inverseFFFF := XMM(0x80008001 repeated four times) // Magic constant for dividing by 0xffff. - MOVOU gather<>(SB), X6 - MOVOU scatterAndMulBy0x101<>(SB), X8 - MOVOU fxAlmost65536<>(SB), X9 - MOVOU inverseFFFF<>(SB), X10 - - // offset := XMM(0x00000000 repeated four times) // Cumulative sum. - XORPS X7, X7 - - // i := 0 - MOVQ $0, R9 - -flAccOpOverLoop4: - // for i < (len(src) &^ 3) - CMPQ R9, R10 - JAE flAccOpOverLoop1 - - // x = XMM(s0, s1, s2, s3) - // - // Where s0 is src[i+0], s1 is src[i+1], etc. - MOVOU (SI), X1 - - // scratch = XMM(0, s0, s1, s2) - // x += scratch // yields x == XMM(s0, s0+s1, s1+s2, s2+s3) - MOVOU X1, X0 - PSLLO $4, X0 - ADDPS X0, X1 - - // scratch = XMM(0, 0, 0, 0) - // scratch = XMM(scratch@0, scratch@0, x@0, x@1) // yields scratch == XMM(0, 0, s0, s0+s1) - // x += scratch // yields x == XMM(s0, s0+s1, s0+s1+s2, s0+s1+s2+s3) - XORPS X0, X0 - SHUFPS $0x40, X1, X0 - ADDPS X0, X1 - - // x += offset - ADDPS X7, X1 - - // y = x & flSignMask - // y = min(y, flOne) - // y = mul(y, flAlmost65536) - MOVOU X3, X2 - ANDPS X1, X2 - MINPS X4, X2 - MULPS X5, X2 - - // z = convertToInt32(y) - LDMXCSR mxcsrNew-4(SP) - CVTPS2PL X2, X2 - LDMXCSR mxcsrOrig-8(SP) - - // Blend over the dst's prior value. SIMD for i in 0..3: - // - // dstA := uint32(dst[i]) * 0x101 - // maskA := z@i - // outA := dstA*(0xffff-maskA)/0xffff + maskA - // dst[i] = uint8(outA >> 8) - // - // First, set X0 to dstA*(0xfff-maskA). - MOVL (DI), X0 - PSHUFB X8, X0 - MOVOU X9, X11 - PSUBL X2, X11 - PMULLD X11, X0 - - // We implement uint32 division by 0xffff as multiplication by a magic - // constant (0x800080001) and then a shift by a magic constant (47). - // See TestDivideByFFFF for a justification. - // - // That multiplication widens from uint32 to uint64, so we have to - // duplicate and shift our four uint32s from one XMM register (X0) to - // two XMM registers (X0 and X11). - // - // Move the second and fourth uint32s in X0 to be the first and third - // uint32s in X11. - MOVOU X0, X11 - PSRLQ $32, X11 - - // Multiply by magic, shift by magic. - // - // pmuludq %xmm10,%xmm0 - // pmuludq %xmm10,%xmm11 - BYTE $0x66; BYTE $0x41; BYTE $0x0f; BYTE $0xf4; BYTE $0xc2 - BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0xf4; BYTE $0xda - PSRLQ $47, X0 - PSRLQ $47, X11 - - // Merge the two registers back to one, X11, and add maskA. - PSLLQ $32, X11 - XORPS X0, X11 - PADDD X11, X2 - - // As per opSrcStore4, shuffle and copy the 4 second-lowest bytes. - PSHUFB X6, X2 - MOVL X2, (DI) - - // offset = XMM(x@3, x@3, x@3, x@3) - MOVOU X1, X7 - SHUFPS $0xff, X1, X7 - - // i += 4 - // dst = dst[4:] - // src = src[4:] - ADDQ $4, R9 - ADDQ $4, DI - ADDQ $16, SI - JMP flAccOpOverLoop4 - -flAccOpOverLoop1: - // for i < len(src) - CMPQ R9, R11 - JAE flAccOpOverEnd - - // x = src[i] + offset - MOVL (SI), X1 - ADDPS X7, X1 - - // y = x & flSignMask - // y = min(y, flOne) - // y = mul(y, flAlmost65536) - MOVOU X3, X2 - ANDPS X1, X2 - MINPS X4, X2 - MULPS X5, X2 - - // z = convertToInt32(y) - LDMXCSR mxcsrNew-4(SP) - CVTPS2PL X2, X2 - LDMXCSR mxcsrOrig-8(SP) - - // Blend over the dst's prior value. - // - // dstA := uint32(dst[0]) * 0x101 - // maskA := z - // outA := dstA*(0xffff-maskA)/0xffff + maskA - // dst[0] = uint8(outA >> 8) - MOVBLZX (DI), R12 - IMULL $0x101, R12 - MOVL X2, R13 - MOVL $0xffff, AX - SUBL R13, AX - MULL R12 // MULL's implicit arg is AX, and the result is stored in DX:AX. - MOVL $0x80008001, BX // Divide by 0xffff is to first multiply by a magic constant... - MULL BX // MULL's implicit arg is AX, and the result is stored in DX:AX. - SHRL $15, DX // ...and then shift by another magic constant (47 - 32 = 15). - ADDL DX, R13 - SHRL $8, R13 - MOVB R13, (DI) - - // offset = x - MOVOU X1, X7 - - // i += 1 - // dst = dst[1:] - // src = src[1:] - ADDQ $1, R9 - ADDQ $1, DI - ADDQ $4, SI - JMP flAccOpOverLoop1 - -flAccOpOverEnd: - RET - -// ---------------------------------------------------------------------------- - -// func floatingAccumulateOpSrcSIMD(dst []uint8, src []float32) -// -// XMM registers. Variable names are per -// https://github.com/google/font-rs/blob/master/src/accumulate.c -// -// xmm0 scratch -// xmm1 x -// xmm2 y, z -// xmm3 flSignMask -// xmm4 flOne -// xmm5 flAlmost65536 -// xmm6 gather -// xmm7 offset -// xmm8 - -// xmm9 - -// xmm10 - -TEXT ·floatingAccumulateOpSrcSIMD(SB), NOSPLIT, $8-48 - - MOVQ dst_base+0(FP), DI - MOVQ dst_len+8(FP), BX - MOVQ src_base+24(FP), SI - MOVQ src_len+32(FP), R10 - - // Sanity check that len(dst) >= len(src). - CMPQ BX, R10 - JLT flAccOpSrcEnd - - // R10 = len(src) &^ 3 - // R11 = len(src) - MOVQ R10, R11 - ANDQ $-4, R10 - - // Prepare to set MXCSR bits 13 and 14, so that the CVTPS2PL below is - // "Round To Zero". - STMXCSR mxcsrOrig-8(SP) - MOVL mxcsrOrig-8(SP), AX - ORL $0x6000, AX - MOVL AX, mxcsrNew-4(SP) - - // flSignMask := XMM(0x7fffffff repeated four times) // All but the sign bit of a float32. - // flOne := XMM(0x3f800000 repeated four times) // 1 as a float32. - // flAlmost65536 := XMM(0x477fffff repeated four times) // 255.99998 * 256 as a float32. - MOVOU flSignMask<>(SB), X3 - MOVOU flOne<>(SB), X4 - MOVOU flAlmost65536<>(SB), X5 - - // gather := XMM(see above) // PSHUFB shuffle mask. - MOVOU gather<>(SB), X6 - - // offset := XMM(0x00000000 repeated four times) // Cumulative sum. - XORPS X7, X7 - - // i := 0 - MOVQ $0, R9 - -flAccOpSrcLoop4: - // for i < (len(src) &^ 3) - CMPQ R9, R10 - JAE flAccOpSrcLoop1 - - // x = XMM(s0, s1, s2, s3) - // - // Where s0 is src[i+0], s1 is src[i+1], etc. - MOVOU (SI), X1 - - // scratch = XMM(0, s0, s1, s2) - // x += scratch // yields x == XMM(s0, s0+s1, s1+s2, s2+s3) - MOVOU X1, X0 - PSLLO $4, X0 - ADDPS X0, X1 - - // scratch = XMM(0, 0, 0, 0) - // scratch = XMM(scratch@0, scratch@0, x@0, x@1) // yields scratch == XMM(0, 0, s0, s0+s1) - // x += scratch // yields x == XMM(s0, s0+s1, s0+s1+s2, s0+s1+s2+s3) - XORPS X0, X0 - SHUFPS $0x40, X1, X0 - ADDPS X0, X1 - - // x += offset - ADDPS X7, X1 - - // y = x & flSignMask - // y = min(y, flOne) - // y = mul(y, flAlmost65536) - MOVOU X3, X2 - ANDPS X1, X2 - MINPS X4, X2 - MULPS X5, X2 - - // z = convertToInt32(y) - LDMXCSR mxcsrNew-4(SP) - CVTPS2PL X2, X2 - LDMXCSR mxcsrOrig-8(SP) - - // z = shuffleTheSecondLowestBytesOfEach4ByteElement(z) - // copy(dst[:4], low4BytesOf(z)) - PSHUFB X6, X2 - MOVL X2, (DI) - - // offset = XMM(x@3, x@3, x@3, x@3) - MOVOU X1, X7 - SHUFPS $0xff, X1, X7 - - // i += 4 - // dst = dst[4:] - // src = src[4:] - ADDQ $4, R9 - ADDQ $4, DI - ADDQ $16, SI - JMP flAccOpSrcLoop4 - -flAccOpSrcLoop1: - // for i < len(src) - CMPQ R9, R11 - JAE flAccOpSrcEnd - - // x = src[i] + offset - MOVL (SI), X1 - ADDPS X7, X1 - - // y = x & flSignMask - // y = min(y, flOne) - // y = mul(y, flAlmost65536) - MOVOU X3, X2 - ANDPS X1, X2 - MINPS X4, X2 - MULPS X5, X2 - - // z = convertToInt32(y) - LDMXCSR mxcsrNew-4(SP) - CVTPS2PL X2, X2 - LDMXCSR mxcsrOrig-8(SP) - - // dst[0] = uint8(z>>8) - MOVL X2, BX - SHRL $8, BX - MOVB BX, (DI) - - // offset = x - MOVOU X1, X7 - - // i += 1 - // dst = dst[1:] - // src = src[1:] - ADDQ $1, R9 - ADDQ $1, DI - ADDQ $4, SI - JMP flAccOpSrcLoop1 - -flAccOpSrcEnd: - RET - -// ---------------------------------------------------------------------------- - -// func floatingAccumulateMaskSIMD(dst []uint32, src []float32) -// -// XMM registers. Variable names are per -// https://github.com/google/font-rs/blob/master/src/accumulate.c -// -// xmm0 scratch -// xmm1 x -// xmm2 y, z -// xmm3 flSignMask -// xmm4 flOne -// xmm5 flAlmost65536 -// xmm6 - -// xmm7 offset -// xmm8 - -// xmm9 - -// xmm10 - -TEXT ·floatingAccumulateMaskSIMD(SB), NOSPLIT, $8-48 - - MOVQ dst_base+0(FP), DI - MOVQ dst_len+8(FP), BX - MOVQ src_base+24(FP), SI - MOVQ src_len+32(FP), R10 - - // Sanity check that len(dst) >= len(src). - CMPQ BX, R10 - JLT flAccMaskEnd - - // R10 = len(src) &^ 3 - // R11 = len(src) - MOVQ R10, R11 - ANDQ $-4, R10 - - // Prepare to set MXCSR bits 13 and 14, so that the CVTPS2PL below is - // "Round To Zero". - STMXCSR mxcsrOrig-8(SP) - MOVL mxcsrOrig-8(SP), AX - ORL $0x6000, AX - MOVL AX, mxcsrNew-4(SP) - - // flSignMask := XMM(0x7fffffff repeated four times) // All but the sign bit of a float32. - // flOne := XMM(0x3f800000 repeated four times) // 1 as a float32. - // flAlmost65536 := XMM(0x477fffff repeated four times) // 255.99998 * 256 as a float32. - MOVOU flSignMask<>(SB), X3 - MOVOU flOne<>(SB), X4 - MOVOU flAlmost65536<>(SB), X5 - - // offset := XMM(0x00000000 repeated four times) // Cumulative sum. - XORPS X7, X7 - - // i := 0 - MOVQ $0, R9 - -flAccMaskLoop4: - // for i < (len(src) &^ 3) - CMPQ R9, R10 - JAE flAccMaskLoop1 - - // x = XMM(s0, s1, s2, s3) - // - // Where s0 is src[i+0], s1 is src[i+1], etc. - MOVOU (SI), X1 - - // scratch = XMM(0, s0, s1, s2) - // x += scratch // yields x == XMM(s0, s0+s1, s1+s2, s2+s3) - MOVOU X1, X0 - PSLLO $4, X0 - ADDPS X0, X1 - - // scratch = XMM(0, 0, 0, 0) - // scratch = XMM(scratch@0, scratch@0, x@0, x@1) // yields scratch == XMM(0, 0, s0, s0+s1) - // x += scratch // yields x == XMM(s0, s0+s1, s0+s1+s2, s0+s1+s2+s3) - XORPS X0, X0 - SHUFPS $0x40, X1, X0 - ADDPS X0, X1 - - // x += offset - ADDPS X7, X1 - - // y = x & flSignMask - // y = min(y, flOne) - // y = mul(y, flAlmost65536) - MOVOU X3, X2 - ANDPS X1, X2 - MINPS X4, X2 - MULPS X5, X2 - - // z = convertToInt32(y) - LDMXCSR mxcsrNew-4(SP) - CVTPS2PL X2, X2 - LDMXCSR mxcsrOrig-8(SP) - - // copy(dst[:4], z) - MOVOU X2, (DI) - - // offset = XMM(x@3, x@3, x@3, x@3) - MOVOU X1, X7 - SHUFPS $0xff, X1, X7 - - // i += 4 - // dst = dst[4:] - // src = src[4:] - ADDQ $4, R9 - ADDQ $16, DI - ADDQ $16, SI - JMP flAccMaskLoop4 - -flAccMaskLoop1: - // for i < len(src) - CMPQ R9, R11 - JAE flAccMaskEnd - - // x = src[i] + offset - MOVL (SI), X1 - ADDPS X7, X1 - - // y = x & flSignMask - // y = min(y, flOne) - // y = mul(y, flAlmost65536) - MOVOU X3, X2 - ANDPS X1, X2 - MINPS X4, X2 - MULPS X5, X2 - - // z = convertToInt32(y) - LDMXCSR mxcsrNew-4(SP) - CVTPS2PL X2, X2 - LDMXCSR mxcsrOrig-8(SP) - - // dst[0] = uint32(z) - MOVL X2, (DI) - - // offset = x - MOVOU X1, X7 - - // i += 1 - // dst = dst[1:] - // src = src[1:] - ADDQ $1, R9 - ADDQ $4, DI - ADDQ $4, SI - JMP flAccMaskLoop1 - -flAccMaskEnd: - RET |