46 lines
921 B
ArmAsm
46 lines
921 B
ArmAsm
#include "textflag.h"
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#define mask(bit, src, tmp, to1, to2) \
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MOVQ src, tmp \
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SHRQ bit, tmp \
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ANDQ $1, tmp \
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NEGQ tmp \
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MOVQ tmp, to1 \
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VPBROADCASTB to1, to2
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#define mulBit(bit) \
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VPSLLQ $1, Y0, Y1 \
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VPALIGNR $8, Y1, Y0, Y2 \
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VPSRLQ $63, Y2, Y2 \
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VPXOR Y1, Y2, Y2 \
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VPSRLQ $63, Y1, Y3 \
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VPSLLQ $63, Y3, Y3 \
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VPUNPCKHQDQ Y3, Y3, Y3 \
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VPXOR Y2, Y3, Y3 \
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mask(bit, CX, DX, X1, Y2) \
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VPXOR Y3, Y8, Y3 \
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VPAND Y3, Y2, Y4 \
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VPXOR Y4, Y0, Y8 \
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VMOVDQA Y3, Y0
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// func mulByteRightx2(c00c10, c01c11 *[4]uint64, b byte)
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TEXT ·mulByteRightx2(SB),NOSPLIT,$0
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MOVQ c00c10+0(FP), AX
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VMOVDQA (AX), Y0
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MOVQ c01c11+8(FP), BX
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VMOVDQA (BX), Y8
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MOVB b+16(FP), CX
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mulBit($7)
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mulBit($6)
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mulBit($5)
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mulBit($4)
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mulBit($3)
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mulBit($2)
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mulBit($1)
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mulBit($0)
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VMOVDQA Y8, (BX)
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VMOVDQA Y0, (AX)
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RET
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