62 lines
1.2 KiB
ArmAsm
62 lines
1.2 KiB
ArmAsm
#include "textflag.h"
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// func mulBitRight(c00, c01, c10, c11, e *[2]uint64)
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TEXT ·mulBitRight(SB),NOSPLIT,$0
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MOVQ c00+0(FP), AX
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MOVUPD (AX), X0
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MOVUPD X0, X8 // remember c00 value
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MOVQ c01+8(FP), BX
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MOVUPD (BX), X1
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MOVQ c10+16(FP), CX
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MOVUPD (CX), X2
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MOVUPD X2, X9 // remember c10 value
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MOVQ c11+24(FP), DX
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MOVUPD (DX), X3
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// c00 *= 2
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VPSLLQ $1, X0, X5
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VPALIGNR $8, X5, X0, X6
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PSRLQ $63, X6
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MOVUPD ·x127x63(SB), X7
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ANDPD X5, X7
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VPUNPCKHQDQ X7, X7, X7
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XORPD X6, X5
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XORPD X7, X5
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MOVUPD X5, X0
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// c00 += c01
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XORPD X1, X0
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MOVUPD X0, (AX)
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// c10 *= 2
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VPSLLQ $1, X2, X5
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VPALIGNR $8, X5, X2, X6
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PSRLQ $63, X6
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MOVUPD ·x127x63(SB), X7
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ANDPD X5, X7
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VPUNPCKHQDQ X7, X7, X7
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XORPD X6, X5
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XORPD X7, X5
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MOVUPD X5, X2
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// c10 += c11
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XORPD X3, X2
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MOVUPD X2, (CX)
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MOVQ e+32(FP), AX
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MOVUPD (AX), X5
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// c01 = c00 + e
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VANDPD X0, X5, X1
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// c01 += X8 (old c00)
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XORPD X8, X1
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MOVUPD X1, (BX)
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// c11 = c10 + e
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VANDPD X2, X5, X3
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// c11 += X9 (old c10)
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XORPD X9, X3
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MOVUPD X3, (DX)
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RET
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