tzhash/tz/tzbits_amd64.s
Evgeniy Kulikov 5cf44c62ac
Initial
2018-12-29 16:04:17 +03:00

62 lines
1.1 KiB
ArmAsm

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