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internal/sm2ec: use neon inst. for p256Select

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Sun Yimin 2023-11-07 16:34:58 +08:00 committed by GitHub
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commit 2f60f0062b
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1 changed files with 20 additions and 38 deletions
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58
internal/sm2ec/p256_asm_arm64.s
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@ -279,52 +279,34 @@ TEXT ·p256Select(SB),NOSPLIT,$0
MOVD table+8(FP), b_ptr MOVD table+8(FP), b_ptr
MOVD res+0(FP), res_ptr MOVD res+0(FP), res_ptr
EOR x0, x0, x0 VMOV const0, V0.S4 // will use VDUP after upgrade go to 1.17+
EOR x1, x1, x1
EOR x2, x2, x2 VEOR V2.B16, V2.B16, V2.B16
EOR x3, x3, x3 VEOR V3.B16, V3.B16, V3.B16
EOR y0, y0, y0 VEOR V4.B16, V4.B16, V4.B16
EOR y1, y1, y1 VEOR V5.B16, V5.B16, V5.B16
EOR y2, y2, y2 VEOR V6.B16, V6.B16, V6.B16
EOR y3, y3, y3 VEOR V7.B16, V7.B16, V7.B16
EOR t0, t0, t0
EOR t1, t1, t1
EOR t2, t2, t2
EOR t3, t3, t3
MOVD $0, const1 MOVD $0, const1
loop_select: loop_select:
ADD $1, const1 ADD $1, const1
CMP const0, const1 VMOV const1, V1.S4 // will use VDUP after upgrade go to 1.17+
LDP.P 16(b_ptr), (acc0, acc1) VCMEQ V0.S4, V1.S4, V14.S4
CSEL EQ, acc0, x0, x0 VLD1.P (48)(b_ptr), [V8.B16, V9.B16, V10.B16]
CSEL EQ, acc1, x1, x1 VLD1.P (48)(b_ptr), [V11.B16, V12.B16, V13.B16]
LDP.P 16(b_ptr), (acc2, acc3) VBIT V14.B16, V8.B16, V2.B16
CSEL EQ, acc2, x2, x2 VBIT V14.B16, V9.B16, V3.B16
CSEL EQ, acc3, x3, x3 VBIT V14.B16, V10.B16, V4.B16
LDP.P 16(b_ptr), (acc4, acc5) VBIT V14.B16, V11.B16, V5.B16
CSEL EQ, acc4, y0, y0 VBIT V14.B16, V12.B16, V6.B16
CSEL EQ, acc5, y1, y1 VBIT V14.B16, V13.B16, V7.B16
LDP.P 16(b_ptr), (acc6, acc7)
CSEL EQ, acc6, y2, y2
CSEL EQ, acc7, y3, y3
LDP.P 16(b_ptr), (acc0, acc1)
CSEL EQ, acc0, t0, t0
CSEL EQ, acc1, t1, t1
LDP.P 16(b_ptr), (acc2, acc3)
CSEL EQ, acc2, t2, t2
CSEL EQ, acc3, t3, t3
CMP a_ptr, const1 CMP a_ptr, const1
BNE loop_select BNE loop_select
VST1.P [V2.B16, V3.B16, V4.B16], (48)(res_ptr)
STP (x0, x1), 0*16(res_ptr) VST1 [V5.B16, V6.B16, V7.B16], (res_ptr)
STP (x2, x3), 1*16(res_ptr)
STP (y0, y1), 2*16(res_ptr)
STP (y2, y3), 3*16(res_ptr)
STP (t0, t1), 4*16(res_ptr)
STP (t2, t3), 5*16(res_ptr)
RET RET
/* ---------------------------------------*/ /* ---------------------------------------*/
// func p256SelectAffine(res *p256AffinePoint, table *p256AffineTable, idx int) // func p256SelectAffine(res *p256AffinePoint, table *p256AffineTable, idx int)