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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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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 res+0(FP), res_ptr
EOR x0, x0, x0
EOR x1, x1, x1
EOR x2, x2, x2
EOR x3, x3, x3
EOR y0, y0, y0
EOR y1, y1, y1
EOR y2, y2, y2
EOR y3, y3, y3
EOR t0, t0, t0
EOR t1, t1, t1
EOR t2, t2, t2
EOR t3, t3, t3
VMOV const0, V0.S4 // will use VDUP after upgrade go to 1.17+
VEOR V2.B16, V2.B16, V2.B16
VEOR V3.B16, V3.B16, V3.B16
VEOR V4.B16, V4.B16, V4.B16
VEOR V5.B16, V5.B16, V5.B16
VEOR V6.B16, V6.B16, V6.B16
VEOR V7.B16, V7.B16, V7.B16
MOVD $0, const1
loop_select:
ADD $1, const1
CMP const0, const1
LDP.P 16(b_ptr), (acc0, acc1)
CSEL EQ, acc0, x0, x0
CSEL EQ, acc1, x1, x1
LDP.P 16(b_ptr), (acc2, acc3)
CSEL EQ, acc2, x2, x2
CSEL EQ, acc3, x3, x3
LDP.P 16(b_ptr), (acc4, acc5)
CSEL EQ, acc4, y0, y0
CSEL EQ, acc5, y1, y1
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
VMOV const1, V1.S4 // will use VDUP after upgrade go to 1.17+
VCMEQ V0.S4, V1.S4, V14.S4
VLD1.P (48)(b_ptr), [V8.B16, V9.B16, V10.B16]
VLD1.P (48)(b_ptr), [V11.B16, V12.B16, V13.B16]
VBIT V14.B16, V8.B16, V2.B16
VBIT V14.B16, V9.B16, V3.B16
VBIT V14.B16, V10.B16, V4.B16
VBIT V14.B16, V11.B16, V5.B16
VBIT V14.B16, V12.B16, V6.B16
VBIT V14.B16, V13.B16, V7.B16
CMP a_ptr, const1
BNE loop_select
STP (x0, x1), 0*16(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)
VST1.P [V2.B16, V3.B16, V4.B16], (48)(res_ptr)
VST1 [V5.B16, V6.B16, V7.B16], (res_ptr)
RET
/* ---------------------------------------*/
// func p256SelectAffine(res *p256AffinePoint, table *p256AffineTable, idx int)