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internal/sm2ec: uses neon inst. for p256SelectAffine

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Sun Yimin 2023-11-07 16:11:05 +08:00 committed by GitHub
parent ef55df3657
commit b5c593005d
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1 changed files with 14 additions and 25 deletions
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39
internal/sm2ec/p256_asm_arm64.s
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@ -333,40 +333,29 @@ TEXT ·p256SelectAffine(SB),NOSPLIT,$0
MOVD table+8(FP), t1
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
VMOV t0, 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
MOVD $0, t2
loop_select:
ADD $1, t2
CMP t0, t2
LDP.P 16(t1), (acc0, acc1)
CSEL EQ, acc0, x0, x0
CSEL EQ, acc1, x1, x1
LDP.P 16(t1), (acc2, acc3)
CSEL EQ, acc2, x2, x2
CSEL EQ, acc3, x3, x3
LDP.P 16(t1), (acc4, acc5)
CSEL EQ, acc4, y0, y0
CSEL EQ, acc5, y1, y1
LDP.P 16(t1), (acc6, acc7)
CSEL EQ, acc6, y2, y2
CSEL EQ, acc7, y3, y3
VMOV t2, V1.S4 // will use VDUP after upgrade go to 1.17+
VCMEQ V0.S4, V1.S4, V10.S4
VLD1.P (64)(t1), [V6.B16, V7.B16, V8.B16, V9.B16]
VBIT V10.B16, V6.B16, V2.B16
VBIT V10.B16, V7.B16, V3.B16
VBIT V10.B16, V8.B16, V4.B16
VBIT V10.B16, V9.B16, V5.B16
CMP $32, t2
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)
VST1 [V2.B16, V3.B16, V4.B16, V5.B16], (res_ptr)
RET
/* ---------------------------------------*/