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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
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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 table+8(FP), t1
MOVD res+0(FP), res_ptr MOVD res+0(FP), res_ptr
EOR x0, x0, x0 VMOV t0, 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
EOR y3, y3, y3
MOVD $0, t2 MOVD $0, t2
loop_select: loop_select:
ADD $1, t2 ADD $1, t2
CMP t0, t2 VMOV t2, V1.S4 // will use VDUP after upgrade go to 1.17+
LDP.P 16(t1), (acc0, acc1) VCMEQ V0.S4, V1.S4, V10.S4
CSEL EQ, acc0, x0, x0 VLD1.P (64)(t1), [V6.B16, V7.B16, V8.B16, V9.B16]
CSEL EQ, acc1, x1, x1 VBIT V10.B16, V6.B16, V2.B16
LDP.P 16(t1), (acc2, acc3) VBIT V10.B16, V7.B16, V3.B16
CSEL EQ, acc2, x2, x2 VBIT V10.B16, V8.B16, V4.B16
CSEL EQ, acc3, x3, x3 VBIT V10.B16, V9.B16, V5.B16
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
CMP $32, t2 CMP $32, t2
BNE loop_select BNE loop_select
STP (x0, x1), 0*16(res_ptr) VST1 [V2.B16, V3.B16, V4.B16, V5.B16], (res_ptr)
STP (x2, x3), 1*16(res_ptr)
STP (y0, y1), 2*16(res_ptr)
STP (y2, y3), 3*16(res_ptr)
RET RET
/* ---------------------------------------*/ /* ---------------------------------------*/