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internal/sm2ec: s390x, try to use VLM/VSTM #235

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Sun Yimin 2024-08-29 08:33:35 +08:00 committed by GitHub
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commit f0b36b70ce
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1 changed files with 10 additions and 10 deletions
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20
internal/sm2ec/p256_asm_s390x.s
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@ -55,20 +55,20 @@ TEXT ·p256LittleToBig(SB), NOSPLIT, $0
// func p256BigToLittle(res *p256Element, in *[32]byte)
#define res_ptr R1
#define in_ptr R2
#define T1L V2
#define T1H V3
#define T1L V3
#define T1H V2
#define T1L2 V1
TEXT ·p256BigToLittle(SB), NOSPLIT, $0
MOVD res+0(FP), res_ptr
MOVD in+8(FP), in_ptr
VL 0(in_ptr), T1H
VL 16(in_ptr), T1L
VLM (in_ptr), T1H, T1L
VPDI $0x4, T1L, T1L, T1L
VPDI $0x4, T1L, T1L, T1L2
VPDI $0x4, T1H, T1H, T1H
VSTM T1L, T1H, (res_ptr)
VSTM T1L2, T1H, (res_ptr)
RET
@ -76,6 +76,7 @@ TEXT ·p256BigToLittle(SB), NOSPLIT, $0
#undef in_ptr
#undef T1L
#undef T1H
#undef T1L2
// ---------------------------------------
// iff cond == 1 val <- -val
@ -100,9 +101,8 @@ TEXT ·p256NegCond(SB), NOSPLIT, $0
MOVD $p256mul<>+0x00(SB), CPOOL
VLM (CPOOL), PH, PL
VL 16(P1ptr), Y1H
VLM (P1ptr), Y1L, Y1H
VPDI $0x4, Y1H, Y1H, Y1H
VL 0(P1ptr), Y1L
VPDI $0x4, Y1L, Y1L, Y1L
VLREPG cond+8(FP), SEL1
@ -117,9 +117,9 @@ TEXT ·p256NegCond(SB), NOSPLIT, $0
VSEL Y1H, T1H, SEL1, Y1H
VPDI $0x4, Y1H, Y1H, Y1H
VST Y1H, 16(P1ptr)
VPDI $0x4, Y1L, Y1L, Y1L
VST Y1L, 0(P1ptr)
VSTM Y1L, Y1H, (P1ptr)
RET
#undef P1ptr