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sm4: gcm init use PALIGNR to reduce instructions

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emmansun 2023-07-03 15:41:05 +08:00
parent d3e6412258
commit f10b09f5a2
1 changed files with 8 additions and 10 deletions
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18
sm4/gcm_amd64.s
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@ -297,21 +297,19 @@ TEXT ·gcmSm4Init(SB),NOSPLIT,$0
XORL CX, CX
sm4InitEncLoop:
SM4_SINGLE_ROUND(0, RK, CX, T0, T1, T2, B0, B1, B2, B3)
SM4_SINGLE_ROUND(1, RK, CX, T0, T1, T2, B1, B2, B3, B0)
SM4_SINGLE_ROUND(2, RK, CX, T0, T1, T2, B2, B3, B0, B1)
SM4_SINGLE_ROUND(3, RK, CX, T0, T1, T2, B3, B0, B1, B2)
SM4_SINGLE_ROUND(0, RK, CX, T0, T1, T2, B3, B2, B1, B0)
SM4_SINGLE_ROUND(1, RK, CX, T0, T1, T2, B2, B1, B0, B3)
SM4_SINGLE_ROUND(2, RK, CX, T0, T1, T2, B1, B0, B3, B2)
SM4_SINGLE_ROUND(3, RK, CX, T0, T1, T2, B0, B3, B2, B1)
ADDL $16, CX
CMPL CX, $4*32
JB sm4InitEncLoop
PEXTRD $0, B1, R8
PINSRD $1, R8, B0
PEXTRD $0, B2, R8
PINSRD $2, R8, B0
PEXTRD $0, B3, R8
PINSRD $3, R8, B0
PALIGNR $4, B3, B3
PALIGNR $4, B3, B2
PALIGNR $4, B2, B1
PALIGNR $4, B1, B0
// H * 2
PSHUFD $0xff, B0, T0