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aes_arm64.s
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aes_arm64.s
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build gc && !purego
#include "textflag.h"
DATA rotInvSRows<>+0x00(SB)/8, $0x080f0205040b0e01
DATA rotInvSRows<>+0x08(SB)/8, $0x00070a0d0c030609
GLOBL rotInvSRows<>(SB), (NOPTR+RODATA), $16
DATA invSRows<>+0x00(SB)/8, $0x0b0e0104070a0d00
DATA invSRows<>+0x08(SB)/8, $0x0306090c0f020508
GLOBL invSRows<>(SB), (NOPTR+RODATA), $16
// func encryptBlockAsm(nr int, xk *uint32, dst, src *byte)
TEXT ·encryptBlockAsm(SB), NOSPLIT, $0
MOVD nr+0(FP), R9
MOVD xk+8(FP), R10
MOVD dst+16(FP), R11
MOVD src+24(FP), R12
VLD1 (R12), [V0.B16]
CMP $12, R9
BLT enc128
BEQ enc196
enc256:
VLD1.P 32(R10), [V1.B16, V2.B16]
AESE V1.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V2.B16, V0.B16
AESMC V0.B16, V0.B16
enc196:
VLD1.P 32(R10), [V3.B16, V4.B16]
AESE V3.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V4.B16, V0.B16
AESMC V0.B16, V0.B16
enc128:
VLD1.P 64(R10), [V5.B16, V6.B16, V7.B16, V8.B16]
VLD1.P 64(R10), [V9.B16, V10.B16, V11.B16, V12.B16]
VLD1.P 48(R10), [V13.B16, V14.B16, V15.B16]
AESE V5.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V6.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V7.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V8.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V9.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V10.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V11.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V12.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V13.B16, V0.B16
AESMC V0.B16, V0.B16
AESE V14.B16, V0.B16
VEOR V0.B16, V15.B16, V0.B16
VST1 [V0.B16], (R11)
RET
// func expandKeyAsm(nr int, key *byte, enc *uint32)
// Note that round keys are stored in uint128 format, not uint32
TEXT ·expandKeyAsm(SB), NOSPLIT, $0
MOVD nr+0(FP), R8
MOVD key+8(FP), R9
MOVD enc+16(FP), R10
LDP rotInvSRows<>(SB), (R0, R1)
VMOV R0, V3.D[0]
VMOV R1, V3.D[1]
VEOR V0.B16, V0.B16, V0.B16 // All zeroes
MOVW $1, R13
TBZ $1, R8, ks192
TBNZ $2, R8, ks256
LDPW (R9), (R4, R5)
LDPW 8(R9), (R6, R7)
STPW.P (R4, R5), 8(R10)
STPW.P (R6, R7), 8(R10)
MOVW $0x1b, R14
ks128Loop:
VMOV R7, V2.S[0]
VTBL V3.B16, [V2.B16], V2.B16
AESE V0.B16, V2.B16 // Use AES to compute the SBOX
EORW R13, R4
LSLW $1, R13 // Compute next Rcon
ANDSW $0x100, R13, ZR
CSELW NE, R14, R13, R13 // Fake modulo
SUBS $1, R8
VMOV V2.S[0], R0
EORW R0, R4
EORW R4, R5
EORW R5, R6
EORW R6, R7
STPW.P (R4, R5), 8(R10)
STPW.P (R6, R7), 8(R10)
BNE ks128Loop
B ksDone
ks192:
LDPW (R9), (R2, R3)
LDPW 8(R9), (R4, R5)
LDPW 16(R9), (R6, R7)
STPW.P (R2, R3), 8(R10)
STPW.P (R4, R5), 8(R10)
SUB $4, R8
ks192Loop:
STPW.P (R6, R7), 8(R10)
VMOV R7, V2.S[0]
VTBL V3.B16, [V2.B16], V2.B16
AESE V0.B16, V2.B16
EORW R13, R2
LSLW $1, R13
SUBS $1, R8
VMOV V2.S[0], R0
EORW R0, R2
EORW R2, R3
EORW R3, R4
EORW R4, R5
EORW R5, R6
EORW R6, R7
STPW.P (R2, R3), 8(R10)
STPW.P (R4, R5), 8(R10)
BNE ks192Loop
B ksDone
ks256:
LDP invSRows<>(SB), (R0, R1)
VMOV R0, V4.D[0]
VMOV R1, V4.D[1]
LDPW (R9), (R0, R1)
LDPW 8(R9), (R2, R3)
LDPW 16(R9), (R4, R5)
LDPW 24(R9), (R6, R7)
STPW.P (R0, R1), 8(R10)
STPW.P (R2, R3), 8(R10)
SUB $7, R8
ks256Loop:
STPW.P (R4, R5), 8(R10)
STPW.P (R6, R7), 8(R10)
VMOV R7, V2.S[0]
VTBL V3.B16, [V2.B16], V2.B16
AESE V0.B16, V2.B16
EORW R13, R0
LSLW $1, R13
SUBS $1, R8
VMOV V2.S[0], R9
EORW R9, R0
EORW R0, R1
EORW R1, R2
EORW R2, R3
VMOV R3, V2.S[0]
VTBL V4.B16, [V2.B16], V2.B16
AESE V0.B16, V2.B16
VMOV V2.S[0], R9
EORW R9, R4
EORW R4, R5
EORW R5, R6
EORW R6, R7
STPW.P (R0, R1), 8(R10)
STPW.P (R2, R3), 8(R10)
BNE ks256Loop
ksDone:
RET