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| /* SPDX-License-Identifier: GPL-2.0-only */
| /*
| * linux/arch/arm64/crypto/aes-modes.S - chaining mode wrappers for AES
| *
| * Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
| */
|
| /* included by aes-ce.S and aes-neon.S */
|
| .text
| .align 4
|
| #ifndef MAX_STRIDE
| #define MAX_STRIDE 4
| #endif
|
| #if MAX_STRIDE == 4
| #define ST4(x...) x
| #define ST5(x...)
| #else
| #define ST4(x...)
| #define ST5(x...) x
| #endif
|
| SYM_FUNC_START_LOCAL(aes_encrypt_block4x)
| encrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7
| ret
| SYM_FUNC_END(aes_encrypt_block4x)
|
| SYM_FUNC_START_LOCAL(aes_decrypt_block4x)
| decrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7
| ret
| SYM_FUNC_END(aes_decrypt_block4x)
|
| #if MAX_STRIDE == 5
| SYM_FUNC_START_LOCAL(aes_encrypt_block5x)
| encrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7
| ret
| SYM_FUNC_END(aes_encrypt_block5x)
|
| SYM_FUNC_START_LOCAL(aes_decrypt_block5x)
| decrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7
| ret
| SYM_FUNC_END(aes_decrypt_block5x)
| #endif
|
| /*
| * aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks)
| * aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks)
| */
|
| AES_FUNC_START(aes_ecb_encrypt)
| stp x29, x30, [sp, #-16]!
| mov x29, sp
|
| enc_prepare w3, x2, x5
|
| .LecbencloopNx:
| subs w4, w4, #MAX_STRIDE
| bmi .Lecbenc1x
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
| ST4( bl aes_encrypt_block4x )
| ST5( ld1 {v4.16b}, [x1], #16 )
| ST5( bl aes_encrypt_block5x )
| st1 {v0.16b-v3.16b}, [x0], #64
| ST5( st1 {v4.16b}, [x0], #16 )
| b .LecbencloopNx
| .Lecbenc1x:
| adds w4, w4, #MAX_STRIDE
| beq .Lecbencout
| .Lecbencloop:
| ld1 {v0.16b}, [x1], #16 /* get next pt block */
| encrypt_block v0, w3, x2, x5, w6
| st1 {v0.16b}, [x0], #16
| subs w4, w4, #1
| bne .Lecbencloop
| .Lecbencout:
| ldp x29, x30, [sp], #16
| ret
| AES_FUNC_END(aes_ecb_encrypt)
|
|
| AES_FUNC_START(aes_ecb_decrypt)
| stp x29, x30, [sp, #-16]!
| mov x29, sp
|
| dec_prepare w3, x2, x5
|
| .LecbdecloopNx:
| subs w4, w4, #MAX_STRIDE
| bmi .Lecbdec1x
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
| ST4( bl aes_decrypt_block4x )
| ST5( ld1 {v4.16b}, [x1], #16 )
| ST5( bl aes_decrypt_block5x )
| st1 {v0.16b-v3.16b}, [x0], #64
| ST5( st1 {v4.16b}, [x0], #16 )
| b .LecbdecloopNx
| .Lecbdec1x:
| adds w4, w4, #MAX_STRIDE
| beq .Lecbdecout
| .Lecbdecloop:
| ld1 {v0.16b}, [x1], #16 /* get next ct block */
| decrypt_block v0, w3, x2, x5, w6
| st1 {v0.16b}, [x0], #16
| subs w4, w4, #1
| bne .Lecbdecloop
| .Lecbdecout:
| ldp x29, x30, [sp], #16
| ret
| AES_FUNC_END(aes_ecb_decrypt)
|
|
| /*
| * aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks, u8 iv[])
| * aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks, u8 iv[])
| * aes_essiv_cbc_encrypt(u8 out[], u8 const in[], u32 const rk1[],
| * int rounds, int blocks, u8 iv[],
| * u32 const rk2[]);
| * aes_essiv_cbc_decrypt(u8 out[], u8 const in[], u32 const rk1[],
| * int rounds, int blocks, u8 iv[],
| * u32 const rk2[]);
| */
|
| AES_FUNC_START(aes_essiv_cbc_encrypt)
| ld1 {v4.16b}, [x5] /* get iv */
|
| mov w8, #14 /* AES-256: 14 rounds */
| enc_prepare w8, x6, x7
| encrypt_block v4, w8, x6, x7, w9
| enc_switch_key w3, x2, x6
| b .Lcbcencloop4x
|
| AES_FUNC_START(aes_cbc_encrypt)
| ld1 {v4.16b}, [x5] /* get iv */
| enc_prepare w3, x2, x6
|
| .Lcbcencloop4x:
| subs w4, w4, #4
| bmi .Lcbcenc1x
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
| eor v0.16b, v0.16b, v4.16b /* ..and xor with iv */
| encrypt_block v0, w3, x2, x6, w7
| eor v1.16b, v1.16b, v0.16b
| encrypt_block v1, w3, x2, x6, w7
| eor v2.16b, v2.16b, v1.16b
| encrypt_block v2, w3, x2, x6, w7
| eor v3.16b, v3.16b, v2.16b
| encrypt_block v3, w3, x2, x6, w7
| st1 {v0.16b-v3.16b}, [x0], #64
| mov v4.16b, v3.16b
| b .Lcbcencloop4x
| .Lcbcenc1x:
| adds w4, w4, #4
| beq .Lcbcencout
| .Lcbcencloop:
| ld1 {v0.16b}, [x1], #16 /* get next pt block */
| eor v4.16b, v4.16b, v0.16b /* ..and xor with iv */
| encrypt_block v4, w3, x2, x6, w7
| st1 {v4.16b}, [x0], #16
| subs w4, w4, #1
| bne .Lcbcencloop
| .Lcbcencout:
| st1 {v4.16b}, [x5] /* return iv */
| ret
| AES_FUNC_END(aes_cbc_encrypt)
| AES_FUNC_END(aes_essiv_cbc_encrypt)
|
| AES_FUNC_START(aes_essiv_cbc_decrypt)
| stp x29, x30, [sp, #-16]!
| mov x29, sp
|
| ld1 {cbciv.16b}, [x5] /* get iv */
|
| mov w8, #14 /* AES-256: 14 rounds */
| enc_prepare w8, x6, x7
| encrypt_block cbciv, w8, x6, x7, w9
| b .Lessivcbcdecstart
|
| AES_FUNC_START(aes_cbc_decrypt)
| stp x29, x30, [sp, #-16]!
| mov x29, sp
|
| ld1 {cbciv.16b}, [x5] /* get iv */
| .Lessivcbcdecstart:
| dec_prepare w3, x2, x6
|
| .LcbcdecloopNx:
| subs w4, w4, #MAX_STRIDE
| bmi .Lcbcdec1x
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
| #if MAX_STRIDE == 5
| ld1 {v4.16b}, [x1], #16 /* get 1 ct block */
| mov v5.16b, v0.16b
| mov v6.16b, v1.16b
| mov v7.16b, v2.16b
| bl aes_decrypt_block5x
| sub x1, x1, #32
| eor v0.16b, v0.16b, cbciv.16b
| eor v1.16b, v1.16b, v5.16b
| ld1 {v5.16b}, [x1], #16 /* reload 1 ct block */
| ld1 {cbciv.16b}, [x1], #16 /* reload 1 ct block */
| eor v2.16b, v2.16b, v6.16b
| eor v3.16b, v3.16b, v7.16b
| eor v4.16b, v4.16b, v5.16b
| #else
| mov v4.16b, v0.16b
| mov v5.16b, v1.16b
| mov v6.16b, v2.16b
| bl aes_decrypt_block4x
| sub x1, x1, #16
| eor v0.16b, v0.16b, cbciv.16b
| eor v1.16b, v1.16b, v4.16b
| ld1 {cbciv.16b}, [x1], #16 /* reload 1 ct block */
| eor v2.16b, v2.16b, v5.16b
| eor v3.16b, v3.16b, v6.16b
| #endif
| st1 {v0.16b-v3.16b}, [x0], #64
| ST5( st1 {v4.16b}, [x0], #16 )
| b .LcbcdecloopNx
| .Lcbcdec1x:
| adds w4, w4, #MAX_STRIDE
| beq .Lcbcdecout
| .Lcbcdecloop:
| ld1 {v1.16b}, [x1], #16 /* get next ct block */
| mov v0.16b, v1.16b /* ...and copy to v0 */
| decrypt_block v0, w3, x2, x6, w7
| eor v0.16b, v0.16b, cbciv.16b /* xor with iv => pt */
| mov cbciv.16b, v1.16b /* ct is next iv */
| st1 {v0.16b}, [x0], #16
| subs w4, w4, #1
| bne .Lcbcdecloop
| .Lcbcdecout:
| st1 {cbciv.16b}, [x5] /* return iv */
| ldp x29, x30, [sp], #16
| ret
| AES_FUNC_END(aes_cbc_decrypt)
| AES_FUNC_END(aes_essiv_cbc_decrypt)
|
|
| /*
| * aes_cbc_cts_encrypt(u8 out[], u8 const in[], u32 const rk[],
| * int rounds, int bytes, u8 const iv[])
| * aes_cbc_cts_decrypt(u8 out[], u8 const in[], u32 const rk[],
| * int rounds, int bytes, u8 const iv[])
| */
|
| AES_FUNC_START(aes_cbc_cts_encrypt)
| adr_l x8, .Lcts_permute_table
| sub x4, x4, #16
| add x9, x8, #32
| add x8, x8, x4
| sub x9, x9, x4
| ld1 {v3.16b}, [x8]
| ld1 {v4.16b}, [x9]
|
| ld1 {v0.16b}, [x1], x4 /* overlapping loads */
| ld1 {v1.16b}, [x1]
|
| ld1 {v5.16b}, [x5] /* get iv */
| enc_prepare w3, x2, x6
|
| eor v0.16b, v0.16b, v5.16b /* xor with iv */
| tbl v1.16b, {v1.16b}, v4.16b
| encrypt_block v0, w3, x2, x6, w7
|
| eor v1.16b, v1.16b, v0.16b
| tbl v0.16b, {v0.16b}, v3.16b
| encrypt_block v1, w3, x2, x6, w7
|
| add x4, x0, x4
| st1 {v0.16b}, [x4] /* overlapping stores */
| st1 {v1.16b}, [x0]
| ret
| AES_FUNC_END(aes_cbc_cts_encrypt)
|
| AES_FUNC_START(aes_cbc_cts_decrypt)
| adr_l x8, .Lcts_permute_table
| sub x4, x4, #16
| add x9, x8, #32
| add x8, x8, x4
| sub x9, x9, x4
| ld1 {v3.16b}, [x8]
| ld1 {v4.16b}, [x9]
|
| ld1 {v0.16b}, [x1], x4 /* overlapping loads */
| ld1 {v1.16b}, [x1]
|
| ld1 {v5.16b}, [x5] /* get iv */
| dec_prepare w3, x2, x6
|
| decrypt_block v0, w3, x2, x6, w7
| tbl v2.16b, {v0.16b}, v3.16b
| eor v2.16b, v2.16b, v1.16b
|
| tbx v0.16b, {v1.16b}, v4.16b
| decrypt_block v0, w3, x2, x6, w7
| eor v0.16b, v0.16b, v5.16b /* xor with iv */
|
| add x4, x0, x4
| st1 {v2.16b}, [x4] /* overlapping stores */
| st1 {v0.16b}, [x0]
| ret
| AES_FUNC_END(aes_cbc_cts_decrypt)
|
| .section ".rodata", "a"
| .align 6
| .Lcts_permute_table:
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7
| .byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .previous
|
|
| /*
| * aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
| * int blocks, u8 ctr[])
| */
|
| AES_FUNC_START(aes_ctr_encrypt)
| stp x29, x30, [sp, #-16]!
| mov x29, sp
|
| enc_prepare w3, x2, x6
| ld1 {vctr.16b}, [x5]
|
| umov x6, vctr.d[1] /* keep swabbed ctr in reg */
| rev x6, x6
| cmn w6, w4 /* 32 bit overflow? */
| bcs .Lctrloop
| .LctrloopNx:
| subs w4, w4, #MAX_STRIDE
| bmi .Lctr1x
| add w7, w6, #1
| mov v0.16b, vctr.16b
| add w8, w6, #2
| mov v1.16b, vctr.16b
| add w9, w6, #3
| mov v2.16b, vctr.16b
| add w9, w6, #3
| rev w7, w7
| mov v3.16b, vctr.16b
| rev w8, w8
| ST5( mov v4.16b, vctr.16b )
| mov v1.s[3], w7
| rev w9, w9
| ST5( add w10, w6, #4 )
| mov v2.s[3], w8
| ST5( rev w10, w10 )
| mov v3.s[3], w9
| ST5( mov v4.s[3], w10 )
| ld1 {v5.16b-v7.16b}, [x1], #48 /* get 3 input blocks */
| ST4( bl aes_encrypt_block4x )
| ST5( bl aes_encrypt_block5x )
| eor v0.16b, v5.16b, v0.16b
| ST4( ld1 {v5.16b}, [x1], #16 )
| eor v1.16b, v6.16b, v1.16b
| ST5( ld1 {v5.16b-v6.16b}, [x1], #32 )
| eor v2.16b, v7.16b, v2.16b
| eor v3.16b, v5.16b, v3.16b
| ST5( eor v4.16b, v6.16b, v4.16b )
| st1 {v0.16b-v3.16b}, [x0], #64
| ST5( st1 {v4.16b}, [x0], #16 )
| add x6, x6, #MAX_STRIDE
| rev x7, x6
| ins vctr.d[1], x7
| cbz w4, .Lctrout
| b .LctrloopNx
| .Lctr1x:
| adds w4, w4, #MAX_STRIDE
| beq .Lctrout
| .Lctrloop:
| mov v0.16b, vctr.16b
| encrypt_block v0, w3, x2, x8, w7
|
| adds x6, x6, #1 /* increment BE ctr */
| rev x7, x6
| ins vctr.d[1], x7
| bcs .Lctrcarry /* overflow? */
|
| .Lctrcarrydone:
| subs w4, w4, #1
| bmi .Lctrtailblock /* blocks <0 means tail block */
| ld1 {v3.16b}, [x1], #16
| eor v3.16b, v0.16b, v3.16b
| st1 {v3.16b}, [x0], #16
| bne .Lctrloop
|
| .Lctrout:
| st1 {vctr.16b}, [x5] /* return next CTR value */
| ldp x29, x30, [sp], #16
| ret
|
| .Lctrtailblock:
| st1 {v0.16b}, [x0]
| b .Lctrout
|
| .Lctrcarry:
| umov x7, vctr.d[0] /* load upper word of ctr */
| rev x7, x7 /* ... to handle the carry */
| add x7, x7, #1
| rev x7, x7
| ins vctr.d[0], x7
| b .Lctrcarrydone
| AES_FUNC_END(aes_ctr_encrypt)
|
|
| /*
| * aes_xts_encrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
| * int bytes, u8 const rk2[], u8 iv[], int first)
| * aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
| * int bytes, u8 const rk2[], u8 iv[], int first)
| */
|
| .macro next_tweak, out, in, tmp
| sshr \tmp\().2d, \in\().2d, #63
| and \tmp\().16b, \tmp\().16b, xtsmask.16b
| add \out\().2d, \in\().2d, \in\().2d
| ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8
| eor \out\().16b, \out\().16b, \tmp\().16b
| .endm
|
| .macro xts_load_mask, tmp
| movi xtsmask.2s, #0x1
| movi \tmp\().2s, #0x87
| uzp1 xtsmask.4s, xtsmask.4s, \tmp\().4s
| .endm
|
| AES_FUNC_START(aes_xts_encrypt)
| stp x29, x30, [sp, #-16]!
| mov x29, sp
|
| ld1 {v4.16b}, [x6]
| xts_load_mask v8
| cbz w7, .Lxtsencnotfirst
|
| enc_prepare w3, x5, x8
| xts_cts_skip_tw w7, .LxtsencNx
| encrypt_block v4, w3, x5, x8, w7 /* first tweak */
| enc_switch_key w3, x2, x8
| b .LxtsencNx
|
| .Lxtsencnotfirst:
| enc_prepare w3, x2, x8
| .LxtsencloopNx:
| next_tweak v4, v4, v8
| .LxtsencNx:
| subs w4, w4, #64
| bmi .Lxtsenc1x
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
| next_tweak v5, v4, v8
| eor v0.16b, v0.16b, v4.16b
| next_tweak v6, v5, v8
| eor v1.16b, v1.16b, v5.16b
| eor v2.16b, v2.16b, v6.16b
| next_tweak v7, v6, v8
| eor v3.16b, v3.16b, v7.16b
| bl aes_encrypt_block4x
| eor v3.16b, v3.16b, v7.16b
| eor v0.16b, v0.16b, v4.16b
| eor v1.16b, v1.16b, v5.16b
| eor v2.16b, v2.16b, v6.16b
| st1 {v0.16b-v3.16b}, [x0], #64
| mov v4.16b, v7.16b
| cbz w4, .Lxtsencret
| xts_reload_mask v8
| b .LxtsencloopNx
| .Lxtsenc1x:
| adds w4, w4, #64
| beq .Lxtsencout
| subs w4, w4, #16
| bmi .LxtsencctsNx
| .Lxtsencloop:
| ld1 {v0.16b}, [x1], #16
| .Lxtsencctsout:
| eor v0.16b, v0.16b, v4.16b
| encrypt_block v0, w3, x2, x8, w7
| eor v0.16b, v0.16b, v4.16b
| cbz w4, .Lxtsencout
| subs w4, w4, #16
| next_tweak v4, v4, v8
| bmi .Lxtsenccts
| st1 {v0.16b}, [x0], #16
| b .Lxtsencloop
| .Lxtsencout:
| st1 {v0.16b}, [x0]
| .Lxtsencret:
| st1 {v4.16b}, [x6]
| ldp x29, x30, [sp], #16
| ret
|
| .LxtsencctsNx:
| mov v0.16b, v3.16b
| sub x0, x0, #16
| .Lxtsenccts:
| adr_l x8, .Lcts_permute_table
|
| add x1, x1, w4, sxtw /* rewind input pointer */
| add w4, w4, #16 /* # bytes in final block */
| add x9, x8, #32
| add x8, x8, x4
| sub x9, x9, x4
| add x4, x0, x4 /* output address of final block */
|
| ld1 {v1.16b}, [x1] /* load final block */
| ld1 {v2.16b}, [x8]
| ld1 {v3.16b}, [x9]
|
| tbl v2.16b, {v0.16b}, v2.16b
| tbx v0.16b, {v1.16b}, v3.16b
| st1 {v2.16b}, [x4] /* overlapping stores */
| mov w4, wzr
| b .Lxtsencctsout
| AES_FUNC_END(aes_xts_encrypt)
|
| AES_FUNC_START(aes_xts_decrypt)
| stp x29, x30, [sp, #-16]!
| mov x29, sp
|
| /* subtract 16 bytes if we are doing CTS */
| sub w8, w4, #0x10
| tst w4, #0xf
| csel w4, w4, w8, eq
|
| ld1 {v4.16b}, [x6]
| xts_load_mask v8
| xts_cts_skip_tw w7, .Lxtsdecskiptw
| cbz w7, .Lxtsdecnotfirst
|
| enc_prepare w3, x5, x8
| encrypt_block v4, w3, x5, x8, w7 /* first tweak */
| .Lxtsdecskiptw:
| dec_prepare w3, x2, x8
| b .LxtsdecNx
|
| .Lxtsdecnotfirst:
| dec_prepare w3, x2, x8
| .LxtsdecloopNx:
| next_tweak v4, v4, v8
| .LxtsdecNx:
| subs w4, w4, #64
| bmi .Lxtsdec1x
| ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
| next_tweak v5, v4, v8
| eor v0.16b, v0.16b, v4.16b
| next_tweak v6, v5, v8
| eor v1.16b, v1.16b, v5.16b
| eor v2.16b, v2.16b, v6.16b
| next_tweak v7, v6, v8
| eor v3.16b, v3.16b, v7.16b
| bl aes_decrypt_block4x
| eor v3.16b, v3.16b, v7.16b
| eor v0.16b, v0.16b, v4.16b
| eor v1.16b, v1.16b, v5.16b
| eor v2.16b, v2.16b, v6.16b
| st1 {v0.16b-v3.16b}, [x0], #64
| mov v4.16b, v7.16b
| cbz w4, .Lxtsdecout
| xts_reload_mask v8
| b .LxtsdecloopNx
| .Lxtsdec1x:
| adds w4, w4, #64
| beq .Lxtsdecout
| subs w4, w4, #16
| .Lxtsdecloop:
| ld1 {v0.16b}, [x1], #16
| bmi .Lxtsdeccts
| .Lxtsdecctsout:
| eor v0.16b, v0.16b, v4.16b
| decrypt_block v0, w3, x2, x8, w7
| eor v0.16b, v0.16b, v4.16b
| st1 {v0.16b}, [x0], #16
| cbz w4, .Lxtsdecout
| subs w4, w4, #16
| next_tweak v4, v4, v8
| b .Lxtsdecloop
| .Lxtsdecout:
| st1 {v4.16b}, [x6]
| ldp x29, x30, [sp], #16
| ret
|
| .Lxtsdeccts:
| adr_l x8, .Lcts_permute_table
|
| add x1, x1, w4, sxtw /* rewind input pointer */
| add w4, w4, #16 /* # bytes in final block */
| add x9, x8, #32
| add x8, x8, x4
| sub x9, x9, x4
| add x4, x0, x4 /* output address of final block */
|
| next_tweak v5, v4, v8
|
| ld1 {v1.16b}, [x1] /* load final block */
| ld1 {v2.16b}, [x8]
| ld1 {v3.16b}, [x9]
|
| eor v0.16b, v0.16b, v5.16b
| decrypt_block v0, w3, x2, x8, w7
| eor v0.16b, v0.16b, v5.16b
|
| tbl v2.16b, {v0.16b}, v2.16b
| tbx v0.16b, {v1.16b}, v3.16b
|
| st1 {v2.16b}, [x4] /* overlapping stores */
| mov w4, wzr
| b .Lxtsdecctsout
| AES_FUNC_END(aes_xts_decrypt)
|
| /*
| * aes_mac_update(u8 const in[], u32 const rk[], int rounds,
| * int blocks, u8 dg[], int enc_before, int enc_after)
| */
| AES_FUNC_START(aes_mac_update)
| ld1 {v0.16b}, [x4] /* get dg */
| enc_prepare w2, x1, x7
| cbz w5, .Lmacloop4x
|
| encrypt_block v0, w2, x1, x7, w8
|
| .Lmacloop4x:
| subs w3, w3, #4
| bmi .Lmac1x
| ld1 {v1.16b-v4.16b}, [x0], #64 /* get next pt block */
| eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
| encrypt_block v0, w2, x1, x7, w8
| eor v0.16b, v0.16b, v2.16b
| encrypt_block v0, w2, x1, x7, w8
| eor v0.16b, v0.16b, v3.16b
| encrypt_block v0, w2, x1, x7, w8
| eor v0.16b, v0.16b, v4.16b
| cmp w3, wzr
| csinv x5, x6, xzr, eq
| cbz w5, .Lmacout
| encrypt_block v0, w2, x1, x7, w8
| st1 {v0.16b}, [x4] /* return dg */
| cond_yield .Lmacout, x7, x8
| b .Lmacloop4x
| .Lmac1x:
| add w3, w3, #4
| .Lmacloop:
| cbz w3, .Lmacout
| ld1 {v1.16b}, [x0], #16 /* get next pt block */
| eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
|
| subs w3, w3, #1
| csinv x5, x6, xzr, eq
| cbz w5, .Lmacout
|
| .Lmacenc:
| encrypt_block v0, w2, x1, x7, w8
| b .Lmacloop
|
| .Lmacout:
| st1 {v0.16b}, [x4] /* return dg */
| mov w0, w3
| ret
| AES_FUNC_END(aes_mac_update)
|
|
