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|
/* sm4-armv8-aarch64-ce.S - ARMv8/AArch64/CE accelerated SM4 cipher
*
* Copyright (C) 2022 Alibaba Group.
* Copyright (C) 2022 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "asm-common-aarch64.h"
#if defined(__AARCH64EL__) && \
defined(HAVE_COMPATIBLE_GCC_AARCH64_PLATFORM_AS) && \
defined(HAVE_GCC_INLINE_ASM_AARCH64_CRYPTO) && \
defined(USE_SM4)
.cpu generic+simd+crypto
#define vecnum_v0 0
#define vecnum_v1 1
#define vecnum_v2 2
#define vecnum_v3 3
#define vecnum_v4 4
#define vecnum_v5 5
#define vecnum_v6 6
#define vecnum_v7 7
#define vecnum_v16 16
#define vecnum_v24 24
#define vecnum_v25 25
#define vecnum_v26 26
#define vecnum_v27 27
#define vecnum_v28 28
#define vecnum_v29 29
#define vecnum_v30 30
#define vecnum_v31 31
#define sm4e(vd, vn) \
.inst (0xcec08400 | (vecnum_##vn << 5) | vecnum_##vd)
#define sm4ekey(vd, vn, vm) \
.inst (0xce60c800 | (vecnum_##vm << 16) | (vecnum_##vn << 5) | vecnum_##vd)
.text
/* Register macros */
#define RTMP0 v16
#define RTMP1 v17
#define RTMP2 v18
#define RTMP3 v19
#define RIV v20
#define RMASK v21
/* Helper macros. */
#define load_rkey(ptr) \
ld1 {v24.16b-v27.16b}, [ptr], #64; \
ld1 {v28.16b-v31.16b}, [ptr];
#define SM4_CRYPT_BLK(b0) \
rev32 b0.16b, b0.16b; \
sm4e(b0, v24); \
sm4e(b0, v25); \
sm4e(b0, v26); \
sm4e(b0, v27); \
sm4e(b0, v28); \
sm4e(b0, v29); \
sm4e(b0, v30); \
sm4e(b0, v31); \
rev64 b0.4s, b0.4s; \
ext b0.16b, b0.16b, b0.16b, #8; \
rev32 b0.16b, b0.16b;
#define crypt_blk4(b0, b1, b2, b3) \
rev32 b0.16b, b0.16b; \
rev32 b1.16b, b1.16b; \
rev32 b2.16b, b2.16b; \
rev32 b3.16b, b3.16b; \
sm4e(b0, v24); \
sm4e(b1, v24); \
sm4e(b2, v24); \
sm4e(b3, v24); \
sm4e(b0, v25); \
sm4e(b1, v25); \
sm4e(b2, v25); \
sm4e(b3, v25); \
sm4e(b0, v26); \
sm4e(b1, v26); \
sm4e(b2, v26); \
sm4e(b3, v26); \
sm4e(b0, v27); \
sm4e(b1, v27); \
sm4e(b2, v27); \
sm4e(b3, v27); \
sm4e(b0, v28); \
sm4e(b1, v28); \
sm4e(b2, v28); \
sm4e(b3, v28); \
sm4e(b0, v29); \
sm4e(b1, v29); \
sm4e(b2, v29); \
sm4e(b3, v29); \
sm4e(b0, v30); \
sm4e(b1, v30); \
sm4e(b2, v30); \
sm4e(b3, v30); \
sm4e(b0, v31); \
sm4e(b1, v31); \
sm4e(b2, v31); \
sm4e(b3, v31); \
rev64 b0.4s, b0.4s; \
rev64 b1.4s, b1.4s; \
rev64 b2.4s, b2.4s; \
rev64 b3.4s, b3.4s; \
ext b0.16b, b0.16b, b0.16b, #8; \
ext b1.16b, b1.16b, b1.16b, #8; \
ext b2.16b, b2.16b, b2.16b, #8; \
ext b3.16b, b3.16b, b3.16b, #8; \
rev32 b0.16b, b0.16b; \
rev32 b1.16b, b1.16b; \
rev32 b2.16b, b2.16b; \
rev32 b3.16b, b3.16b;
#define crypt_blk8(b0, b1, b2, b3, b4, b5, b6, b7) \
rev32 b0.16b, b0.16b; \
rev32 b1.16b, b1.16b; \
rev32 b2.16b, b2.16b; \
rev32 b3.16b, b3.16b; \
rev32 b4.16b, b4.16b; \
rev32 b5.16b, b5.16b; \
rev32 b6.16b, b6.16b; \
rev32 b7.16b, b7.16b; \
sm4e(b0, v24); \
sm4e(b1, v24); \
sm4e(b2, v24); \
sm4e(b3, v24); \
sm4e(b4, v24); \
sm4e(b5, v24); \
sm4e(b6, v24); \
sm4e(b7, v24); \
sm4e(b0, v25); \
sm4e(b1, v25); \
sm4e(b2, v25); \
sm4e(b3, v25); \
sm4e(b4, v25); \
sm4e(b5, v25); \
sm4e(b6, v25); \
sm4e(b7, v25); \
sm4e(b0, v26); \
sm4e(b1, v26); \
sm4e(b2, v26); \
sm4e(b3, v26); \
sm4e(b4, v26); \
sm4e(b5, v26); \
sm4e(b6, v26); \
sm4e(b7, v26); \
sm4e(b0, v27); \
sm4e(b1, v27); \
sm4e(b2, v27); \
sm4e(b3, v27); \
sm4e(b4, v27); \
sm4e(b5, v27); \
sm4e(b6, v27); \
sm4e(b7, v27); \
sm4e(b0, v28); \
sm4e(b1, v28); \
sm4e(b2, v28); \
sm4e(b3, v28); \
sm4e(b4, v28); \
sm4e(b5, v28); \
sm4e(b6, v28); \
sm4e(b7, v28); \
sm4e(b0, v29); \
sm4e(b1, v29); \
sm4e(b2, v29); \
sm4e(b3, v29); \
sm4e(b4, v29); \
sm4e(b5, v29); \
sm4e(b6, v29); \
sm4e(b7, v29); \
sm4e(b0, v30); \
sm4e(b1, v30); \
sm4e(b2, v30); \
sm4e(b3, v30); \
sm4e(b4, v30); \
sm4e(b5, v30); \
sm4e(b6, v30); \
sm4e(b7, v30); \
sm4e(b0, v31); \
sm4e(b1, v31); \
sm4e(b2, v31); \
sm4e(b3, v31); \
sm4e(b4, v31); \
sm4e(b5, v31); \
sm4e(b6, v31); \
sm4e(b7, v31); \
rev64 b0.4s, b0.4s; \
rev64 b1.4s, b1.4s; \
rev64 b2.4s, b2.4s; \
rev64 b3.4s, b3.4s; \
rev64 b4.4s, b4.4s; \
rev64 b5.4s, b5.4s; \
rev64 b6.4s, b6.4s; \
rev64 b7.4s, b7.4s; \
ext b0.16b, b0.16b, b0.16b, #8; \
ext b1.16b, b1.16b, b1.16b, #8; \
ext b2.16b, b2.16b, b2.16b, #8; \
ext b3.16b, b3.16b, b3.16b, #8; \
ext b4.16b, b4.16b, b4.16b, #8; \
ext b5.16b, b5.16b, b5.16b, #8; \
ext b6.16b, b6.16b, b6.16b, #8; \
ext b7.16b, b7.16b, b7.16b, #8; \
rev32 b0.16b, b0.16b; \
rev32 b1.16b, b1.16b; \
rev32 b2.16b, b2.16b; \
rev32 b3.16b, b3.16b; \
rev32 b4.16b, b4.16b; \
rev32 b5.16b, b5.16b; \
rev32 b6.16b, b6.16b; \
rev32 b7.16b, b7.16b;
.align 4
.global _gcry_sm4_armv8_ce_expand_key
ELF(.type _gcry_sm4_armv8_ce_expand_key,%function;)
_gcry_sm4_armv8_ce_expand_key:
/* input:
* x0: 128-bit key
* x1: rkey_enc
* x2: rkey_dec
* x3: fk array
* x4: ck array
*/
CFI_STARTPROC();
ld1 {v0.16b}, [x0];
rev32 v0.16b, v0.16b;
ld1 {v1.16b}, [x3];
load_rkey(x4);
/* input ^ fk */
eor v0.16b, v0.16b, v1.16b;
sm4ekey(v0, v0, v24);
sm4ekey(v1, v0, v25);
sm4ekey(v2, v1, v26);
sm4ekey(v3, v2, v27);
sm4ekey(v4, v3, v28);
sm4ekey(v5, v4, v29);
sm4ekey(v6, v5, v30);
sm4ekey(v7, v6, v31);
st1 {v0.16b-v3.16b}, [x1], #64;
st1 {v4.16b-v7.16b}, [x1];
rev64 v7.4s, v7.4s;
rev64 v6.4s, v6.4s;
rev64 v5.4s, v5.4s;
rev64 v4.4s, v4.4s;
rev64 v3.4s, v3.4s;
rev64 v2.4s, v2.4s;
rev64 v1.4s, v1.4s;
rev64 v0.4s, v0.4s;
ext v7.16b, v7.16b, v7.16b, #8;
ext v6.16b, v6.16b, v6.16b, #8;
ext v5.16b, v5.16b, v5.16b, #8;
ext v4.16b, v4.16b, v4.16b, #8;
ext v3.16b, v3.16b, v3.16b, #8;
ext v2.16b, v2.16b, v2.16b, #8;
ext v1.16b, v1.16b, v1.16b, #8;
ext v0.16b, v0.16b, v0.16b, #8;
st1 {v7.16b}, [x2], #16;
st1 {v6.16b}, [x2], #16;
st1 {v5.16b}, [x2], #16;
st1 {v4.16b}, [x2], #16;
st1 {v3.16b}, [x2], #16;
st1 {v2.16b}, [x2], #16;
st1 {v1.16b}, [x2], #16;
st1 {v0.16b}, [x2];
ret_spec_stop;
CFI_ENDPROC();
ELF(.size _gcry_sm4_armv8_ce_expand_key,.-_gcry_sm4_armv8_ce_expand_key;)
.align 4
ELF(.type sm4_armv8_ce_crypt_blk1_4,%function;)
sm4_armv8_ce_crypt_blk1_4:
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: num blocks (1..4)
*/
CFI_STARTPROC();
load_rkey(x0);
ld1 {v0.16b}, [x2], #16;
mov v1.16b, v0.16b;
mov v2.16b, v0.16b;
mov v3.16b, v0.16b;
cmp x3, #2;
blt .Lblk4_load_input_done;
ld1 {v1.16b}, [x2], #16;
beq .Lblk4_load_input_done;
ld1 {v2.16b}, [x2], #16;
cmp x3, #3;
beq .Lblk4_load_input_done;
ld1 {v3.16b}, [x2];
.Lblk4_load_input_done:
crypt_blk4(v0, v1, v2, v3);
st1 {v0.16b}, [x1], #16;
cmp x3, #2;
blt .Lblk4_store_output_done;
st1 {v1.16b}, [x1], #16;
beq .Lblk4_store_output_done;
st1 {v2.16b}, [x1], #16;
cmp x3, #3;
beq .Lblk4_store_output_done;
st1 {v3.16b}, [x1];
.Lblk4_store_output_done:
ret_spec_stop;
CFI_ENDPROC();
ELF(.size sm4_armv8_ce_crypt_blk1_4,.-sm4_armv8_ce_crypt_blk1_4;)
.align 4
.global _gcry_sm4_armv8_ce_crypt_blk1_8
ELF(.type _gcry_sm4_armv8_ce_crypt_blk1_8,%function;)
_gcry_sm4_armv8_ce_crypt_blk1_8:
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: num blocks (1..8)
*/
CFI_STARTPROC();
cmp x3, #5;
blt sm4_armv8_ce_crypt_blk1_4;
load_rkey(x0);
ld1 {v0.16b-v3.16b}, [x2], #64;
ld1 {v4.16b}, [x2], #16;
mov v5.16b, v4.16b;
mov v6.16b, v4.16b;
mov v7.16b, v4.16b;
beq .Lblk8_load_input_done;
ld1 {v5.16b}, [x2], #16;
cmp x3, #7;
blt .Lblk8_load_input_done;
ld1 {v6.16b}, [x2], #16;
beq .Lblk8_load_input_done;
ld1 {v7.16b}, [x2];
.Lblk8_load_input_done:
crypt_blk8(v0, v1, v2, v3, v4, v5, v6, v7);
cmp x3, #6;
st1 {v0.16b-v3.16b}, [x1], #64;
st1 {v4.16b}, [x1], #16;
blt .Lblk8_store_output_done;
st1 {v5.16b}, [x1], #16;
beq .Lblk8_store_output_done;
st1 {v6.16b}, [x1], #16;
cmp x3, #7;
beq .Lblk8_store_output_done;
st1 {v7.16b}, [x1];
.Lblk8_store_output_done:
ret_spec_stop;
CFI_ENDPROC();
ELF(.size _gcry_sm4_armv8_ce_crypt_blk1_8,.-_gcry_sm4_armv8_ce_crypt_blk1_8;)
.align 4
.global _gcry_sm4_armv8_ce_crypt
ELF(.type _gcry_sm4_armv8_ce_crypt,%function;)
_gcry_sm4_armv8_ce_crypt:
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: nblocks (multiples of 8)
*/
CFI_STARTPROC();
load_rkey(x0);
.Lcrypt_loop_blk:
subs x3, x3, #8;
bmi .Lcrypt_end;
ld1 {v0.16b-v3.16b}, [x2], #64;
ld1 {v4.16b-v7.16b}, [x2], #64;
crypt_blk8(v0, v1, v2, v3, v4, v5, v6, v7);
st1 {v0.16b-v3.16b}, [x1], #64;
st1 {v4.16b-v7.16b}, [x1], #64;
b .Lcrypt_loop_blk;
.Lcrypt_end:
ret_spec_stop;
CFI_ENDPROC();
ELF(.size _gcry_sm4_armv8_ce_crypt,.-_gcry_sm4_armv8_ce_crypt;)
.align 4
.global _gcry_sm4_armv8_ce_cbc_dec
ELF(.type _gcry_sm4_armv8_ce_cbc_dec,%function;)
_gcry_sm4_armv8_ce_cbc_dec:
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
* x4: nblocks (multiples of 8)
*/
CFI_STARTPROC();
load_rkey(x0);
ld1 {RIV.16b}, [x3];
.Lcbc_loop_blk:
subs x4, x4, #8;
bmi .Lcbc_end;
ld1 {v0.16b-v3.16b}, [x2], #64;
ld1 {v4.16b-v7.16b}, [x2];
crypt_blk8(v0, v1, v2, v3, v4, v5, v6, v7);
sub x2, x2, #64;
eor v0.16b, v0.16b, RIV.16b;
ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
eor v1.16b, v1.16b, RTMP0.16b;
eor v2.16b, v2.16b, RTMP1.16b;
eor v3.16b, v3.16b, RTMP2.16b;
st1 {v0.16b-v3.16b}, [x1], #64;
eor v4.16b, v4.16b, RTMP3.16b;
ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
eor v5.16b, v5.16b, RTMP0.16b;
eor v6.16b, v6.16b, RTMP1.16b;
eor v7.16b, v7.16b, RTMP2.16b;
mov RIV.16b, RTMP3.16b;
st1 {v4.16b-v7.16b}, [x1], #64;
b .Lcbc_loop_blk;
.Lcbc_end:
/* store new IV */
st1 {RIV.16b}, [x3];
ret_spec_stop;
CFI_ENDPROC();
ELF(.size _gcry_sm4_armv8_ce_cbc_dec,.-_gcry_sm4_armv8_ce_cbc_dec;)
.align 4
.global _gcry_sm4_armv8_ce_cfb_dec
ELF(.type _gcry_sm4_armv8_ce_cfb_dec,%function;)
_gcry_sm4_armv8_ce_cfb_dec:
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
* x4: nblocks (multiples of 8)
*/
CFI_STARTPROC();
load_rkey(x0);
ld1 {v0.16b}, [x3];
.Lcfb_loop_blk:
subs x4, x4, #8;
bmi .Lcfb_end;
ld1 {v1.16b, v2.16b, v3.16b}, [x2], #48;
ld1 {v4.16b-v7.16b}, [x2];
crypt_blk8(v0, v1, v2, v3, v4, v5, v6, v7);
sub x2, x2, #48;
ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
eor v0.16b, v0.16b, RTMP0.16b;
eor v1.16b, v1.16b, RTMP1.16b;
eor v2.16b, v2.16b, RTMP2.16b;
eor v3.16b, v3.16b, RTMP3.16b;
st1 {v0.16b-v3.16b}, [x1], #64;
ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
eor v4.16b, v4.16b, RTMP0.16b;
eor v5.16b, v5.16b, RTMP1.16b;
eor v6.16b, v6.16b, RTMP2.16b;
eor v7.16b, v7.16b, RTMP3.16b;
st1 {v4.16b-v7.16b}, [x1], #64;
mov v0.16b, RTMP3.16b;
b .Lcfb_loop_blk;
.Lcfb_end:
/* store new IV */
st1 {v0.16b}, [x3];
ret_spec_stop;
CFI_ENDPROC();
ELF(.size _gcry_sm4_armv8_ce_cfb_dec,.-_gcry_sm4_armv8_ce_cfb_dec;)
.align 4
.global _gcry_sm4_armv8_ce_ctr_enc
ELF(.type _gcry_sm4_armv8_ce_ctr_enc,%function;)
_gcry_sm4_armv8_ce_ctr_enc:
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: ctr (big endian, 128 bit)
* x4: nblocks (multiples of 8)
*/
CFI_STARTPROC();
load_rkey(x0);
ldp x7, x8, [x3];
rev x7, x7;
rev x8, x8;
.Lctr_loop_blk:
subs x4, x4, #8;
bmi .Lctr_end;
#define inc_le128(vctr) \
mov vctr.d[1], x8; \
mov vctr.d[0], x7; \
adds x8, x8, #1; \
adc x7, x7, xzr; \
rev64 vctr.16b, vctr.16b;
/* construct CTRs */
inc_le128(v0); /* +0 */
inc_le128(v1); /* +1 */
inc_le128(v2); /* +2 */
inc_le128(v3); /* +3 */
inc_le128(v4); /* +4 */
inc_le128(v5); /* +5 */
inc_le128(v6); /* +6 */
inc_le128(v7); /* +7 */
crypt_blk8(v0, v1, v2, v3, v4, v5, v6, v7);
ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
eor v0.16b, v0.16b, RTMP0.16b;
eor v1.16b, v1.16b, RTMP1.16b;
eor v2.16b, v2.16b, RTMP2.16b;
eor v3.16b, v3.16b, RTMP3.16b;
st1 {v0.16b-v3.16b}, [x1], #64;
ld1 {RTMP0.16b-RTMP3.16b}, [x2], #64;
eor v4.16b, v4.16b, RTMP0.16b;
eor v5.16b, v5.16b, RTMP1.16b;
eor v6.16b, v6.16b, RTMP2.16b;
eor v7.16b, v7.16b, RTMP3.16b;
st1 {v4.16b-v7.16b}, [x1], #64;
b .Lctr_loop_blk;
.Lctr_end:
/* store new CTR */
rev x7, x7;
rev x8, x8;
stp x7, x8, [x3];
ret_spec_stop;
CFI_ENDPROC();
ELF(.size _gcry_sm4_armv8_ce_ctr_enc,.-_gcry_sm4_armv8_ce_ctr_enc;)
.align 4
.global _gcry_sm4_armv8_ce_xts_crypt
ELF(.type _gcry_sm4_armv8_ce_xts_crypt,%function;)
_gcry_sm4_armv8_ce_xts_crypt:
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: tweak (big endian, 128 bit)
* x4: nblocks
*/
CFI_STARTPROC()
VPUSH_ABI
load_rkey(x0)
mov x7, #0x87
mov x8, #0x1
mov RMASK.d[0], x7
mov RMASK.d[1], x8
ld1 {RIV.16b}, [x3]
mov v8.16b, RIV.16b
ext RIV.16b, RIV.16b, RIV.16b, #8
.Lxts_loop_blk:
sub x4, x4, #8
tbnz x4, #63, .Lxts_tail8
#define tweak_next(vt, vin, RTMP) \
sshr RTMP.2d, RIV.2d, #63; \
add vt.2d, vin.2d, vin.2d; \
and RTMP.16b, RTMP.16b, RMASK.16b; \
add RIV.2d, RIV.2d, RIV.2d; \
eor vt.16b, vt.16b, RTMP.16b;
tweak_next( v9, v8, RTMP0)
tweak_next(v10, v9, RTMP1)
tweak_next(v11, v10, RTMP2)
tweak_next(v12, v11, RTMP3)
tweak_next(v13, v12, RTMP0)
tweak_next(v14, v13, RTMP1)
tweak_next(v15, v14, RTMP2)
ld1 {v0.16b-v3.16b}, [x2], #64
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
ld1 {v4.16b-v7.16b}, [x2], #64
eor v4.16b, v4.16b, v12.16b
eor v5.16b, v5.16b, v13.16b
eor v6.16b, v6.16b, v14.16b
eor v7.16b, v7.16b, v15.16b
crypt_blk8(v0, v1, v2, v3, v4, v5, v6, v7)
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
st1 {v0.16b-v3.16b}, [x1], #64
eor v4.16b, v4.16b, v12.16b
eor v5.16b, v5.16b, v13.16b
eor v6.16b, v6.16b, v14.16b
eor v7.16b, v7.16b, v15.16b
st1 {v4.16b-v7.16b}, [x1], #64
tweak_next(v8, v15, RTMP3)
cbz x4, .Lxts_end
b .Lxts_loop_blk
.Lxts_tail8:
add x4, x4, #8
cmp x4, #4
blt .Lxts_tail4
sub x4, x4, #4
tweak_next( v9, v8, RTMP0)
tweak_next(v10, v9, RTMP1)
tweak_next(v11, v10, RTMP2)
ld1 {v0.16b-v3.16b}, [x2], #64
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
crypt_blk4(v0, v1, v2, v3);
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
st1 {v0.16b-v3.16b}, [x1], #64
tweak_next(v8, v11, RTMP3)
cbz x4, .Lxts_end
.Lxts_tail4:
sub x4, x4, #1
ld1 {v0.16b}, [x2], #16
eor v0.16b, v0.16b, v8.16b
SM4_CRYPT_BLK(v0)
eor v0.16b, v0.16b, v8.16b
st1 {v0.16b}, [x1], #16
tweak_next(v8, v8, RTMP0)
cbnz x4, .Lxts_tail4
.Lxts_end:
/* store new tweak */
st1 {v8.16b}, [x3]
CLEAR_REG(v8)
CLEAR_REG(v9)
CLEAR_REG(v10)
CLEAR_REG(v11)
CLEAR_REG(v12)
CLEAR_REG(v13)
CLEAR_REG(v14)
CLEAR_REG(v15)
CLEAR_REG(RIV)
VPOP_ABI
ret_spec_stop
CFI_ENDPROC()
ELF(.size _gcry_sm4_armv8_ce_xts_crypt,.-_gcry_sm4_armv8_ce_xts_crypt;)
#endif
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