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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* SM4 Cipher Algorithm, AES-NI/AVX optimized.
* as specified in
* https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html
*
* Copyright (C) 2018 Markku-Juhani O. Saarinen <mjos@iki.fi>
* Copyright (C) 2020 Jussi Kivilinna <jussi.kivilinna@iki.fi>
* Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
*/
/* Based on SM4 AES-NI work by libgcrypt and Markku-Juhani O. Saarinen at:
* https://github.com/mjosaarinen/sm4ni
*/
#include <linux/linkage.h>
#include <linux/cfi_types.h>
#include <asm/frame.h>
#define rRIP (%rip)
#define RX0 %xmm0
#define RX1 %xmm1
#define MASK_4BIT %xmm2
#define RTMP0 %xmm3
#define RTMP1 %xmm4
#define RTMP2 %xmm5
#define RTMP3 %xmm6
#define RTMP4 %xmm7
#define RA0 %xmm8
#define RA1 %xmm9
#define RA2 %xmm10
#define RA3 %xmm11
#define RB0 %xmm12
#define RB1 %xmm13
#define RB2 %xmm14
#define RB3 %xmm15
#define RNOT %xmm0
#define RBSWAP %xmm1
/* Transpose four 32-bit words between 128-bit vectors. */
#define transpose_4x4(x0, x1, x2, x3, t1, t2) \
vpunpckhdq x1, x0, t2; \
vpunpckldq x1, x0, x0; \
\
vpunpckldq x3, x2, t1; \
vpunpckhdq x3, x2, x2; \
\
vpunpckhqdq t1, x0, x1; \
vpunpcklqdq t1, x0, x0; \
\
vpunpckhqdq x2, t2, x3; \
vpunpcklqdq x2, t2, x2;
/* pre-SubByte transform. */
#define transform_pre(x, lo_t, hi_t, mask4bit, tmp0) \
vpand x, mask4bit, tmp0; \
vpandn x, mask4bit, x; \
vpsrld $4, x, x; \
\
vpshufb tmp0, lo_t, tmp0; \
vpshufb x, hi_t, x; \
vpxor tmp0, x, x;
/* post-SubByte transform. Note: x has been XOR'ed with mask4bit by
* 'vaeslastenc' instruction.
*/
#define transform_post(x, lo_t, hi_t, mask4bit, tmp0) \
vpandn mask4bit, x, tmp0; \
vpsrld $4, x, x; \
vpand x, mask4bit, x; \
\
vpshufb tmp0, lo_t, tmp0; \
vpshufb x, hi_t, x; \
vpxor tmp0, x, x;
.section .rodata.cst16, "aM", @progbits, 16
.align 16
/*
* Following four affine transform look-up tables are from work by
* Markku-Juhani O. Saarinen, at https://github.com/mjosaarinen/sm4ni
*
* These allow exposing SM4 S-Box from AES SubByte.
*/
/* pre-SubByte affine transform, from SM4 field to AES field. */
.Lpre_tf_lo_s:
.quad 0x9197E2E474720701, 0xC7C1B4B222245157
.Lpre_tf_hi_s:
.quad 0xE240AB09EB49A200, 0xF052B91BF95BB012
/* post-SubByte affine transform, from AES field to SM4 field. */
.Lpost_tf_lo_s:
.quad 0x5B67F2CEA19D0834, 0xEDD14478172BBE82
.Lpost_tf_hi_s:
.quad 0xAE7201DD73AFDC00, 0x11CDBE62CC1063BF
/* For isolating SubBytes from AESENCLAST, inverse shift row */
.Linv_shift_row:
.byte 0x00, 0x0d, 0x0a, 0x07, 0x04, 0x01, 0x0e, 0x0b
.byte 0x08, 0x05, 0x02, 0x0f, 0x0c, 0x09, 0x06, 0x03
/* Inverse shift row + Rotate left by 8 bits on 32-bit words with vpshufb */
.Linv_shift_row_rol_8:
.byte 0x07, 0x00, 0x0d, 0x0a, 0x0b, 0x04, 0x01, 0x0e
.byte 0x0f, 0x08, 0x05, 0x02, 0x03, 0x0c, 0x09, 0x06
/* Inverse shift row + Rotate left by 16 bits on 32-bit words with vpshufb */
.Linv_shift_row_rol_16:
.byte 0x0a, 0x07, 0x00, 0x0d, 0x0e, 0x0b, 0x04, 0x01
.byte 0x02, 0x0f, 0x08, 0x05, 0x06, 0x03, 0x0c, 0x09
/* Inverse shift row + Rotate left by 24 bits on 32-bit words with vpshufb */
.Linv_shift_row_rol_24:
.byte 0x0d, 0x0a, 0x07, 0x00, 0x01, 0x0e, 0x0b, 0x04
.byte 0x05, 0x02, 0x0f, 0x08, 0x09, 0x06, 0x03, 0x0c
/* For CTR-mode IV byteswap */
.Lbswap128_mask:
.byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
/* For input word byte-swap */
.Lbswap32_mask:
.byte 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
.align 4
/* 4-bit mask */
.L0f0f0f0f:
.long 0x0f0f0f0f
/* 12 bytes, only for padding */
.Lpadding_deadbeef:
.long 0xdeadbeef, 0xdeadbeef, 0xdeadbeef
.text
/*
* void sm4_aesni_avx_crypt4(const u32 *rk, u8 *dst,
* const u8 *src, int nblocks)
*/
SYM_FUNC_START(sm4_aesni_avx_crypt4)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (1..4 blocks)
* %rdx: src (1..4 blocks)
* %rcx: num blocks (1..4)
*/
FRAME_BEGIN
vmovdqu 0*16(%rdx), RA0;
vmovdqa RA0, RA1;
vmovdqa RA0, RA2;
vmovdqa RA0, RA3;
cmpq $2, %rcx;
jb .Lblk4_load_input_done;
vmovdqu 1*16(%rdx), RA1;
je .Lblk4_load_input_done;
vmovdqu 2*16(%rdx), RA2;
cmpq $3, %rcx;
je .Lblk4_load_input_done;
vmovdqu 3*16(%rdx), RA3;
.Lblk4_load_input_done:
vmovdqa .Lbswap32_mask rRIP, RTMP2;
vpshufb RTMP2, RA0, RA0;
vpshufb RTMP2, RA1, RA1;
vpshufb RTMP2, RA2, RA2;
vpshufb RTMP2, RA3, RA3;
vbroadcastss .L0f0f0f0f rRIP, MASK_4BIT;
vmovdqa .Lpre_tf_lo_s rRIP, RTMP4;
vmovdqa .Lpre_tf_hi_s rRIP, RB0;
vmovdqa .Lpost_tf_lo_s rRIP, RB1;
vmovdqa .Lpost_tf_hi_s rRIP, RB2;
vmovdqa .Linv_shift_row rRIP, RB3;
vmovdqa .Linv_shift_row_rol_8 rRIP, RTMP2;
vmovdqa .Linv_shift_row_rol_16 rRIP, RTMP3;
transpose_4x4(RA0, RA1, RA2, RA3, RTMP0, RTMP1);
#define ROUND(round, s0, s1, s2, s3) \
vbroadcastss (4*(round))(%rdi), RX0; \
vpxor s1, RX0, RX0; \
vpxor s2, RX0, RX0; \
vpxor s3, RX0, RX0; /* s1 ^ s2 ^ s3 ^ rk */ \
\
/* sbox, non-linear part */ \
transform_pre(RX0, RTMP4, RB0, MASK_4BIT, RTMP0); \
vaesenclast MASK_4BIT, RX0, RX0; \
transform_post(RX0, RB1, RB2, MASK_4BIT, RTMP0); \
\
/* linear part */ \
vpshufb RB3, RX0, RTMP0; \
vpxor RTMP0, s0, s0; /* s0 ^ x */ \
vpshufb RTMP2, RX0, RTMP1; \
vpxor RTMP1, RTMP0, RTMP0; /* x ^ rol(x,8) */ \
vpshufb RTMP3, RX0, RTMP1; \
vpxor RTMP1, RTMP0, RTMP0; /* x ^ rol(x,8) ^ rol(x,16) */ \
vpshufb .Linv_shift_row_rol_24 rRIP, RX0, RTMP1; \
vpxor RTMP1, s0, s0; /* s0 ^ x ^ rol(x,24) */ \
vpslld $2, RTMP0, RTMP1; \
vpsrld $30, RTMP0, RTMP0; \
vpxor RTMP0, s0, s0; \
/* s0 ^ x ^ rol(x,2) ^ rol(x,10) ^ rol(x,18) ^ rol(x,24) */ \
vpxor RTMP1, s0, s0;
leaq (32*4)(%rdi), %rax;
.align 16
.Lroundloop_blk4:
ROUND(0, RA0, RA1, RA2, RA3);
ROUND(1, RA1, RA2, RA3, RA0);
ROUND(2, RA2, RA3, RA0, RA1);
ROUND(3, RA3, RA0, RA1, RA2);
leaq (4*4)(%rdi), %rdi;
cmpq %rax, %rdi;
jne .Lroundloop_blk4;
#undef ROUND
vmovdqa .Lbswap128_mask rRIP, RTMP2;
transpose_4x4(RA0, RA1, RA2, RA3, RTMP0, RTMP1);
vpshufb RTMP2, RA0, RA0;
vpshufb RTMP2, RA1, RA1;
vpshufb RTMP2, RA2, RA2;
vpshufb RTMP2, RA3, RA3;
vmovdqu RA0, 0*16(%rsi);
cmpq $2, %rcx;
jb .Lblk4_store_output_done;
vmovdqu RA1, 1*16(%rsi);
je .Lblk4_store_output_done;
vmovdqu RA2, 2*16(%rsi);
cmpq $3, %rcx;
je .Lblk4_store_output_done;
vmovdqu RA3, 3*16(%rsi);
.Lblk4_store_output_done:
vzeroall;
FRAME_END
RET;
SYM_FUNC_END(sm4_aesni_avx_crypt4)
SYM_FUNC_START_LOCAL(__sm4_crypt_blk8)
/* input:
* %rdi: round key array, CTX
* RA0, RA1, RA2, RA3, RB0, RB1, RB2, RB3: eight parallel
* plaintext blocks
* output:
* RA0, RA1, RA2, RA3, RB0, RB1, RB2, RB3: eight parallel
* ciphertext blocks
*/
FRAME_BEGIN
vmovdqa .Lbswap32_mask rRIP, RTMP2;
vpshufb RTMP2, RA0, RA0;
vpshufb RTMP2, RA1, RA1;
vpshufb RTMP2, RA2, RA2;
vpshufb RTMP2, RA3, RA3;
vpshufb RTMP2, RB0, RB0;
vpshufb RTMP2, RB1, RB1;
vpshufb RTMP2, RB2, RB2;
vpshufb RTMP2, RB3, RB3;
vbroadcastss .L0f0f0f0f rRIP, MASK_4BIT;
transpose_4x4(RA0, RA1, RA2, RA3, RTMP0, RTMP1);
transpose_4x4(RB0, RB1, RB2, RB3, RTMP0, RTMP1);
#define ROUND(round, s0, s1, s2, s3, r0, r1, r2, r3) \
vbroadcastss (4*(round))(%rdi), RX0; \
vmovdqa .Lpre_tf_lo_s rRIP, RTMP4; \
vmovdqa .Lpre_tf_hi_s rRIP, RTMP1; \
vmovdqa RX0, RX1; \
vpxor s1, RX0, RX0; \
vpxor s2, RX0, RX0; \
vpxor s3, RX0, RX0; /* s1 ^ s2 ^ s3 ^ rk */ \
vmovdqa .Lpost_tf_lo_s rRIP, RTMP2; \
vmovdqa .Lpost_tf_hi_s rRIP, RTMP3; \
vpxor r1, RX1, RX1; \
vpxor r2, RX1, RX1; \
vpxor r3, RX1, RX1; /* r1 ^ r2 ^ r3 ^ rk */ \
\
/* sbox, non-linear part */ \
transform_pre(RX0, RTMP4, RTMP1, MASK_4BIT, RTMP0); \
transform_pre(RX1, RTMP4, RTMP1, MASK_4BIT, RTMP0); \
vmovdqa .Linv_shift_row rRIP, RTMP4; \
vaesenclast MASK_4BIT, RX0, RX0; \
vaesenclast MASK_4BIT, RX1, RX1; \
transform_post(RX0, RTMP2, RTMP3, MASK_4BIT, RTMP0); \
transform_post(RX1, RTMP2, RTMP3, MASK_4BIT, RTMP0); \
\
/* linear part */ \
vpshufb RTMP4, RX0, RTMP0; \
vpxor RTMP0, s0, s0; /* s0 ^ x */ \
vpshufb RTMP4, RX1, RTMP2; \
vmovdqa .Linv_shift_row_rol_8 rRIP, RTMP4; \
vpxor RTMP2, r0, r0; /* r0 ^ x */ \
vpshufb RTMP4, RX0, RTMP1; \
vpxor RTMP1, RTMP0, RTMP0; /* x ^ rol(x,8) */ \
vpshufb RTMP4, RX1, RTMP3; \
vmovdqa .Linv_shift_row_rol_16 rRIP, RTMP4; \
vpxor RTMP3, RTMP2, RTMP2; /* x ^ rol(x,8) */ \
vpshufb RTMP4, RX0, RTMP1; \
vpxor RTMP1, RTMP0, RTMP0; /* x ^ rol(x,8) ^ rol(x,16) */ \
vpshufb RTMP4, RX1, RTMP3; \
vmovdqa .Linv_shift_row_rol_24 rRIP, RTMP4; \
vpxor RTMP3, RTMP2, RTMP2; /* x ^ rol(x,8) ^ rol(x,16) */ \
vpshufb RTMP4, RX0, RTMP1; \
vpxor RTMP1, s0, s0; /* s0 ^ x ^ rol(x,24) */ \
/* s0 ^ x ^ rol(x,2) ^ rol(x,10) ^ rol(x,18) ^ rol(x,24) */ \
vpslld $2, RTMP0, RTMP1; \
vpsrld $30, RTMP0, RTMP0; \
vpxor RTMP0, s0, s0; \
vpxor RTMP1, s0, s0; \
vpshufb RTMP4, RX1, RTMP3; \
vpxor RTMP3, r0, r0; /* r0 ^ x ^ rol(x,24) */ \
/* r0 ^ x ^ rol(x,2) ^ rol(x,10) ^ rol(x,18) ^ rol(x,24) */ \
vpslld $2, RTMP2, RTMP3; \
vpsrld $30, RTMP2, RTMP2; \
vpxor RTMP2, r0, r0; \
vpxor RTMP3, r0, r0;
leaq (32*4)(%rdi), %rax;
.align 16
.Lroundloop_blk8:
ROUND(0, RA0, RA1, RA2, RA3, RB0, RB1, RB2, RB3);
ROUND(1, RA1, RA2, RA3, RA0, RB1, RB2, RB3, RB0);
ROUND(2, RA2, RA3, RA0, RA1, RB2, RB3, RB0, RB1);
ROUND(3, RA3, RA0, RA1, RA2, RB3, RB0, RB1, RB2);
leaq (4*4)(%rdi), %rdi;
cmpq %rax, %rdi;
jne .Lroundloop_blk8;
#undef ROUND
vmovdqa .Lbswap128_mask rRIP, RTMP2;
transpose_4x4(RA0, RA1, RA2, RA3, RTMP0, RTMP1);
transpose_4x4(RB0, RB1, RB2, RB3, RTMP0, RTMP1);
vpshufb RTMP2, RA0, RA0;
vpshufb RTMP2, RA1, RA1;
vpshufb RTMP2, RA2, RA2;
vpshufb RTMP2, RA3, RA3;
vpshufb RTMP2, RB0, RB0;
vpshufb RTMP2, RB1, RB1;
vpshufb RTMP2, RB2, RB2;
vpshufb RTMP2, RB3, RB3;
FRAME_END
RET;
SYM_FUNC_END(__sm4_crypt_blk8)
/*
* void sm4_aesni_avx_crypt8(const u32 *rk, u8 *dst,
* const u8 *src, int nblocks)
*/
SYM_FUNC_START(sm4_aesni_avx_crypt8)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (1..8 blocks)
* %rdx: src (1..8 blocks)
* %rcx: num blocks (1..8)
*/
cmpq $5, %rcx;
jb sm4_aesni_avx_crypt4;
FRAME_BEGIN
vmovdqu (0 * 16)(%rdx), RA0;
vmovdqu (1 * 16)(%rdx), RA1;
vmovdqu (2 * 16)(%rdx), RA2;
vmovdqu (3 * 16)(%rdx), RA3;
vmovdqu (4 * 16)(%rdx), RB0;
vmovdqa RB0, RB1;
vmovdqa RB0, RB2;
vmovdqa RB0, RB3;
je .Lblk8_load_input_done;
vmovdqu (5 * 16)(%rdx), RB1;
cmpq $7, %rcx;
jb .Lblk8_load_input_done;
vmovdqu (6 * 16)(%rdx), RB2;
je .Lblk8_load_input_done;
vmovdqu (7 * 16)(%rdx), RB3;
.Lblk8_load_input_done:
call __sm4_crypt_blk8;
cmpq $6, %rcx;
vmovdqu RA0, (0 * 16)(%rsi);
vmovdqu RA1, (1 * 16)(%rsi);
vmovdqu RA2, (2 * 16)(%rsi);
vmovdqu RA3, (3 * 16)(%rsi);
vmovdqu RB0, (4 * 16)(%rsi);
jb .Lblk8_store_output_done;
vmovdqu RB1, (5 * 16)(%rsi);
je .Lblk8_store_output_done;
vmovdqu RB2, (6 * 16)(%rsi);
cmpq $7, %rcx;
je .Lblk8_store_output_done;
vmovdqu RB3, (7 * 16)(%rsi);
.Lblk8_store_output_done:
vzeroall;
FRAME_END
RET;
SYM_FUNC_END(sm4_aesni_avx_crypt8)
/*
* void sm4_aesni_avx_ctr_enc_blk8(const u32 *rk, u8 *dst,
* const u8 *src, u8 *iv)
*/
SYM_TYPED_FUNC_START(sm4_aesni_avx_ctr_enc_blk8)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (8 blocks)
* %rdx: src (8 blocks)
* %rcx: iv (big endian, 128bit)
*/
FRAME_BEGIN
/* load IV and byteswap */
vmovdqu (%rcx), RA0;
vmovdqa .Lbswap128_mask rRIP, RBSWAP;
vpshufb RBSWAP, RA0, RTMP0; /* be => le */
vpcmpeqd RNOT, RNOT, RNOT;
vpsrldq $8, RNOT, RNOT; /* low: -1, high: 0 */
#define inc_le128(x, minus_one, tmp) \
vpcmpeqq minus_one, x, tmp; \
vpsubq minus_one, x, x; \
vpslldq $8, tmp, tmp; \
vpsubq tmp, x, x;
/* construct IVs */
inc_le128(RTMP0, RNOT, RTMP2); /* +1 */
vpshufb RBSWAP, RTMP0, RA1;
inc_le128(RTMP0, RNOT, RTMP2); /* +2 */
vpshufb RBSWAP, RTMP0, RA2;
inc_le128(RTMP0, RNOT, RTMP2); /* +3 */
vpshufb RBSWAP, RTMP0, RA3;
inc_le128(RTMP0, RNOT, RTMP2); /* +4 */
vpshufb RBSWAP, RTMP0, RB0;
inc_le128(RTMP0, RNOT, RTMP2); /* +5 */
vpshufb RBSWAP, RTMP0, RB1;
inc_le128(RTMP0, RNOT, RTMP2); /* +6 */
vpshufb RBSWAP, RTMP0, RB2;
inc_le128(RTMP0, RNOT, RTMP2); /* +7 */
vpshufb RBSWAP, RTMP0, RB3;
inc_le128(RTMP0, RNOT, RTMP2); /* +8 */
vpshufb RBSWAP, RTMP0, RTMP1;
/* store new IV */
vmovdqu RTMP1, (%rcx);
call __sm4_crypt_blk8;
vpxor (0 * 16)(%rdx), RA0, RA0;
vpxor (1 * 16)(%rdx), RA1, RA1;
vpxor (2 * 16)(%rdx), RA2, RA2;
vpxor (3 * 16)(%rdx), RA3, RA3;
vpxor (4 * 16)(%rdx), RB0, RB0;
vpxor (5 * 16)(%rdx), RB1, RB1;
vpxor (6 * 16)(%rdx), RB2, RB2;
vpxor (7 * 16)(%rdx), RB3, RB3;
vmovdqu RA0, (0 * 16)(%rsi);
vmovdqu RA1, (1 * 16)(%rsi);
vmovdqu RA2, (2 * 16)(%rsi);
vmovdqu RA3, (3 * 16)(%rsi);
vmovdqu RB0, (4 * 16)(%rsi);
vmovdqu RB1, (5 * 16)(%rsi);
vmovdqu RB2, (6 * 16)(%rsi);
vmovdqu RB3, (7 * 16)(%rsi);
vzeroall;
FRAME_END
RET;
SYM_FUNC_END(sm4_aesni_avx_ctr_enc_blk8)
/*
* void sm4_aesni_avx_cbc_dec_blk8(const u32 *rk, u8 *dst,
* const u8 *src, u8 *iv)
*/
SYM_TYPED_FUNC_START(sm4_aesni_avx_cbc_dec_blk8)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (8 blocks)
* %rdx: src (8 blocks)
* %rcx: iv
*/
FRAME_BEGIN
vmovdqu (0 * 16)(%rdx), RA0;
vmovdqu (1 * 16)(%rdx), RA1;
vmovdqu (2 * 16)(%rdx), RA2;
vmovdqu (3 * 16)(%rdx), RA3;
vmovdqu (4 * 16)(%rdx), RB0;
vmovdqu (5 * 16)(%rdx), RB1;
vmovdqu (6 * 16)(%rdx), RB2;
vmovdqu (7 * 16)(%rdx), RB3;
call __sm4_crypt_blk8;
vmovdqu (7 * 16)(%rdx), RNOT;
vpxor (%rcx), RA0, RA0;
vpxor (0 * 16)(%rdx), RA1, RA1;
vpxor (1 * 16)(%rdx), RA2, RA2;
vpxor (2 * 16)(%rdx), RA3, RA3;
vpxor (3 * 16)(%rdx), RB0, RB0;
vpxor (4 * 16)(%rdx), RB1, RB1;
vpxor (5 * 16)(%rdx), RB2, RB2;
vpxor (6 * 16)(%rdx), RB3, RB3;
vmovdqu RNOT, (%rcx); /* store new IV */
vmovdqu RA0, (0 * 16)(%rsi);
vmovdqu RA1, (1 * 16)(%rsi);
vmovdqu RA2, (2 * 16)(%rsi);
vmovdqu RA3, (3 * 16)(%rsi);
vmovdqu RB0, (4 * 16)(%rsi);
vmovdqu RB1, (5 * 16)(%rsi);
vmovdqu RB2, (6 * 16)(%rsi);
vmovdqu RB3, (7 * 16)(%rsi);
vzeroall;
FRAME_END
RET;
SYM_FUNC_END(sm4_aesni_avx_cbc_dec_blk8)
/*
* void sm4_aesni_avx_cfb_dec_blk8(const u32 *rk, u8 *dst,
* const u8 *src, u8 *iv)
*/
SYM_TYPED_FUNC_START(sm4_aesni_avx_cfb_dec_blk8)
/* input:
* %rdi: round key array, CTX
* %rsi: dst (8 blocks)
* %rdx: src (8 blocks)
* %rcx: iv
*/
FRAME_BEGIN
/* Load input */
vmovdqu (%rcx), RA0;
vmovdqu 0 * 16(%rdx), RA1;
vmovdqu 1 * 16(%rdx), RA2;
vmovdqu 2 * 16(%rdx), RA3;
vmovdqu 3 * 16(%rdx), RB0;
vmovdqu 4 * 16(%rdx), RB1;
vmovdqu 5 * 16(%rdx), RB2;
vmovdqu 6 * 16(%rdx), RB3;
/* Update IV */
vmovdqu 7 * 16(%rdx), RNOT;
vmovdqu RNOT, (%rcx);
call __sm4_crypt_blk8;
vpxor (0 * 16)(%rdx), RA0, RA0;
vpxor (1 * 16)(%rdx), RA1, RA1;
vpxor (2 * 16)(%rdx), RA2, RA2;
vpxor (3 * 16)(%rdx), RA3, RA3;
vpxor (4 * 16)(%rdx), RB0, RB0;
vpxor (5 * 16)(%rdx), RB1, RB1;
vpxor (6 * 16)(%rdx), RB2, RB2;
vpxor (7 * 16)(%rdx), RB3, RB3;
vmovdqu RA0, (0 * 16)(%rsi);
vmovdqu RA1, (1 * 16)(%rsi);
vmovdqu RA2, (2 * 16)(%rsi);
vmovdqu RA3, (3 * 16)(%rsi);
vmovdqu RB0, (4 * 16)(%rsi);
vmovdqu RB1, (5 * 16)(%rsi);
vmovdqu RB2, (6 * 16)(%rsi);
vmovdqu RB3, (7 * 16)(%rsi);
vzeroall;
FRAME_END
RET;
SYM_FUNC_END(sm4_aesni_avx_cfb_dec_blk8)
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