root/arch/x86/crypto/serpent-sse2-x86_64-asm_64.S
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Serpent Cipher 8-way parallel algorithm (x86_64/SSE2)
 *
 * Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
 *
 * Based on crypto/serpent.c by
 *  Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
 *                2003 Herbert Valerio Riedel <hvr@gnu.org>
 */

#include <linux/linkage.h>

.file "serpent-sse2-x86_64-asm_64.S"
.text

#define CTX %rdi

/**********************************************************************
  8-way SSE2 serpent
 **********************************************************************/
#define RA1 %xmm0
#define RB1 %xmm1
#define RC1 %xmm2
#define RD1 %xmm3
#define RE1 %xmm4

#define RA2 %xmm5
#define RB2 %xmm6
#define RC2 %xmm7
#define RD2 %xmm8
#define RE2 %xmm9

#define RNOT %xmm10

#define RK0 %xmm11
#define RK1 %xmm12
#define RK2 %xmm13
#define RK3 %xmm14

#define S0_1(x0, x1, x2, x3, x4) \
        movdqa x3,              x4; \
        por x0,                 x3; \
        pxor x4,                x0; \
        pxor x2,                x4; \
        pxor RNOT,              x4; \
        pxor x1,                x3; \
        pand x0,                x1; \
        pxor x4,                x1; \
        pxor x0,                x2;
#define S0_2(x0, x1, x2, x3, x4) \
        pxor x3,                x0; \
        por x0,                 x4; \
        pxor x2,                x0; \
        pand x1,                x2; \
        pxor x2,                x3; \
        pxor RNOT,              x1; \
        pxor x4,                x2; \
        pxor x2,                x1;

#define S1_1(x0, x1, x2, x3, x4) \
        movdqa x1,              x4; \
        pxor x0,                x1; \
        pxor x3,                x0; \
        pxor RNOT,              x3; \
        pand x1,                x4; \
        por x1,                 x0; \
        pxor x2,                x3; \
        pxor x3,                x0; \
        pxor x3,                x1;
#define S1_2(x0, x1, x2, x3, x4) \
        pxor x4,                x3; \
        por x4,                 x1; \
        pxor x2,                x4; \
        pand x0,                x2; \
        pxor x1,                x2; \
        por x0,                 x1; \
        pxor RNOT,              x0; \
        pxor x2,                x0; \
        pxor x1,                x4;

#define S2_1(x0, x1, x2, x3, x4) \
        pxor RNOT,              x3; \
        pxor x0,                x1; \
        movdqa x0,              x4; \
        pand x2,                x0; \
        pxor x3,                x0; \
        por x4,                 x3; \
        pxor x1,                x2; \
        pxor x1,                x3; \
        pand x0,                x1;
#define S2_2(x0, x1, x2, x3, x4) \
        pxor x2,                x0; \
        pand x3,                x2; \
        por x1,                 x3; \
        pxor RNOT,              x0; \
        pxor x0,                x3; \
        pxor x0,                x4; \
        pxor x2,                x0; \
        por x2,                 x1;

#define S3_1(x0, x1, x2, x3, x4) \
        movdqa x1,              x4; \
        pxor x3,                x1; \
        por x0,                 x3; \
        pand x0,                x4; \
        pxor x2,                x0; \
        pxor x1,                x2; \
        pand x3,                x1; \
        pxor x3,                x2; \
        por x4,                 x0; \
        pxor x3,                x4;
#define S3_2(x0, x1, x2, x3, x4) \
        pxor x0,                x1; \
        pand x3,                x0; \
        pand x4,                x3; \
        pxor x2,                x3; \
        por x1,                 x4; \
        pand x1,                x2; \
        pxor x3,                x4; \
        pxor x3,                x0; \
        pxor x2,                x3;

#define S4_1(x0, x1, x2, x3, x4) \
        movdqa x3,              x4; \
        pand x0,                x3; \
        pxor x4,                x0; \
        pxor x2,                x3; \
        por x4,                 x2; \
        pxor x1,                x0; \
        pxor x3,                x4; \
        por x0,                 x2; \
        pxor x1,                x2;
#define S4_2(x0, x1, x2, x3, x4) \
        pand x0,                x1; \
        pxor x4,                x1; \
        pand x2,                x4; \
        pxor x3,                x2; \
        pxor x0,                x4; \
        por x1,                 x3; \
        pxor RNOT,              x1; \
        pxor x0,                x3;

#define S5_1(x0, x1, x2, x3, x4) \
        movdqa x1,              x4; \
        por x0,                 x1; \
        pxor x1,                x2; \
        pxor RNOT,              x3; \
        pxor x0,                x4; \
        pxor x2,                x0; \
        pand x4,                x1; \
        por x3,                 x4; \
        pxor x0,                x4;
#define S5_2(x0, x1, x2, x3, x4) \
        pand x3,                x0; \
        pxor x3,                x1; \
        pxor x2,                x3; \
        pxor x1,                x0; \
        pand x4,                x2; \
        pxor x2,                x1; \
        pand x0,                x2; \
        pxor x2,                x3;

#define S6_1(x0, x1, x2, x3, x4) \
        movdqa x1,              x4; \
        pxor x0,                x3; \
        pxor x2,                x1; \
        pxor x0,                x2; \
        pand x3,                x0; \
        por x3,                 x1; \
        pxor RNOT,              x4; \
        pxor x1,                x0; \
        pxor x2,                x1;
#define S6_2(x0, x1, x2, x3, x4) \
        pxor x4,                x3; \
        pxor x0,                x4; \
        pand x0,                x2; \
        pxor x1,                x4; \
        pxor x3,                x2; \
        pand x1,                x3; \
        pxor x0,                x3; \
        pxor x2,                x1;

#define S7_1(x0, x1, x2, x3, x4) \
        pxor RNOT,              x1; \
        movdqa x1,              x4; \
        pxor RNOT,              x0; \
        pand x2,                x1; \
        pxor x3,                x1; \
        por x4,                 x3; \
        pxor x2,                x4; \
        pxor x3,                x2; \
        pxor x0,                x3; \
        por x1,                 x0;
#define S7_2(x0, x1, x2, x3, x4) \
        pand x0,                x2; \
        pxor x4,                x0; \
        pxor x3,                x4; \
        pand x0,                x3; \
        pxor x1,                x4; \
        pxor x4,                x2; \
        pxor x1,                x3; \
        por x0,                 x4; \
        pxor x1,                x4;

#define SI0_1(x0, x1, x2, x3, x4) \
        movdqa x3,              x4; \
        pxor x0,                x1; \
        por x1,                 x3; \
        pxor x1,                x4; \
        pxor RNOT,              x0; \
        pxor x3,                x2; \
        pxor x0,                x3; \
        pand x1,                x0; \
        pxor x2,                x0;
#define SI0_2(x0, x1, x2, x3, x4) \
        pand x3,                x2; \
        pxor x4,                x3; \
        pxor x3,                x2; \
        pxor x3,                x1; \
        pand x0,                x3; \
        pxor x0,                x1; \
        pxor x2,                x0; \
        pxor x3,                x4;

#define SI1_1(x0, x1, x2, x3, x4) \
        pxor x3,                x1; \
        movdqa x0,              x4; \
        pxor x2,                x0; \
        pxor RNOT,              x2; \
        por x1,                 x4; \
        pxor x3,                x4; \
        pand x1,                x3; \
        pxor x2,                x1; \
        pand x4,                x2;
#define SI1_2(x0, x1, x2, x3, x4) \
        pxor x1,                x4; \
        por x3,                 x1; \
        pxor x0,                x3; \
        pxor x0,                x2; \
        por x4,                 x0; \
        pxor x4,                x2; \
        pxor x0,                x1; \
        pxor x1,                x4;

#define SI2_1(x0, x1, x2, x3, x4) \
        pxor x1,                x2; \
        movdqa x3,              x4; \
        pxor RNOT,              x3; \
        por x2,                 x3; \
        pxor x4,                x2; \
        pxor x0,                x4; \
        pxor x1,                x3; \
        por x2,                 x1; \
        pxor x0,                x2;
#define SI2_2(x0, x1, x2, x3, x4) \
        pxor x4,                x1; \
        por x3,                 x4; \
        pxor x3,                x2; \
        pxor x2,                x4; \
        pand x1,                x2; \
        pxor x3,                x2; \
        pxor x4,                x3; \
        pxor x0,                x4;

#define SI3_1(x0, x1, x2, x3, x4) \
        pxor x1,                x2; \
        movdqa x1,              x4; \
        pand x2,                x1; \
        pxor x0,                x1; \
        por x4,                 x0; \
        pxor x3,                x4; \
        pxor x3,                x0; \
        por x1,                 x3; \
        pxor x2,                x1;
#define SI3_2(x0, x1, x2, x3, x4) \
        pxor x3,                x1; \
        pxor x2,                x0; \
        pxor x3,                x2; \
        pand x1,                x3; \
        pxor x0,                x1; \
        pand x2,                x0; \
        pxor x3,                x4; \
        pxor x0,                x3; \
        pxor x1,                x0;

#define SI4_1(x0, x1, x2, x3, x4) \
        pxor x3,                x2; \
        movdqa x0,              x4; \
        pand x1,                x0; \
        pxor x2,                x0; \
        por x3,                 x2; \
        pxor RNOT,              x4; \
        pxor x0,                x1; \
        pxor x2,                x0; \
        pand x4,                x2;
#define SI4_2(x0, x1, x2, x3, x4) \
        pxor x0,                x2; \
        por x4,                 x0; \
        pxor x3,                x0; \
        pand x2,                x3; \
        pxor x3,                x4; \
        pxor x1,                x3; \
        pand x0,                x1; \
        pxor x1,                x4; \
        pxor x3,                x0;

#define SI5_1(x0, x1, x2, x3, x4) \
        movdqa x1,              x4; \
        por x2,                 x1; \
        pxor x4,                x2; \
        pxor x3,                x1; \
        pand x4,                x3; \
        pxor x3,                x2; \
        por x0,                 x3; \
        pxor RNOT,              x0; \
        pxor x2,                x3; \
        por x0,                 x2;
#define SI5_2(x0, x1, x2, x3, x4) \
        pxor x1,                x4; \
        pxor x4,                x2; \
        pand x0,                x4; \
        pxor x1,                x0; \
        pxor x3,                x1; \
        pand x2,                x0; \
        pxor x3,                x2; \
        pxor x2,                x0; \
        pxor x4,                x2; \
        pxor x3,                x4;

#define SI6_1(x0, x1, x2, x3, x4) \
        pxor x2,                x0; \
        movdqa x0,              x4; \
        pand x3,                x0; \
        pxor x3,                x2; \
        pxor x2,                x0; \
        pxor x1,                x3; \
        por x4,                 x2; \
        pxor x3,                x2; \
        pand x0,                x3;
#define SI6_2(x0, x1, x2, x3, x4) \
        pxor RNOT,              x0; \
        pxor x1,                x3; \
        pand x2,                x1; \
        pxor x0,                x4; \
        pxor x4,                x3; \
        pxor x2,                x4; \
        pxor x1,                x0; \
        pxor x0,                x2;

#define SI7_1(x0, x1, x2, x3, x4) \
        movdqa x3,              x4; \
        pand x0,                x3; \
        pxor x2,                x0; \
        por x4,                 x2; \
        pxor x1,                x4; \
        pxor RNOT,              x0; \
        por x3,                 x1; \
        pxor x0,                x4; \
        pand x2,                x0; \
        pxor x1,                x0;
#define SI7_2(x0, x1, x2, x3, x4) \
        pand x2,                x1; \
        pxor x2,                x3; \
        pxor x3,                x4; \
        pand x3,                x2; \
        por x0,                 x3; \
        pxor x4,                x1; \
        pxor x4,                x3; \
        pand x0,                x4; \
        pxor x2,                x4;

#define get_key(i, j, t) \
        movd (4*(i)+(j))*4(CTX), t; \
        pshufd $0, t, t;

#define K2(x0, x1, x2, x3, x4, i) \
        get_key(i, 0, RK0); \
        get_key(i, 1, RK1); \
        get_key(i, 2, RK2); \
        get_key(i, 3, RK3); \
        pxor RK0,               x0 ## 1; \
        pxor RK1,               x1 ## 1; \
        pxor RK2,               x2 ## 1; \
        pxor RK3,               x3 ## 1; \
                pxor RK0,               x0 ## 2; \
                pxor RK1,               x1 ## 2; \
                pxor RK2,               x2 ## 2; \
                pxor RK3,               x3 ## 2;

#define LK2(x0, x1, x2, x3, x4, i) \
        movdqa x0 ## 1,         x4 ## 1; \
        pslld $13,              x0 ## 1; \
        psrld $(32 - 13),       x4 ## 1; \
        por x4 ## 1,            x0 ## 1; \
        pxor x0 ## 1,           x1 ## 1; \
        movdqa x2 ## 1,         x4 ## 1; \
        pslld $3,               x2 ## 1; \
        psrld $(32 - 3),        x4 ## 1; \
        por x4 ## 1,            x2 ## 1; \
        pxor x2 ## 1,           x1 ## 1; \
                movdqa x0 ## 2,         x4 ## 2; \
                pslld $13,              x0 ## 2; \
                psrld $(32 - 13),       x4 ## 2; \
                por x4 ## 2,            x0 ## 2; \
                pxor x0 ## 2,           x1 ## 2; \
                movdqa x2 ## 2,         x4 ## 2; \
                pslld $3,               x2 ## 2; \
                psrld $(32 - 3),        x4 ## 2; \
                por x4 ## 2,            x2 ## 2; \
                pxor x2 ## 2,           x1 ## 2; \
        movdqa x1 ## 1,         x4 ## 1; \
        pslld $1,               x1 ## 1; \
        psrld $(32 - 1),        x4 ## 1; \
        por x4 ## 1,            x1 ## 1; \
        movdqa x0 ## 1,         x4 ## 1; \
        pslld $3,               x4 ## 1; \
        pxor x2 ## 1,           x3 ## 1; \
        pxor x4 ## 1,           x3 ## 1; \
        movdqa x3 ## 1,         x4 ## 1; \
        get_key(i, 1, RK1); \
                movdqa x1 ## 2,         x4 ## 2; \
                pslld $1,               x1 ## 2; \
                psrld $(32 - 1),        x4 ## 2; \
                por x4 ## 2,            x1 ## 2; \
                movdqa x0 ## 2,         x4 ## 2; \
                pslld $3,               x4 ## 2; \
                pxor x2 ## 2,           x3 ## 2; \
                pxor x4 ## 2,           x3 ## 2; \
                movdqa x3 ## 2,         x4 ## 2; \
                get_key(i, 3, RK3); \
        pslld $7,               x3 ## 1; \
        psrld $(32 - 7),        x4 ## 1; \
        por x4 ## 1,            x3 ## 1; \
        movdqa x1 ## 1,         x4 ## 1; \
        pslld $7,               x4 ## 1; \
        pxor x1 ## 1,           x0 ## 1; \
        pxor x3 ## 1,           x0 ## 1; \
        pxor x3 ## 1,           x2 ## 1; \
        pxor x4 ## 1,           x2 ## 1; \
        get_key(i, 0, RK0); \
                pslld $7,               x3 ## 2; \
                psrld $(32 - 7),        x4 ## 2; \
                por x4 ## 2,            x3 ## 2; \
                movdqa x1 ## 2,         x4 ## 2; \
                pslld $7,               x4 ## 2; \
                pxor x1 ## 2,           x0 ## 2; \
                pxor x3 ## 2,           x0 ## 2; \
                pxor x3 ## 2,           x2 ## 2; \
                pxor x4 ## 2,           x2 ## 2; \
                get_key(i, 2, RK2); \
        pxor RK1,               x1 ## 1; \
        pxor RK3,               x3 ## 1; \
        movdqa x0 ## 1,         x4 ## 1; \
        pslld $5,               x0 ## 1; \
        psrld $(32 - 5),        x4 ## 1; \
        por x4 ## 1,            x0 ## 1; \
        movdqa x2 ## 1,         x4 ## 1; \
        pslld $22,              x2 ## 1; \
        psrld $(32 - 22),       x4 ## 1; \
        por x4 ## 1,            x2 ## 1; \
        pxor RK0,               x0 ## 1; \
        pxor RK2,               x2 ## 1; \
                pxor RK1,               x1 ## 2; \
                pxor RK3,               x3 ## 2; \
                movdqa x0 ## 2,         x4 ## 2; \
                pslld $5,               x0 ## 2; \
                psrld $(32 - 5),        x4 ## 2; \
                por x4 ## 2,            x0 ## 2; \
                movdqa x2 ## 2,         x4 ## 2; \
                pslld $22,              x2 ## 2; \
                psrld $(32 - 22),       x4 ## 2; \
                por x4 ## 2,            x2 ## 2; \
                pxor RK0,               x0 ## 2; \
                pxor RK2,               x2 ## 2;

#define KL2(x0, x1, x2, x3, x4, i) \
        pxor RK0,               x0 ## 1; \
        pxor RK2,               x2 ## 1; \
        movdqa x0 ## 1,         x4 ## 1; \
        psrld $5,               x0 ## 1; \
        pslld $(32 - 5),        x4 ## 1; \
        por x4 ## 1,            x0 ## 1; \
        pxor RK3,               x3 ## 1; \
        pxor RK1,               x1 ## 1; \
        movdqa x2 ## 1,         x4 ## 1; \
        psrld $22,              x2 ## 1; \
        pslld $(32 - 22),       x4 ## 1; \
        por x4 ## 1,            x2 ## 1; \
        pxor x3 ## 1,           x2 ## 1; \
                pxor RK0,               x0 ## 2; \
                pxor RK2,               x2 ## 2; \
                movdqa x0 ## 2,         x4 ## 2; \
                psrld $5,               x0 ## 2; \
                pslld $(32 - 5),        x4 ## 2; \
                por x4 ## 2,            x0 ## 2; \
                pxor RK3,               x3 ## 2; \
                pxor RK1,               x1 ## 2; \
                movdqa x2 ## 2,         x4 ## 2; \
                psrld $22,              x2 ## 2; \
                pslld $(32 - 22),       x4 ## 2; \
                por x4 ## 2,            x2 ## 2; \
                pxor x3 ## 2,           x2 ## 2; \
        pxor x3 ## 1,           x0 ## 1; \
        movdqa x1 ## 1,         x4 ## 1; \
        pslld $7,               x4 ## 1; \
        pxor x1 ## 1,           x0 ## 1; \
        pxor x4 ## 1,           x2 ## 1; \
        movdqa x1 ## 1,         x4 ## 1; \
        psrld $1,               x1 ## 1; \
        pslld $(32 - 1),        x4 ## 1; \
        por x4 ## 1,            x1 ## 1; \
                pxor x3 ## 2,           x0 ## 2; \
                movdqa x1 ## 2,         x4 ## 2; \
                pslld $7,               x4 ## 2; \
                pxor x1 ## 2,           x0 ## 2; \
                pxor x4 ## 2,           x2 ## 2; \
                movdqa x1 ## 2,         x4 ## 2; \
                psrld $1,               x1 ## 2; \
                pslld $(32 - 1),        x4 ## 2; \
                por x4 ## 2,            x1 ## 2; \
        movdqa x3 ## 1,         x4 ## 1; \
        psrld $7,               x3 ## 1; \
        pslld $(32 - 7),        x4 ## 1; \
        por x4 ## 1,            x3 ## 1; \
        pxor x0 ## 1,           x1 ## 1; \
        movdqa x0 ## 1,         x4 ## 1; \
        pslld $3,               x4 ## 1; \
        pxor x4 ## 1,           x3 ## 1; \
        movdqa x0 ## 1,         x4 ## 1; \
                movdqa x3 ## 2,         x4 ## 2; \
                psrld $7,               x3 ## 2; \
                pslld $(32 - 7),        x4 ## 2; \
                por x4 ## 2,            x3 ## 2; \
                pxor x0 ## 2,           x1 ## 2; \
                movdqa x0 ## 2,         x4 ## 2; \
                pslld $3,               x4 ## 2; \
                pxor x4 ## 2,           x3 ## 2; \
                movdqa x0 ## 2,         x4 ## 2; \
        psrld $13,              x0 ## 1; \
        pslld $(32 - 13),       x4 ## 1; \
        por x4 ## 1,            x0 ## 1; \
        pxor x2 ## 1,           x1 ## 1; \
        pxor x2 ## 1,           x3 ## 1; \
        movdqa x2 ## 1,         x4 ## 1; \
        psrld $3,               x2 ## 1; \
        pslld $(32 - 3),        x4 ## 1; \
        por x4 ## 1,            x2 ## 1; \
                psrld $13,              x0 ## 2; \
                pslld $(32 - 13),       x4 ## 2; \
                por x4 ## 2,            x0 ## 2; \
                pxor x2 ## 2,           x1 ## 2; \
                pxor x2 ## 2,           x3 ## 2; \
                movdqa x2 ## 2,         x4 ## 2; \
                psrld $3,               x2 ## 2; \
                pslld $(32 - 3),        x4 ## 2; \
                por x4 ## 2,            x2 ## 2;

#define S(SBOX, x0, x1, x2, x3, x4) \
        SBOX ## _1(x0 ## 1, x1 ## 1, x2 ## 1, x3 ## 1, x4 ## 1); \
        SBOX ## _2(x0 ## 1, x1 ## 1, x2 ## 1, x3 ## 1, x4 ## 1); \
        SBOX ## _1(x0 ## 2, x1 ## 2, x2 ## 2, x3 ## 2, x4 ## 2); \
        SBOX ## _2(x0 ## 2, x1 ## 2, x2 ## 2, x3 ## 2, x4 ## 2);

#define SP(SBOX, x0, x1, x2, x3, x4, i) \
        get_key(i, 0, RK0); \
        SBOX ## _1(x0 ## 1, x1 ## 1, x2 ## 1, x3 ## 1, x4 ## 1); \
        get_key(i, 2, RK2); \
        SBOX ## _1(x0 ## 2, x1 ## 2, x2 ## 2, x3 ## 2, x4 ## 2); \
        get_key(i, 3, RK3); \
        SBOX ## _2(x0 ## 1, x1 ## 1, x2 ## 1, x3 ## 1, x4 ## 1); \
        get_key(i, 1, RK1); \
        SBOX ## _2(x0 ## 2, x1 ## 2, x2 ## 2, x3 ## 2, x4 ## 2); \

#define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
        movdqa x0,              t2; \
        punpckldq x1,           x0; \
        punpckhdq x1,           t2; \
        movdqa x2,              t1; \
        punpckhdq x3,           x2; \
        punpckldq x3,           t1; \
        movdqa x0,              x1; \
        punpcklqdq t1,          x0; \
        punpckhqdq t1,          x1; \
        movdqa t2,              x3; \
        punpcklqdq x2,          t2; \
        punpckhqdq x2,          x3; \
        movdqa t2,              x2;

#define read_blocks(in, x0, x1, x2, x3, t0, t1, t2) \
        movdqu (0*4*4)(in),     x0; \
        movdqu (1*4*4)(in),     x1; \
        movdqu (2*4*4)(in),     x2; \
        movdqu (3*4*4)(in),     x3; \
        \
        transpose_4x4(x0, x1, x2, x3, t0, t1, t2)

#define write_blocks(out, x0, x1, x2, x3, t0, t1, t2) \
        transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
        \
        movdqu x0,              (0*4*4)(out); \
        movdqu x1,              (1*4*4)(out); \
        movdqu x2,              (2*4*4)(out); \
        movdqu x3,              (3*4*4)(out);

#define xor_blocks(out, x0, x1, x2, x3, t0, t1, t2) \
        transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
        \
        movdqu (0*4*4)(out),    t0; \
        pxor t0,                x0; \
        movdqu x0,              (0*4*4)(out); \
        movdqu (1*4*4)(out),    t0; \
        pxor t0,                x1; \
        movdqu x1,              (1*4*4)(out); \
        movdqu (2*4*4)(out),    t0; \
        pxor t0,                x2; \
        movdqu x2,              (2*4*4)(out); \
        movdqu (3*4*4)(out),    t0; \
        pxor t0,                x3; \
        movdqu x3,              (3*4*4)(out);

SYM_FUNC_START(__serpent_enc_blk_8way)
        /* input:
         *      %rdi: ctx, CTX
         *      %rsi: dst
         *      %rdx: src
         *      %rcx: bool, if true: xor output
         */

        pcmpeqd RNOT, RNOT;

        leaq (4*4*4)(%rdx), %rax;
        read_blocks(%rdx, RA1, RB1, RC1, RD1, RK0, RK1, RK2);
        read_blocks(%rax, RA2, RB2, RC2, RD2, RK0, RK1, RK2);

                                                 K2(RA, RB, RC, RD, RE, 0);
        S(S0, RA, RB, RC, RD, RE);              LK2(RC, RB, RD, RA, RE, 1);
        S(S1, RC, RB, RD, RA, RE);              LK2(RE, RD, RA, RC, RB, 2);
        S(S2, RE, RD, RA, RC, RB);              LK2(RB, RD, RE, RC, RA, 3);
        S(S3, RB, RD, RE, RC, RA);              LK2(RC, RA, RD, RB, RE, 4);
        S(S4, RC, RA, RD, RB, RE);              LK2(RA, RD, RB, RE, RC, 5);
        S(S5, RA, RD, RB, RE, RC);              LK2(RC, RA, RD, RE, RB, 6);
        S(S6, RC, RA, RD, RE, RB);              LK2(RD, RB, RA, RE, RC, 7);
        S(S7, RD, RB, RA, RE, RC);              LK2(RC, RA, RE, RD, RB, 8);
        S(S0, RC, RA, RE, RD, RB);              LK2(RE, RA, RD, RC, RB, 9);
        S(S1, RE, RA, RD, RC, RB);              LK2(RB, RD, RC, RE, RA, 10);
        S(S2, RB, RD, RC, RE, RA);              LK2(RA, RD, RB, RE, RC, 11);
        S(S3, RA, RD, RB, RE, RC);              LK2(RE, RC, RD, RA, RB, 12);
        S(S4, RE, RC, RD, RA, RB);              LK2(RC, RD, RA, RB, RE, 13);
        S(S5, RC, RD, RA, RB, RE);              LK2(RE, RC, RD, RB, RA, 14);
        S(S6, RE, RC, RD, RB, RA);              LK2(RD, RA, RC, RB, RE, 15);
        S(S7, RD, RA, RC, RB, RE);              LK2(RE, RC, RB, RD, RA, 16);
        S(S0, RE, RC, RB, RD, RA);              LK2(RB, RC, RD, RE, RA, 17);
        S(S1, RB, RC, RD, RE, RA);              LK2(RA, RD, RE, RB, RC, 18);
        S(S2, RA, RD, RE, RB, RC);              LK2(RC, RD, RA, RB, RE, 19);
        S(S3, RC, RD, RA, RB, RE);              LK2(RB, RE, RD, RC, RA, 20);
        S(S4, RB, RE, RD, RC, RA);              LK2(RE, RD, RC, RA, RB, 21);
        S(S5, RE, RD, RC, RA, RB);              LK2(RB, RE, RD, RA, RC, 22);
        S(S6, RB, RE, RD, RA, RC);              LK2(RD, RC, RE, RA, RB, 23);
        S(S7, RD, RC, RE, RA, RB);              LK2(RB, RE, RA, RD, RC, 24);
        S(S0, RB, RE, RA, RD, RC);              LK2(RA, RE, RD, RB, RC, 25);
        S(S1, RA, RE, RD, RB, RC);              LK2(RC, RD, RB, RA, RE, 26);
        S(S2, RC, RD, RB, RA, RE);              LK2(RE, RD, RC, RA, RB, 27);
        S(S3, RE, RD, RC, RA, RB);              LK2(RA, RB, RD, RE, RC, 28);
        S(S4, RA, RB, RD, RE, RC);              LK2(RB, RD, RE, RC, RA, 29);
        S(S5, RB, RD, RE, RC, RA);              LK2(RA, RB, RD, RC, RE, 30);
        S(S6, RA, RB, RD, RC, RE);              LK2(RD, RE, RB, RC, RA, 31);
        S(S7, RD, RE, RB, RC, RA);               K2(RA, RB, RC, RD, RE, 32);

        leaq (4*4*4)(%rsi), %rax;

        testb %cl, %cl;
        jnz .L__enc_xor8;

        write_blocks(%rsi, RA1, RB1, RC1, RD1, RK0, RK1, RK2);
        write_blocks(%rax, RA2, RB2, RC2, RD2, RK0, RK1, RK2);

        RET;

.L__enc_xor8:
        xor_blocks(%rsi, RA1, RB1, RC1, RD1, RK0, RK1, RK2);
        xor_blocks(%rax, RA2, RB2, RC2, RD2, RK0, RK1, RK2);

        RET;
SYM_FUNC_END(__serpent_enc_blk_8way)

SYM_FUNC_START(serpent_dec_blk_8way)
        /* input:
         *      %rdi: ctx, CTX
         *      %rsi: dst
         *      %rdx: src
         */

        pcmpeqd RNOT, RNOT;

        leaq (4*4*4)(%rdx), %rax;
        read_blocks(%rdx, RA1, RB1, RC1, RD1, RK0, RK1, RK2);
        read_blocks(%rax, RA2, RB2, RC2, RD2, RK0, RK1, RK2);

                                                 K2(RA, RB, RC, RD, RE, 32);
        SP(SI7, RA, RB, RC, RD, RE, 31);        KL2(RB, RD, RA, RE, RC, 31);
        SP(SI6, RB, RD, RA, RE, RC, 30);        KL2(RA, RC, RE, RB, RD, 30);
        SP(SI5, RA, RC, RE, RB, RD, 29);        KL2(RC, RD, RA, RE, RB, 29);
        SP(SI4, RC, RD, RA, RE, RB, 28);        KL2(RC, RA, RB, RE, RD, 28);
        SP(SI3, RC, RA, RB, RE, RD, 27);        KL2(RB, RC, RD, RE, RA, 27);
        SP(SI2, RB, RC, RD, RE, RA, 26);        KL2(RC, RA, RE, RD, RB, 26);
        SP(SI1, RC, RA, RE, RD, RB, 25);        KL2(RB, RA, RE, RD, RC, 25);
        SP(SI0, RB, RA, RE, RD, RC, 24);        KL2(RE, RC, RA, RB, RD, 24);
        SP(SI7, RE, RC, RA, RB, RD, 23);        KL2(RC, RB, RE, RD, RA, 23);
        SP(SI6, RC, RB, RE, RD, RA, 22);        KL2(RE, RA, RD, RC, RB, 22);
        SP(SI5, RE, RA, RD, RC, RB, 21);        KL2(RA, RB, RE, RD, RC, 21);
        SP(SI4, RA, RB, RE, RD, RC, 20);        KL2(RA, RE, RC, RD, RB, 20);
        SP(SI3, RA, RE, RC, RD, RB, 19);        KL2(RC, RA, RB, RD, RE, 19);
        SP(SI2, RC, RA, RB, RD, RE, 18);        KL2(RA, RE, RD, RB, RC, 18);
        SP(SI1, RA, RE, RD, RB, RC, 17);        KL2(RC, RE, RD, RB, RA, 17);
        SP(SI0, RC, RE, RD, RB, RA, 16);        KL2(RD, RA, RE, RC, RB, 16);
        SP(SI7, RD, RA, RE, RC, RB, 15);        KL2(RA, RC, RD, RB, RE, 15);
        SP(SI6, RA, RC, RD, RB, RE, 14);        KL2(RD, RE, RB, RA, RC, 14);
        SP(SI5, RD, RE, RB, RA, RC, 13);        KL2(RE, RC, RD, RB, RA, 13);
        SP(SI4, RE, RC, RD, RB, RA, 12);        KL2(RE, RD, RA, RB, RC, 12);
        SP(SI3, RE, RD, RA, RB, RC, 11);        KL2(RA, RE, RC, RB, RD, 11);
        SP(SI2, RA, RE, RC, RB, RD, 10);        KL2(RE, RD, RB, RC, RA, 10);
        SP(SI1, RE, RD, RB, RC, RA, 9);         KL2(RA, RD, RB, RC, RE, 9);
        SP(SI0, RA, RD, RB, RC, RE, 8);         KL2(RB, RE, RD, RA, RC, 8);
        SP(SI7, RB, RE, RD, RA, RC, 7);         KL2(RE, RA, RB, RC, RD, 7);
        SP(SI6, RE, RA, RB, RC, RD, 6);         KL2(RB, RD, RC, RE, RA, 6);
        SP(SI5, RB, RD, RC, RE, RA, 5);         KL2(RD, RA, RB, RC, RE, 5);
        SP(SI4, RD, RA, RB, RC, RE, 4);         KL2(RD, RB, RE, RC, RA, 4);
        SP(SI3, RD, RB, RE, RC, RA, 3);         KL2(RE, RD, RA, RC, RB, 3);
        SP(SI2, RE, RD, RA, RC, RB, 2);         KL2(RD, RB, RC, RA, RE, 2);
        SP(SI1, RD, RB, RC, RA, RE, 1);         KL2(RE, RB, RC, RA, RD, 1);
        S(SI0, RE, RB, RC, RA, RD);              K2(RC, RD, RB, RE, RA, 0);

        leaq (4*4*4)(%rsi), %rax;
        write_blocks(%rsi, RC1, RD1, RB1, RE1, RK0, RK1, RK2);
        write_blocks(%rax, RC2, RD2, RB2, RE2, RK0, RK1, RK2);

        RET;
SYM_FUNC_END(serpent_dec_blk_8way)