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linux/arch/x86/crypto/twofish-avx-x86_64-asm_64.S
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program 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 general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Twofish Cipher 8-way parallel algorithm (AVX/x86_64)
*
* Copyright (C) 2012 Johannes Goetzfried
* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
*
* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
*/
#include <linux/linkage.h>
#include <asm/frame.h>
#include "glue_helper-asm-avx.S"
.file "twofish-avx-x86_64-asm_64.S"
.section .rodata.cst16.bswap128_mask, "aM", @progbits, 16
.align 16
.Lbswap128_mask:
.byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
.section .rodata.cst16.xts_gf128mul_and_shl1_mask, "aM", @progbits, 16
.align 16
.Lxts_gf128mul_and_shl1_mask:
.byte 0x87, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0
.text
/* structure of crypto context */
#define s0 0
#define s1 1024
#define s2 2048
#define s3 3072
#define w 4096
#define k 4128
/**********************************************************************
8-way AVX twofish
**********************************************************************/
#define CTX %rdi
#define RA1 %xmm0
#define RB1 %xmm1
#define RC1 %xmm2
#define RD1 %xmm3
#define RA2 %xmm4
#define RB2 %xmm5
#define RC2 %xmm6
#define RD2 %xmm7
#define RX0 %xmm8
#define RY0 %xmm9
#define RX1 %xmm10
#define RY1 %xmm11
#define RK1 %xmm12
#define RK2 %xmm13
#define RT %xmm14
#define RR %xmm15
#define RID1 %r13
#define RID1d %r13d
#define RID2 %rsi
#define RID2d %esi
#define RGI1 %rdx
#define RGI1bl %dl
#define RGI1bh %dh
#define RGI2 %rcx
#define RGI2bl %cl
#define RGI2bh %ch
#define RGI3 %rax
#define RGI3bl %al
#define RGI3bh %ah
#define RGI4 %rbx
#define RGI4bl %bl
#define RGI4bh %bh
#define RGS1 %r8
#define RGS1d %r8d
#define RGS2 %r9
#define RGS2d %r9d
#define RGS3 %r10
#define RGS3d %r10d
#define lookup_32bit(t0, t1, t2, t3, src, dst, interleave_op, il_reg) \
movzbl src ## bl, RID1d; \
movzbl src ## bh, RID2d; \
shrq $16, src; \
movl t0(CTX, RID1, 4), dst ## d; \
movl t1(CTX, RID2, 4), RID2d; \
movzbl src ## bl, RID1d; \
xorl RID2d, dst ## d; \
movzbl src ## bh, RID2d; \
interleave_op(il_reg); \
xorl t2(CTX, RID1, 4), dst ## d; \
xorl t3(CTX, RID2, 4), dst ## d;
#define dummy(d) /* do nothing */
#define shr_next(reg) \
shrq $16, reg;
#define G(gi1, gi2, x, t0, t1, t2, t3) \
lookup_32bit(t0, t1, t2, t3, ##gi1, RGS1, shr_next, ##gi1); \
lookup_32bit(t0, t1, t2, t3, ##gi2, RGS3, shr_next, ##gi2); \
\
lookup_32bit(t0, t1, t2, t3, ##gi1, RGS2, dummy, none); \
shlq $32, RGS2; \
orq RGS1, RGS2; \
lookup_32bit(t0, t1, t2, t3, ##gi2, RGS1, dummy, none); \
shlq $32, RGS1; \
orq RGS1, RGS3;
#define round_head_2(a, b, x1, y1, x2, y2) \
vmovq b ## 1, RGI3; \
vpextrq $1, b ## 1, RGI4; \
\
G(RGI1, RGI2, x1, s0, s1, s2, s3); \
vmovq a ## 2, RGI1; \
vpextrq $1, a ## 2, RGI2; \
vmovq RGS2, x1; \
vpinsrq $1, RGS3, x1, x1; \
\
G(RGI3, RGI4, y1, s1, s2, s3, s0); \
vmovq b ## 2, RGI3; \
vpextrq $1, b ## 2, RGI4; \
vmovq RGS2, y1; \
vpinsrq $1, RGS3, y1, y1; \
\
G(RGI1, RGI2, x2, s0, s1, s2, s3); \
vmovq RGS2, x2; \
vpinsrq $1, RGS3, x2, x2; \
\
G(RGI3, RGI4, y2, s1, s2, s3, s0); \
vmovq RGS2, y2; \
vpinsrq $1, RGS3, y2, y2;
#define encround_tail(a, b, c, d, x, y, prerotate) \
vpaddd x, y, x; \
vpaddd x, RK1, RT;\
prerotate(b); \
vpxor RT, c, c; \
vpaddd y, x, y; \
vpaddd y, RK2, y; \
vpsrld $1, c, RT; \
vpslld $(32 - 1), c, c; \
vpor c, RT, c; \
vpxor d, y, d; \
#define decround_tail(a, b, c, d, x, y, prerotate) \
vpaddd x, y, x; \
vpaddd x, RK1, RT;\
prerotate(a); \
vpxor RT, c, c; \
vpaddd y, x, y; \
vpaddd y, RK2, y; \
vpxor d, y, d; \
vpsrld $1, d, y; \
vpslld $(32 - 1), d, d; \
vpor d, y, d; \
#define rotate_1l(x) \
vpslld $1, x, RR; \
vpsrld $(32 - 1), x, x; \
vpor x, RR, x;
#define preload_rgi(c) \
vmovq c, RGI1; \
vpextrq $1, c, RGI2;
#define encrypt_round(n, a, b, c, d, preload, prerotate) \
vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
round_head_2(a, b, RX0, RY0, RX1, RY1); \
encround_tail(a ## 1, b ## 1, c ## 1, d ## 1, RX0, RY0, prerotate); \
preload(c ## 1); \
encround_tail(a ## 2, b ## 2, c ## 2, d ## 2, RX1, RY1, prerotate);
#define decrypt_round(n, a, b, c, d, preload, prerotate) \
vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
round_head_2(a, b, RX0, RY0, RX1, RY1); \
decround_tail(a ## 1, b ## 1, c ## 1, d ## 1, RX0, RY0, prerotate); \
preload(c ## 1); \
decround_tail(a ## 2, b ## 2, c ## 2, d ## 2, RX1, RY1, prerotate);
#define encrypt_cycle(n) \
encrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l); \
encrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l);
#define encrypt_cycle_last(n) \
encrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l); \
encrypt_round(((2*n) + 1), RC, RD, RA, RB, dummy, dummy);
#define decrypt_cycle(n) \
decrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l); \
decrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l);
#define decrypt_cycle_last(n) \
decrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l); \
decrypt_round((2*n), RA, RB, RC, RD, dummy, dummy);
#define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
vpunpckldq x1, x0, t0; \
vpunpckhdq x1, x0, t2; \
vpunpckldq x3, x2, t1; \
vpunpckhdq x3, x2, x3; \
\
vpunpcklqdq t1, t0, x0; \
vpunpckhqdq t1, t0, x1; \
vpunpcklqdq x3, t2, x2; \
vpunpckhqdq x3, t2, x3;
#define inpack_blocks(x0, x1, x2, x3, wkey, t0, t1, t2) \
vpxor x0, wkey, x0; \
vpxor x1, wkey, x1; \
vpxor x2, wkey, x2; \
vpxor x3, wkey, x3; \
\
transpose_4x4(x0, x1, x2, x3, t0, t1, t2)
#define outunpack_blocks(x0, x1, x2, x3, wkey, t0, t1, t2) \
transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
\
vpxor x0, wkey, x0; \
vpxor x1, wkey, x1; \
vpxor x2, wkey, x2; \
vpxor x3, wkey, x3;
.align 8
__twofish_enc_blk8:
/* input:
* %rdi: ctx, CTX
* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: blocks
* output:
* RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2: encrypted blocks
*/
vmovdqu w(CTX), RK1;
pushq %r13;
pushq %rbx;
pushq %rcx;
inpack_blocks(RA1, RB1, RC1, RD1, RK1, RX0, RY0, RK2);
preload_rgi(RA1);
rotate_1l(RD1);
inpack_blocks(RA2, RB2, RC2, RD2, RK1, RX0, RY0, RK2);
rotate_1l(RD2);
encrypt_cycle(0);
encrypt_cycle(1);
encrypt_cycle(2);
encrypt_cycle(3);
encrypt_cycle(4);
encrypt_cycle(5);
encrypt_cycle(6);
encrypt_cycle_last(7);
vmovdqu (w+4*4)(CTX), RK1;
popq %rcx;
popq %rbx;
popq %r13;
outunpack_blocks(RC1, RD1, RA1, RB1, RK1, RX0, RY0, RK2);
outunpack_blocks(RC2, RD2, RA2, RB2, RK1, RX0, RY0, RK2);
ret;
ENDPROC(__twofish_enc_blk8)
.align 8
__twofish_dec_blk8:
/* input:
* %rdi: ctx, CTX
* RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2: encrypted blocks
* output:
* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: decrypted blocks
*/
vmovdqu (w+4*4)(CTX), RK1;
pushq %r13;
pushq %rbx;
inpack_blocks(RC1, RD1, RA1, RB1, RK1, RX0, RY0, RK2);
preload_rgi(RC1);
rotate_1l(RA1);
inpack_blocks(RC2, RD2, RA2, RB2, RK1, RX0, RY0, RK2);
rotate_1l(RA2);
decrypt_cycle(7);
decrypt_cycle(6);
decrypt_cycle(5);
decrypt_cycle(4);
decrypt_cycle(3);
decrypt_cycle(2);
decrypt_cycle(1);
decrypt_cycle_last(0);
vmovdqu (w)(CTX), RK1;
popq %rbx;
popq %r13;
outunpack_blocks(RA1, RB1, RC1, RD1, RK1, RX0, RY0, RK2);
outunpack_blocks(RA2, RB2, RC2, RD2, RK1, RX0, RY0, RK2);
ret;
ENDPROC(__twofish_dec_blk8)
ENTRY(twofish_ecb_enc_8way)
/* input:
* %rdi: ctx, CTX
* %rsi: dst
* %rdx: src
*/
FRAME_BEGIN
movq %rsi, %r11;
load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
call __twofish_enc_blk8;
store_8way(%r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
FRAME_END
ret;
ENDPROC(twofish_ecb_enc_8way)
ENTRY(twofish_ecb_dec_8way)
/* input:
* %rdi: ctx, CTX
* %rsi: dst
* %rdx: src
*/
FRAME_BEGIN
movq %rsi, %r11;
load_8way(%rdx, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
call __twofish_dec_blk8;
store_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
FRAME_END
ret;
ENDPROC(twofish_ecb_dec_8way)
ENTRY(twofish_cbc_dec_8way)
/* input:
* %rdi: ctx, CTX
* %rsi: dst
* %rdx: src
*/
FRAME_BEGIN
pushq %r12;
movq %rsi, %r11;
movq %rdx, %r12;
load_8way(%rdx, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
call __twofish_dec_blk8;
store_cbc_8way(%r12, %r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
popq %r12;
FRAME_END
ret;
ENDPROC(twofish_cbc_dec_8way)
ENTRY(twofish_ctr_8way)
/* input:
* %rdi: ctx, CTX
* %rsi: dst
* %rdx: src
* %rcx: iv (little endian, 128bit)
*/
FRAME_BEGIN
pushq %r12;
movq %rsi, %r11;
movq %rdx, %r12;
load_ctr_8way(%rcx, .Lbswap128_mask, RA1, RB1, RC1, RD1, RA2, RB2, RC2,
RD2, RX0, RX1, RY0);
call __twofish_enc_blk8;
store_ctr_8way(%r12, %r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
popq %r12;
FRAME_END
ret;
ENDPROC(twofish_ctr_8way)
ENTRY(twofish_xts_enc_8way)
/* input:
* %rdi: ctx, CTX
* %rsi: dst
* %rdx: src
* %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
*/
FRAME_BEGIN
movq %rsi, %r11;
/* regs <= src, dst <= IVs, regs <= regs xor IVs */
load_xts_8way(%rcx, %rdx, %rsi, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2,
RX0, RX1, RY0, .Lxts_gf128mul_and_shl1_mask);
call __twofish_enc_blk8;
/* dst <= regs xor IVs(in dst) */
store_xts_8way(%r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
FRAME_END
ret;
ENDPROC(twofish_xts_enc_8way)
ENTRY(twofish_xts_dec_8way)
/* input:
* %rdi: ctx, CTX
* %rsi: dst
* %rdx: src
* %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
*/
FRAME_BEGIN
movq %rsi, %r11;
/* regs <= src, dst <= IVs, regs <= regs xor IVs */
load_xts_8way(%rcx, %rdx, %rsi, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2,
RX0, RX1, RY0, .Lxts_gf128mul_and_shl1_mask);
call __twofish_dec_blk8;
/* dst <= regs xor IVs(in dst) */
store_xts_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
FRAME_END
ret;
ENDPROC(twofish_xts_dec_8way)
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