| /* |
| * Twofish Cipher 8-way parallel algorithm (AVX/x86_64) |
| * |
| * Copyright (C) 2012 Johannes Goetzfried |
| * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> |
| * |
| * 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 |
| * |
| */ |
| |
| .file "twofish-avx-x86_64-asm_64.S" |
| .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 RX %xmm8 |
| #define RY %xmm9 |
| |
| #define RK1 %xmm10 |
| #define RK2 %xmm11 |
| |
| #define RID1 %rax |
| #define RID1b %al |
| #define RID2 %rbx |
| #define RID2b %bl |
| |
| #define RGI1 %rdx |
| #define RGI1bl %dl |
| #define RGI1bh %dh |
| #define RGI2 %rcx |
| #define RGI2bl %cl |
| #define RGI2bh %ch |
| |
| #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) \ |
| movb src ## bl, RID1b; \ |
| movb src ## bh, RID2b; \ |
| movl t0(CTX, RID1, 4), dst ## d; \ |
| xorl t1(CTX, RID2, 4), dst ## d; \ |
| shrq $16, src; \ |
| movb src ## bl, RID1b; \ |
| movb src ## bh, RID2b; \ |
| xorl t2(CTX, RID1, 4), dst ## d; \ |
| xorl t3(CTX, RID2, 4), dst ## d; |
| |
| #define G(a, x, t0, t1, t2, t3) \ |
| vmovq a, RGI1; \ |
| vpsrldq $8, a, x; \ |
| vmovq x, RGI2; \ |
| \ |
| lookup_32bit(t0, t1, t2, t3, RGI1, RGS1); \ |
| shrq $16, RGI1; \ |
| lookup_32bit(t0, t1, t2, t3, RGI1, RGS2); \ |
| shlq $32, RGS2; \ |
| orq RGS1, RGS2; \ |
| \ |
| lookup_32bit(t0, t1, t2, t3, RGI2, RGS1); \ |
| shrq $16, RGI2; \ |
| lookup_32bit(t0, t1, t2, t3, RGI2, RGS3); \ |
| shlq $32, RGS3; \ |
| orq RGS1, RGS3; \ |
| \ |
| vmovq RGS2, x; \ |
| vpinsrq $1, RGS3, x, x; |
| |
| #define encround(a, b, c, d, x, y) \ |
| G(a, x, s0, s1, s2, s3); \ |
| G(b, y, s1, s2, s3, s0); \ |
| vpaddd x, y, x; \ |
| vpaddd y, x, y; \ |
| vpaddd x, RK1, x; \ |
| vpaddd y, RK2, y; \ |
| vpxor x, c, c; \ |
| vpsrld $1, c, x; \ |
| vpslld $(32 - 1), c, c; \ |
| vpor c, x, c; \ |
| vpslld $1, d, x; \ |
| vpsrld $(32 - 1), d, d; \ |
| vpor d, x, d; \ |
| vpxor d, y, d; |
| |
| #define decround(a, b, c, d, x, y) \ |
| G(a, x, s0, s1, s2, s3); \ |
| G(b, y, s1, s2, s3, s0); \ |
| vpaddd x, y, x; \ |
| 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; \ |
| vpslld $1, c, y; \ |
| vpsrld $(32 - 1), c, c; \ |
| vpor c, y, c; \ |
| vpaddd x, RK1, x; \ |
| vpxor x, c, c; |
| |
| #define encrypt_round(n, a, b, c, d) \ |
| vbroadcastss (k+4*(2*(n)))(CTX), RK1; \ |
| vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \ |
| encround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \ |
| encround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY); |
| |
| #define decrypt_round(n, a, b, c, d) \ |
| vbroadcastss (k+4*(2*(n)))(CTX), RK1; \ |
| vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \ |
| decround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \ |
| decround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY); |
| |
| #define encrypt_cycle(n) \ |
| encrypt_round((2*n), RA, RB, RC, RD); \ |
| encrypt_round(((2*n) + 1), RC, RD, RA, RB); |
| |
| #define decrypt_cycle(n) \ |
| decrypt_round(((2*n) + 1), RC, RD, RA, RB); \ |
| decrypt_round((2*n), RA, RB, RC, RD); |
| |
| |
| #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(in, x0, x1, x2, x3, wkey, t0, t1, t2) \ |
| vpxor (0*4*4)(in), wkey, x0; \ |
| vpxor (1*4*4)(in), wkey, x1; \ |
| vpxor (2*4*4)(in), wkey, x2; \ |
| vpxor (3*4*4)(in), wkey, x3; \ |
| \ |
| transpose_4x4(x0, x1, x2, x3, t0, t1, t2) |
| |
| #define outunpack_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \ |
| transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \ |
| \ |
| vpxor x0, wkey, x0; \ |
| vmovdqu x0, (0*4*4)(out); \ |
| vpxor x1, wkey, x1; \ |
| vmovdqu x1, (1*4*4)(out); \ |
| vpxor x2, wkey, x2; \ |
| vmovdqu x2, (2*4*4)(out); \ |
| vpxor x3, wkey, x3; \ |
| vmovdqu x3, (3*4*4)(out); |
| |
| #define outunpack_xor_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \ |
| transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \ |
| \ |
| vpxor x0, wkey, x0; \ |
| vpxor (0*4*4)(out), x0, x0; \ |
| vmovdqu x0, (0*4*4)(out); \ |
| vpxor x1, wkey, x1; \ |
| vpxor (1*4*4)(out), x1, x1; \ |
| vmovdqu x1, (1*4*4)(out); \ |
| vpxor x2, wkey, x2; \ |
| vpxor (2*4*4)(out), x2, x2; \ |
| vmovdqu x2, (2*4*4)(out); \ |
| vpxor x3, wkey, x3; \ |
| vpxor (3*4*4)(out), x3, x3; \ |
| vmovdqu x3, (3*4*4)(out); |
| |
| .align 8 |
| .global __twofish_enc_blk_8way |
| .type __twofish_enc_blk_8way,@function; |
| |
| __twofish_enc_blk_8way: |
| /* input: |
| * %rdi: ctx, CTX |
| * %rsi: dst |
| * %rdx: src |
| * %rcx: bool, if true: xor output |
| */ |
| |
| pushq %rbx; |
| pushq %rcx; |
| |
| vmovdqu w(CTX), RK1; |
| |
| leaq (4*4*4)(%rdx), %rax; |
| inpack_blocks(%rdx, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2); |
| inpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2); |
| |
| xorq RID1, RID1; |
| xorq RID2, RID2; |
| |
| encrypt_cycle(0); |
| encrypt_cycle(1); |
| encrypt_cycle(2); |
| encrypt_cycle(3); |
| encrypt_cycle(4); |
| encrypt_cycle(5); |
| encrypt_cycle(6); |
| encrypt_cycle(7); |
| |
| vmovdqu (w+4*4)(CTX), RK1; |
| |
| popq %rcx; |
| popq %rbx; |
| |
| leaq (4*4*4)(%rsi), %rax; |
| |
| testb %cl, %cl; |
| jnz __enc_xor8; |
| |
| outunpack_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2); |
| outunpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2); |
| |
| ret; |
| |
| __enc_xor8: |
| outunpack_xor_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2); |
| outunpack_xor_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2); |
| |
| ret; |
| |
| .align 8 |
| .global twofish_dec_blk_8way |
| .type twofish_dec_blk_8way,@function; |
| |
| twofish_dec_blk_8way: |
| /* input: |
| * %rdi: ctx, CTX |
| * %rsi: dst |
| * %rdx: src |
| */ |
| |
| pushq %rbx; |
| |
| vmovdqu (w+4*4)(CTX), RK1; |
| |
| leaq (4*4*4)(%rdx), %rax; |
| inpack_blocks(%rdx, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2); |
| inpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2); |
| |
| xorq RID1, RID1; |
| xorq RID2, RID2; |
| |
| decrypt_cycle(7); |
| decrypt_cycle(6); |
| decrypt_cycle(5); |
| decrypt_cycle(4); |
| decrypt_cycle(3); |
| decrypt_cycle(2); |
| decrypt_cycle(1); |
| decrypt_cycle(0); |
| |
| vmovdqu (w)(CTX), RK1; |
| |
| popq %rbx; |
| |
| leaq (4*4*4)(%rsi), %rax; |
| outunpack_blocks(%rsi, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2); |
| outunpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2); |
| |
| ret; |
