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