![Johannes Goetzfried](/assets/img/avatar_default.png)
This patch adds a x86_64/avx assembler implementation of the Twofish block cipher. The implementation processes eight blocks in parallel (two 4 block chunk AVX operations). The table-lookups are done in general-purpose registers. For small blocksizes the 3way-parallel functions from the twofish-x86_64-3way module are called. A good performance increase is provided for blocksizes greater or equal to 128B. Patch has been tested with tcrypt and automated filesystem tests. Tcrypt benchmark results: Intel Core i5-2500 CPU (fam:6, model:42, step:7) twofish-avx-x86_64 vs. twofish-x86_64-3way 128bit key: (lrw:256bit) (xts:256bit) size ecb-enc ecb-dec cbc-enc cbc-dec ctr-enc ctr-dec lrw-enc lrw-dec xts-enc xts-dec 16B 0.96x 0.97x 1.00x 0.95x 0.97x 0.97x 0.96x 0.95x 0.95x 0.98x 64B 0.99x 0.99x 1.00x 0.99x 0.98x 0.98x 0.99x 0.98x 0.99x 0.98x 256B 1.20x 1.21x 1.00x 1.19x 1.15x 1.14x 1.19x 1.20x 1.18x 1.19x 1024B 1.29x 1.30x 1.00x 1.28x 1.23x 1.24x 1.26x 1.28x 1.26x 1.27x 8192B 1.31x 1.32x 1.00x 1.31x 1.25x 1.25x 1.28x 1.29x 1.28x 1.30x 256bit key: (lrw:384bit) (xts:512bit) size ecb-enc ecb-dec cbc-enc cbc-dec ctr-enc ctr-dec lrw-enc lrw-dec xts-enc xts-dec 16B 0.96x 0.96x 1.00x 0.96x 0.97x 0.98x 0.95x 0.95x 0.95x 0.96x 64B 1.00x 0.99x 1.00x 0.98x 0.98x 1.01x 0.98x 0.98x 0.98x 0.98x 256B 1.20x 1.21x 1.00x 1.21x 1.15x 1.15x 1.19x 1.20x 1.18x 1.19x 1024B 1.29x 1.30x 1.00x 1.28x 1.23x 1.23x 1.26x 1.27x 1.26x 1.27x 8192B 1.31x 1.33x 1.00x 1.31x 1.26x 1.26x 1.29x 1.29x 1.28x 1.30x twofish-avx-x86_64 vs aes-asm (8kB block): 128bit 256bit ecb-enc 1.19x 1.63x ecb-dec 1.18x 1.62x cbc-enc 0.75x 1.03x cbc-dec 1.23x 1.67x ctr-enc 1.24x 1.65x ctr-dec 1.24x 1.65x lrw-enc 1.15x 1.53x lrw-dec 1.14x 1.52x xts-enc 1.16x 1.56x xts-dec 1.16x 1.56x Signed-off-by: Johannes Goetzfried <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
302 lines
7.3 KiB
ArmAsm
302 lines
7.3 KiB
ArmAsm
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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.file "twofish-avx-x86_64-asm_64.S"
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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 RX %xmm8
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#define RY %xmm9
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#define RK1 %xmm10
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#define RK2 %xmm11
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#define RID1 %rax
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#define RID1b %al
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#define RID2 %rbx
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#define RID2b %bl
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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 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) \
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movb src ## bl, RID1b; \
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movb src ## bh, RID2b; \
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movl t0(CTX, RID1, 4), dst ## d; \
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xorl t1(CTX, RID2, 4), dst ## d; \
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shrq $16, src; \
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movb src ## bl, RID1b; \
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movb src ## bh, RID2b; \
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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 G(a, x, t0, t1, t2, t3) \
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vmovq a, RGI1; \
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vpsrldq $8, a, x; \
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vmovq x, RGI2; \
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\
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lookup_32bit(t0, t1, t2, t3, RGI1, RGS1); \
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shrq $16, RGI1; \
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lookup_32bit(t0, t1, t2, t3, RGI1, RGS2); \
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shlq $32, RGS2; \
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orq RGS1, RGS2; \
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\
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lookup_32bit(t0, t1, t2, t3, RGI2, RGS1); \
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shrq $16, RGI2; \
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lookup_32bit(t0, t1, t2, t3, RGI2, RGS3); \
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shlq $32, RGS3; \
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orq RGS1, RGS3; \
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\
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vmovq RGS2, x; \
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vpinsrq $1, RGS3, x, x;
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#define encround(a, b, c, d, x, y) \
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G(a, x, s0, s1, s2, s3); \
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G(b, y, s1, s2, s3, s0); \
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vpaddd x, y, x; \
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vpaddd y, x, y; \
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vpaddd x, RK1, x; \
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vpaddd y, RK2, y; \
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vpxor x, c, c; \
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vpsrld $1, c, x; \
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vpslld $(32 - 1), c, c; \
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vpor c, x, c; \
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vpslld $1, d, x; \
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vpsrld $(32 - 1), d, d; \
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vpor d, x, d; \
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vpxor d, y, d;
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#define decround(a, b, c, d, x, y) \
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G(a, x, s0, s1, s2, s3); \
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G(b, y, s1, s2, s3, s0); \
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vpaddd x, y, x; \
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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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vpslld $1, c, y; \
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vpsrld $(32 - 1), c, c; \
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vpor c, y, c; \
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vpaddd x, RK1, x; \
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vpxor x, c, c;
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#define encrypt_round(n, a, b, c, d) \
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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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encround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \
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encround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY);
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#define decrypt_round(n, a, b, c, d) \
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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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decround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \
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decround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY);
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#define encrypt_cycle(n) \
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encrypt_round((2*n), RA, RB, RC, RD); \
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encrypt_round(((2*n) + 1), RC, RD, RA, RB);
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#define decrypt_cycle(n) \
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decrypt_round(((2*n) + 1), RC, RD, RA, RB); \
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decrypt_round((2*n), RA, RB, RC, RD);
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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(in, x0, x1, x2, x3, wkey, t0, t1, t2) \
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vpxor (0*4*4)(in), wkey, x0; \
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vpxor (1*4*4)(in), wkey, x1; \
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vpxor (2*4*4)(in), wkey, x2; \
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vpxor (3*4*4)(in), 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(out, 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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vmovdqu x0, (0*4*4)(out); \
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vpxor x1, wkey, x1; \
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vmovdqu x1, (1*4*4)(out); \
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vpxor x2, wkey, x2; \
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vmovdqu x2, (2*4*4)(out); \
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vpxor x3, wkey, x3; \
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vmovdqu x3, (3*4*4)(out);
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#define outunpack_xor_blocks(out, 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 (0*4*4)(out), x0, x0; \
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vmovdqu x0, (0*4*4)(out); \
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vpxor x1, wkey, x1; \
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vpxor (1*4*4)(out), x1, x1; \
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vmovdqu x1, (1*4*4)(out); \
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vpxor x2, wkey, x2; \
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vpxor (2*4*4)(out), x2, x2; \
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vmovdqu x2, (2*4*4)(out); \
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vpxor x3, wkey, x3; \
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vpxor (3*4*4)(out), x3, x3; \
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vmovdqu x3, (3*4*4)(out);
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.align 8
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.global __twofish_enc_blk_8way
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.type __twofish_enc_blk_8way,@function;
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__twofish_enc_blk_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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* %rcx: bool, if true: xor output
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*/
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pushq %rbx;
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pushq %rcx;
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vmovdqu w(CTX), RK1;
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leaq (4*4*4)(%rdx), %rax;
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inpack_blocks(%rdx, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2);
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inpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2);
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xorq RID1, RID1;
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xorq RID2, RID2;
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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(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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leaq (4*4*4)(%rsi), %rax;
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leaq (4*4*4)(%rax), %rdx;
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testb %cl, %cl;
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jnz __enc_xor8;
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outunpack_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
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outunpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
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ret;
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__enc_xor8:
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outunpack_xor_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
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outunpack_xor_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
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ret;
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.align 8
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.global twofish_dec_blk_8way
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.type twofish_dec_blk_8way,@function;
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twofish_dec_blk_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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pushq %rbx;
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vmovdqu (w+4*4)(CTX), RK1;
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leaq (4*4*4)(%rdx), %rax;
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inpack_blocks(%rdx, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
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inpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
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xorq RID1, RID1;
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xorq RID2, RID2;
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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(0);
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vmovdqu (w)(CTX), RK1;
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popq %rbx;
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leaq (4*4*4)(%rsi), %rax;
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outunpack_blocks(%rsi, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2);
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outunpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2);
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ret;
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