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64b94ceae8
Patch adds x86_64 assembly implementation of blowfish. Two set of assembler functions are provided. First set is regular 'one-block at time' encrypt/decrypt functions. Second is 'four-block at time' functions that gain performance increase on out-of-order CPUs. Performance of 4-way functions should be equal to 1-way functions with in-order CPUs. Summary of the tcrypt benchmarks: Blowfish assembler vs blowfish C (256bit 8kb block ECB) encrypt: 2.2x speed decrypt: 2.3x speed Blowfish assembler vs blowfish C (256bit 8kb block CBC) encrypt: 1.12x speed decrypt: 2.5x speed Blowfish assembler vs blowfish C (256bit 8kb block CTR) encrypt: 2.5x speed Full output: http://koti.mbnet.fi/axh/kernel/crypto/tcrypt-speed-blowfish-asm-x86_64.txt http://koti.mbnet.fi/axh/kernel/crypto/tcrypt-speed-blowfish-c-x86_64.txt Tests were run on: vendor_id : AuthenticAMD cpu family : 16 model : 10 model name : AMD Phenom(tm) II X6 1055T Processor stepping : 0 Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
393 lines
6.3 KiB
ArmAsm
393 lines
6.3 KiB
ArmAsm
/*
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* Blowfish Cipher Algorithm (x86_64)
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*
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* Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
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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 "blowfish-x86_64-asm.S"
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.text
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/* structure of crypto context */
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#define p 0
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#define s0 ((16 + 2) * 4)
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#define s1 ((16 + 2 + (1 * 256)) * 4)
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#define s2 ((16 + 2 + (2 * 256)) * 4)
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#define s3 ((16 + 2 + (3 * 256)) * 4)
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/* register macros */
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#define CTX %rdi
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#define RIO %rsi
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#define RX0 %rax
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#define RX1 %rbx
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#define RX2 %rcx
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#define RX3 %rdx
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#define RX0d %eax
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#define RX1d %ebx
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#define RX2d %ecx
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#define RX3d %edx
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#define RX0bl %al
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#define RX1bl %bl
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#define RX2bl %cl
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#define RX3bl %dl
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#define RX0bh %ah
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#define RX1bh %bh
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#define RX2bh %ch
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#define RX3bh %dh
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#define RT0 %rbp
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#define RT1 %rsi
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#define RT0d %ebp
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#define RT1d %esi
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#define RK0 %r8
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#define RK1 %r9
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#define RK2 %r10
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#define RK3 %r11
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#define RK0d %r8d
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#define RK1d %r9d
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#define RK2d %r10d
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#define RK3d %r11d
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#define RKEY %r12
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/***********************************************************************
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* 1-way blowfish
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***********************************************************************/
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#define F(x, k) \
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rorq $16, x; \
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movzbl x ## bh, RT0d; \
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movzbl x ## bl, RT1d; \
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rolq $16, x; \
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movl s0(CTX,RT0,4), k ## d; \
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addl s1(CTX,RT1,4), k ## d; \
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movzbl x ## bh, RT0d; \
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movzbl x ## bl, RT1d; \
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rolq $32, x; \
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xorl s2(CTX,RT0,4), k ## d; \
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addl s3(CTX,RT1,4), k ## d; \
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xorq k, x;
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#define add_roundkey_enc(n) \
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xorq p+4*(n)(CTX), RX0;
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#define round_enc(n) \
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add_roundkey_enc(n); \
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\
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F(RX0, RK0); \
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F(RX0, RK0);
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#define round_final_enc(n) \
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xorq p+4*(n)(CTX), RX0;
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#define add_roundkey_dec(n) \
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movq p+4*(n-1)(CTX), RT0; \
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rorq $32, RT0; \
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xorq RT0, RX0;
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#define round_dec(n) \
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add_roundkey_dec(n); \
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\
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F(RX0, RK0); \
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F(RX0, RK0); \
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#define read_block() \
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movq (RIO), RX0; \
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rorq $32, RX0; \
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bswapq RX0;
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#define write_block() \
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bswapq RX0; \
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movq RX0, (RIO);
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#define xor_block() \
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bswapq RX0; \
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xorq RX0, (RIO);
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.align 8
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.global __blowfish_enc_blk
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.type __blowfish_enc_blk,@function;
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__blowfish_enc_blk:
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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 xor
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pushq %rbp;
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pushq %rbx;
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pushq %rsi;
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pushq %rcx;
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movq %rdx, RIO;
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read_block();
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round_enc(0);
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round_enc(2);
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round_enc(4);
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round_enc(6);
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round_enc(8);
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round_enc(10);
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round_enc(12);
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round_enc(14);
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add_roundkey_enc(16);
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popq %rbp;
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popq RIO;
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test %bpl, %bpl;
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jnz __enc_xor;
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write_block();
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__enc_ret:
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popq %rbx;
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popq %rbp;
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ret;
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__enc_xor:
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xor_block();
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jmp __enc_ret;
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.align 8
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.global blowfish_dec_blk
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.type blowfish_dec_blk,@function;
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blowfish_dec_blk:
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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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pushq %rbp;
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pushq %rbx;
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pushq %rsi;
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movq %rdx, RIO;
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read_block();
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round_dec(17);
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round_dec(15);
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round_dec(13);
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round_dec(11);
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round_dec(9);
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round_dec(7);
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round_dec(5);
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round_dec(3);
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add_roundkey_dec(1);
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popq RIO;
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write_block();
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popq %rbx;
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popq %rbp;
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ret;
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/**********************************************************************
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4-way blowfish, four blocks parallel
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**********************************************************************/
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#define add_preloaded_roundkey4() \
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xorq RKEY, RX0; \
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xorq RKEY, RX1; \
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xorq RKEY, RX2; \
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xorq RKEY, RX3;
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#define preload_roundkey_enc(n) \
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movq p+4*(n)(CTX), RKEY;
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#define add_roundkey_enc4(n) \
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add_preloaded_roundkey4(); \
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preload_roundkey_enc(n + 2);
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#define round_enc4(n) \
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add_roundkey_enc4(n); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3);
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#define preload_roundkey_dec(n) \
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movq p+4*((n)-1)(CTX), RKEY; \
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rorq $32, RKEY;
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#define add_roundkey_dec4(n) \
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add_preloaded_roundkey4(); \
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preload_roundkey_dec(n - 2);
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#define round_dec4(n) \
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add_roundkey_dec4(n); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3); \
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\
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F(RX0, RK0); \
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F(RX1, RK1); \
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F(RX2, RK2); \
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F(RX3, RK3);
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#define read_block4() \
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movq (RIO), RX0; \
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rorq $32, RX0; \
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bswapq RX0; \
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\
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movq 8(RIO), RX1; \
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rorq $32, RX1; \
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bswapq RX1; \
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\
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movq 16(RIO), RX2; \
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rorq $32, RX2; \
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bswapq RX2; \
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\
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movq 24(RIO), RX3; \
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rorq $32, RX3; \
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bswapq RX3;
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#define write_block4() \
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bswapq RX0; \
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movq RX0, (RIO); \
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\
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bswapq RX1; \
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movq RX1, 8(RIO); \
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\
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bswapq RX2; \
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movq RX2, 16(RIO); \
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\
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bswapq RX3; \
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movq RX3, 24(RIO);
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#define xor_block4() \
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bswapq RX0; \
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xorq RX0, (RIO); \
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\
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bswapq RX1; \
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xorq RX1, 8(RIO); \
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\
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bswapq RX2; \
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xorq RX2, 16(RIO); \
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\
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bswapq RX3; \
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xorq RX3, 24(RIO);
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.align 8
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.global __blowfish_enc_blk_4way
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.type __blowfish_enc_blk_4way,@function;
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__blowfish_enc_blk_4way:
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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 xor
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pushq %rbp;
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pushq %rbx;
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pushq RKEY;
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preload_roundkey_enc(0);
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pushq %rsi;
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pushq %rcx;
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movq %rdx, RIO;
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read_block4();
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round_enc4(0);
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round_enc4(2);
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round_enc4(4);
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round_enc4(6);
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round_enc4(8);
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round_enc4(10);
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round_enc4(12);
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round_enc4(14);
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add_preloaded_roundkey4();
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popq %rbp;
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popq RIO;
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test %bpl, %bpl;
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jnz __enc_xor4;
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write_block4();
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__enc_ret4:
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popq RKEY;
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popq %rbx;
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popq %rbp;
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ret;
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__enc_xor4:
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xor_block4();
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jmp __enc_ret4;
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.align 8
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.global blowfish_dec_blk_4way
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.type blowfish_dec_blk_4way,@function;
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blowfish_dec_blk_4way:
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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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pushq %rbp;
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pushq %rbx;
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pushq RKEY;
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preload_roundkey_dec(17);
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pushq %rsi;
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movq %rdx, RIO;
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read_block4();
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round_dec4(17);
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round_dec4(15);
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round_dec4(13);
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round_dec4(11);
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round_dec4(9);
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round_dec4(7);
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round_dec4(5);
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round_dec4(3);
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add_preloaded_roundkey4();
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popq RIO;
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write_block4();
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popq RKEY;
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popq %rbx;
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popq %rbp;
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ret;
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