559 lines
11 KiB
ArmAsm
559 lines
11 KiB
ArmAsm
/*
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* This is a SIMD SHA-1 implementation. It requires the Intel(R) Supplemental
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* SSE3 instruction set extensions introduced in Intel Core Microarchitecture
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* processors. CPUs supporting Intel(R) AVX extensions will get an additional
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* boost.
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*
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* This work was inspired by the vectorized implementation of Dean Gaudet.
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* Additional information on it can be found at:
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* http://www.arctic.org/~dean/crypto/sha1.html
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*
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* It was improved upon with more efficient vectorization of the message
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* scheduling. This implementation has also been optimized for all current and
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* several future generations of Intel CPUs.
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*
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* See this article for more information about the implementation details:
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* http://software.intel.com/en-us/articles/improving-the-performance-of-the-secure-hash-algorithm-1/
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*
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* Copyright (C) 2010, Intel Corp.
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* Authors: Maxim Locktyukhin <maxim.locktyukhin@intel.com>
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* Ronen Zohar <ronen.zohar@intel.com>
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*
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* Converted to AT&T syntax and adapted for inclusion in the Linux kernel:
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* Author: Mathias Krause <minipli@googlemail.com>
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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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#include <linux/linkage.h>
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#define CTX %rdi // arg1
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#define BUF %rsi // arg2
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#define CNT %rdx // arg3
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#define REG_A %ecx
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#define REG_B %esi
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#define REG_C %edi
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#define REG_D %ebp
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#define REG_E %edx
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#define REG_T1 %eax
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#define REG_T2 %ebx
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#define K_BASE %r8
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#define HASH_PTR %r9
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#define BUFFER_PTR %r10
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#define BUFFER_END %r11
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#define W_TMP1 %xmm0
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#define W_TMP2 %xmm9
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#define W0 %xmm1
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#define W4 %xmm2
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#define W8 %xmm3
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#define W12 %xmm4
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#define W16 %xmm5
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#define W20 %xmm6
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#define W24 %xmm7
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#define W28 %xmm8
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#define XMM_SHUFB_BSWAP %xmm10
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/* we keep window of 64 w[i]+K pre-calculated values in a circular buffer */
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#define WK(t) (((t) & 15) * 4)(%rsp)
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#define W_PRECALC_AHEAD 16
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/*
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* This macro implements the SHA-1 function's body for single 64-byte block
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* param: function's name
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*/
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.macro SHA1_VECTOR_ASM name
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ENTRY(\name)
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push %rbx
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push %rbp
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push %r12
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mov %rsp, %r12
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sub $64, %rsp # allocate workspace
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and $~15, %rsp # align stack
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mov CTX, HASH_PTR
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mov BUF, BUFFER_PTR
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shl $6, CNT # multiply by 64
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add BUF, CNT
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mov CNT, BUFFER_END
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lea K_XMM_AR(%rip), K_BASE
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xmm_mov BSWAP_SHUFB_CTL(%rip), XMM_SHUFB_BSWAP
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SHA1_PIPELINED_MAIN_BODY
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# cleanup workspace
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mov $8, %ecx
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mov %rsp, %rdi
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xor %rax, %rax
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rep stosq
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mov %r12, %rsp # deallocate workspace
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pop %r12
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pop %rbp
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pop %rbx
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ret
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ENDPROC(\name)
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.endm
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/*
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* This macro implements 80 rounds of SHA-1 for one 64-byte block
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*/
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.macro SHA1_PIPELINED_MAIN_BODY
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INIT_REGALLOC
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mov (HASH_PTR), A
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mov 4(HASH_PTR), B
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mov 8(HASH_PTR), C
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mov 12(HASH_PTR), D
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mov 16(HASH_PTR), E
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.set i, 0
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.rept W_PRECALC_AHEAD
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W_PRECALC i
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.set i, (i+1)
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.endr
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.align 4
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1:
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RR F1,A,B,C,D,E,0
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RR F1,D,E,A,B,C,2
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RR F1,B,C,D,E,A,4
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RR F1,E,A,B,C,D,6
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RR F1,C,D,E,A,B,8
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RR F1,A,B,C,D,E,10
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RR F1,D,E,A,B,C,12
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RR F1,B,C,D,E,A,14
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RR F1,E,A,B,C,D,16
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RR F1,C,D,E,A,B,18
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RR F2,A,B,C,D,E,20
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RR F2,D,E,A,B,C,22
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RR F2,B,C,D,E,A,24
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RR F2,E,A,B,C,D,26
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RR F2,C,D,E,A,B,28
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RR F2,A,B,C,D,E,30
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RR F2,D,E,A,B,C,32
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RR F2,B,C,D,E,A,34
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RR F2,E,A,B,C,D,36
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RR F2,C,D,E,A,B,38
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RR F3,A,B,C,D,E,40
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RR F3,D,E,A,B,C,42
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RR F3,B,C,D,E,A,44
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RR F3,E,A,B,C,D,46
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RR F3,C,D,E,A,B,48
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RR F3,A,B,C,D,E,50
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RR F3,D,E,A,B,C,52
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RR F3,B,C,D,E,A,54
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RR F3,E,A,B,C,D,56
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RR F3,C,D,E,A,B,58
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add $64, BUFFER_PTR # move to the next 64-byte block
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cmp BUFFER_END, BUFFER_PTR # if the current is the last one use
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cmovae K_BASE, BUFFER_PTR # dummy source to avoid buffer overrun
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RR F4,A,B,C,D,E,60
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RR F4,D,E,A,B,C,62
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RR F4,B,C,D,E,A,64
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RR F4,E,A,B,C,D,66
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RR F4,C,D,E,A,B,68
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RR F4,A,B,C,D,E,70
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RR F4,D,E,A,B,C,72
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RR F4,B,C,D,E,A,74
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RR F4,E,A,B,C,D,76
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RR F4,C,D,E,A,B,78
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UPDATE_HASH (HASH_PTR), A
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UPDATE_HASH 4(HASH_PTR), B
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UPDATE_HASH 8(HASH_PTR), C
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UPDATE_HASH 12(HASH_PTR), D
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UPDATE_HASH 16(HASH_PTR), E
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RESTORE_RENAMED_REGS
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cmp K_BASE, BUFFER_PTR # K_BASE means, we reached the end
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jne 1b
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.endm
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.macro INIT_REGALLOC
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.set A, REG_A
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.set B, REG_B
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.set C, REG_C
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.set D, REG_D
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.set E, REG_E
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.set T1, REG_T1
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.set T2, REG_T2
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.endm
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.macro RESTORE_RENAMED_REGS
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# order is important (REG_C is where it should be)
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mov B, REG_B
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mov D, REG_D
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mov A, REG_A
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mov E, REG_E
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.endm
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.macro SWAP_REG_NAMES a, b
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.set _T, \a
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.set \a, \b
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.set \b, _T
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.endm
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.macro F1 b, c, d
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mov \c, T1
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SWAP_REG_NAMES \c, T1
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xor \d, T1
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and \b, T1
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xor \d, T1
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.endm
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.macro F2 b, c, d
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mov \d, T1
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SWAP_REG_NAMES \d, T1
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xor \c, T1
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xor \b, T1
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.endm
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.macro F3 b, c ,d
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mov \c, T1
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SWAP_REG_NAMES \c, T1
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mov \b, T2
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or \b, T1
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and \c, T2
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and \d, T1
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or T2, T1
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.endm
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.macro F4 b, c, d
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F2 \b, \c, \d
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.endm
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.macro UPDATE_HASH hash, val
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add \hash, \val
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mov \val, \hash
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.endm
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/*
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* RR does two rounds of SHA-1 back to back with W[] pre-calc
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* t1 = F(b, c, d); e += w(i)
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* e += t1; b <<= 30; d += w(i+1);
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* t1 = F(a, b, c);
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* d += t1; a <<= 5;
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* e += a;
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* t1 = e; a >>= 7;
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* t1 <<= 5;
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* d += t1;
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*/
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.macro RR F, a, b, c, d, e, round
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add WK(\round), \e
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\F \b, \c, \d # t1 = F(b, c, d);
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W_PRECALC (\round + W_PRECALC_AHEAD)
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rol $30, \b
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add T1, \e
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add WK(\round + 1), \d
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\F \a, \b, \c
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W_PRECALC (\round + W_PRECALC_AHEAD + 1)
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rol $5, \a
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add \a, \e
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add T1, \d
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ror $7, \a # (a <<r 5) >>r 7) => a <<r 30)
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mov \e, T1
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SWAP_REG_NAMES \e, T1
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rol $5, T1
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add T1, \d
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# write: \a, \b
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# rotate: \a<=\d, \b<=\e, \c<=\a, \d<=\b, \e<=\c
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.endm
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.macro W_PRECALC r
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.set i, \r
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.if (i < 20)
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.set K_XMM, 0
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.elseif (i < 40)
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.set K_XMM, 16
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.elseif (i < 60)
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.set K_XMM, 32
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.elseif (i < 80)
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.set K_XMM, 48
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.endif
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.if ((i < 16) || ((i >= 80) && (i < (80 + W_PRECALC_AHEAD))))
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.set i, ((\r) % 80) # pre-compute for the next iteration
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.if (i == 0)
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W_PRECALC_RESET
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.endif
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W_PRECALC_00_15
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.elseif (i<32)
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W_PRECALC_16_31
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.elseif (i < 80) // rounds 32-79
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W_PRECALC_32_79
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.endif
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.endm
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.macro W_PRECALC_RESET
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.set W, W0
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.set W_minus_04, W4
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.set W_minus_08, W8
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.set W_minus_12, W12
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.set W_minus_16, W16
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.set W_minus_20, W20
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.set W_minus_24, W24
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.set W_minus_28, W28
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.set W_minus_32, W
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.endm
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.macro W_PRECALC_ROTATE
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.set W_minus_32, W_minus_28
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.set W_minus_28, W_minus_24
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.set W_minus_24, W_minus_20
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.set W_minus_20, W_minus_16
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.set W_minus_16, W_minus_12
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.set W_minus_12, W_minus_08
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.set W_minus_08, W_minus_04
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.set W_minus_04, W
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.set W, W_minus_32
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.endm
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.macro W_PRECALC_SSSE3
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.macro W_PRECALC_00_15
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W_PRECALC_00_15_SSSE3
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.endm
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.macro W_PRECALC_16_31
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W_PRECALC_16_31_SSSE3
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.endm
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.macro W_PRECALC_32_79
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W_PRECALC_32_79_SSSE3
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.endm
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/* message scheduling pre-compute for rounds 0-15 */
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.macro W_PRECALC_00_15_SSSE3
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.if ((i & 3) == 0)
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movdqu (i*4)(BUFFER_PTR), W_TMP1
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.elseif ((i & 3) == 1)
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pshufb XMM_SHUFB_BSWAP, W_TMP1
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movdqa W_TMP1, W
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.elseif ((i & 3) == 2)
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paddd (K_BASE), W_TMP1
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.elseif ((i & 3) == 3)
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movdqa W_TMP1, WK(i&~3)
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W_PRECALC_ROTATE
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.endif
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.endm
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/* message scheduling pre-compute for rounds 16-31
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*
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* - calculating last 32 w[i] values in 8 XMM registers
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* - pre-calculate K+w[i] values and store to mem, for later load by ALU add
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* instruction
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*
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* some "heavy-lifting" vectorization for rounds 16-31 due to w[i]->w[i-3]
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* dependency, but improves for 32-79
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*/
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.macro W_PRECALC_16_31_SSSE3
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# blended scheduling of vector and scalar instruction streams, one 4-wide
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# vector iteration / 4 scalar rounds
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.if ((i & 3) == 0)
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movdqa W_minus_12, W
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palignr $8, W_minus_16, W # w[i-14]
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movdqa W_minus_04, W_TMP1
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psrldq $4, W_TMP1 # w[i-3]
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pxor W_minus_08, W
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.elseif ((i & 3) == 1)
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pxor W_minus_16, W_TMP1
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pxor W_TMP1, W
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movdqa W, W_TMP2
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movdqa W, W_TMP1
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pslldq $12, W_TMP2
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.elseif ((i & 3) == 2)
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psrld $31, W
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pslld $1, W_TMP1
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por W, W_TMP1
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movdqa W_TMP2, W
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psrld $30, W_TMP2
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pslld $2, W
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.elseif ((i & 3) == 3)
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pxor W, W_TMP1
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pxor W_TMP2, W_TMP1
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movdqa W_TMP1, W
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paddd K_XMM(K_BASE), W_TMP1
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movdqa W_TMP1, WK(i&~3)
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W_PRECALC_ROTATE
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.endif
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.endm
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/* message scheduling pre-compute for rounds 32-79
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*
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* in SHA-1 specification: w[i] = (w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16]) rol 1
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* instead we do equal: w[i] = (w[i-6] ^ w[i-16] ^ w[i-28] ^ w[i-32]) rol 2
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* allows more efficient vectorization since w[i]=>w[i-3] dependency is broken
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*/
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.macro W_PRECALC_32_79_SSSE3
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.if ((i & 3) == 0)
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movdqa W_minus_04, W_TMP1
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pxor W_minus_28, W # W is W_minus_32 before xor
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palignr $8, W_minus_08, W_TMP1
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.elseif ((i & 3) == 1)
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pxor W_minus_16, W
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pxor W_TMP1, W
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movdqa W, W_TMP1
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.elseif ((i & 3) == 2)
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psrld $30, W
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pslld $2, W_TMP1
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por W, W_TMP1
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.elseif ((i & 3) == 3)
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movdqa W_TMP1, W
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paddd K_XMM(K_BASE), W_TMP1
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movdqa W_TMP1, WK(i&~3)
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W_PRECALC_ROTATE
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.endif
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.endm
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.endm // W_PRECALC_SSSE3
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#define K1 0x5a827999
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#define K2 0x6ed9eba1
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#define K3 0x8f1bbcdc
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#define K4 0xca62c1d6
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.section .rodata
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.align 16
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K_XMM_AR:
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.long K1, K1, K1, K1
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.long K2, K2, K2, K2
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.long K3, K3, K3, K3
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.long K4, K4, K4, K4
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BSWAP_SHUFB_CTL:
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.long 0x00010203
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.long 0x04050607
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.long 0x08090a0b
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.long 0x0c0d0e0f
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.section .text
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W_PRECALC_SSSE3
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.macro xmm_mov a, b
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movdqu \a,\b
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.endm
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/* SSSE3 optimized implementation:
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* extern "C" void sha1_transform_ssse3(u32 *digest, const char *data, u32 *ws,
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* unsigned int rounds);
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*/
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SHA1_VECTOR_ASM sha1_transform_ssse3
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#ifdef CONFIG_AS_AVX
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.macro W_PRECALC_AVX
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.purgem W_PRECALC_00_15
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.macro W_PRECALC_00_15
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W_PRECALC_00_15_AVX
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.endm
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.purgem W_PRECALC_16_31
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.macro W_PRECALC_16_31
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W_PRECALC_16_31_AVX
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.endm
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.purgem W_PRECALC_32_79
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.macro W_PRECALC_32_79
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W_PRECALC_32_79_AVX
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.endm
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.macro W_PRECALC_00_15_AVX
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.if ((i & 3) == 0)
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vmovdqu (i*4)(BUFFER_PTR), W_TMP1
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.elseif ((i & 3) == 1)
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vpshufb XMM_SHUFB_BSWAP, W_TMP1, W
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.elseif ((i & 3) == 2)
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vpaddd (K_BASE), W, W_TMP1
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.elseif ((i & 3) == 3)
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vmovdqa W_TMP1, WK(i&~3)
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W_PRECALC_ROTATE
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.endif
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|
.endm
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|
|
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.macro W_PRECALC_16_31_AVX
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|
.if ((i & 3) == 0)
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vpalignr $8, W_minus_16, W_minus_12, W # w[i-14]
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|
vpsrldq $4, W_minus_04, W_TMP1 # w[i-3]
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|
vpxor W_minus_08, W, W
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|
vpxor W_minus_16, W_TMP1, W_TMP1
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.elseif ((i & 3) == 1)
|
|
vpxor W_TMP1, W, W
|
|
vpslldq $12, W, W_TMP2
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|
vpslld $1, W, W_TMP1
|
|
.elseif ((i & 3) == 2)
|
|
vpsrld $31, W, W
|
|
vpor W, W_TMP1, W_TMP1
|
|
vpslld $2, W_TMP2, W
|
|
vpsrld $30, W_TMP2, W_TMP2
|
|
.elseif ((i & 3) == 3)
|
|
vpxor W, W_TMP1, W_TMP1
|
|
vpxor W_TMP2, W_TMP1, W
|
|
vpaddd K_XMM(K_BASE), W, W_TMP1
|
|
vmovdqu W_TMP1, WK(i&~3)
|
|
W_PRECALC_ROTATE
|
|
.endif
|
|
.endm
|
|
|
|
.macro W_PRECALC_32_79_AVX
|
|
.if ((i & 3) == 0)
|
|
vpalignr $8, W_minus_08, W_minus_04, W_TMP1
|
|
vpxor W_minus_28, W, W # W is W_minus_32 before xor
|
|
.elseif ((i & 3) == 1)
|
|
vpxor W_minus_16, W_TMP1, W_TMP1
|
|
vpxor W_TMP1, W, W
|
|
.elseif ((i & 3) == 2)
|
|
vpslld $2, W, W_TMP1
|
|
vpsrld $30, W, W
|
|
vpor W, W_TMP1, W
|
|
.elseif ((i & 3) == 3)
|
|
vpaddd K_XMM(K_BASE), W, W_TMP1
|
|
vmovdqu W_TMP1, WK(i&~3)
|
|
W_PRECALC_ROTATE
|
|
.endif
|
|
.endm
|
|
|
|
.endm // W_PRECALC_AVX
|
|
|
|
W_PRECALC_AVX
|
|
.purgem xmm_mov
|
|
.macro xmm_mov a, b
|
|
vmovdqu \a,\b
|
|
.endm
|
|
|
|
|
|
/* AVX optimized implementation:
|
|
* extern "C" void sha1_transform_avx(u32 *digest, const char *data, u32 *ws,
|
|
* unsigned int rounds);
|
|
*/
|
|
SHA1_VECTOR_ASM sha1_transform_avx
|
|
|
|
#endif
|