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/*
* Intel SHA Extensions optimized implementation of a SHA-256 update function
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* Contact Information:
* Sean Gulley <sean.m.gulley@intel.com>
* Tim Chen <tim.c.chen@linux.intel.com>
*
* BSD LICENSE
*
* Copyright(c) 2015 Intel Corporation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/linkage.h>
#define DIGEST_PTR %rdi /* 1st arg */
#define DATA_PTR %rsi /* 2nd arg */
#define NUM_BLKS %rdx /* 3rd arg */
#define SHA256CONSTANTS %rax
#define MSG %xmm0
#define STATE0 %xmm1
#define STATE1 %xmm2
#define MSGTMP0 %xmm3
#define MSGTMP1 %xmm4
#define MSGTMP2 %xmm5
#define MSGTMP3 %xmm6
#define MSGTMP4 %xmm7
#define SHUF_MASK %xmm8
#define ABEF_SAVE %xmm9
#define CDGH_SAVE %xmm10
/*
* Intel SHA Extensions optimized implementation of a SHA-256 update function
*
* The function takes a pointer to the current hash values, a pointer to the
* input data, and a number of 64 byte blocks to process. Once all blocks have
* been processed, the digest pointer is updated with the resulting hash value.
* The function only processes complete blocks, there is no functionality to
* store partial blocks. All message padding and hash value initialization must
* be done outside the update function.
*
* The indented lines in the loop are instructions related to rounds processing.
* The non-indented lines are instructions related to the message schedule.
*
* void sha256_ni_transform(uint32_t *digest, const void *data,
uint32_t numBlocks);
* digest : pointer to digest
* data: pointer to input data
* numBlocks: Number of blocks to process
*/
.text
.align 32
SYM_FUNC_START(sha256_ni_transform)
shl $6, NUM_BLKS /* convert to bytes */
jz .Ldone_hash
add DATA_PTR, NUM_BLKS /* pointer to end of data */
/*
* load initial hash values
* Need to reorder these appropriately
* DCBA, HGFE -> ABEF, CDGH
*/
movdqu 0*16(DIGEST_PTR), STATE0
movdqu 1*16(DIGEST_PTR), STATE1
pshufd $0xB1, STATE0, STATE0 /* CDAB */
pshufd $0x1B, STATE1, STATE1 /* EFGH */
movdqa STATE0, MSGTMP4
palignr $8, STATE1, STATE0 /* ABEF */
pblendw $0xF0, MSGTMP4, STATE1 /* CDGH */
movdqa PSHUFFLE_BYTE_FLIP_MASK(%rip), SHUF_MASK
lea K256(%rip), SHA256CONSTANTS
.Lloop0:
/* Save hash values for addition after rounds */
movdqa STATE0, ABEF_SAVE
movdqa STATE1, CDGH_SAVE
/* Rounds 0-3 */
movdqu 0*16(DATA_PTR), MSG
pshufb SHUF_MASK, MSG
movdqa MSG, MSGTMP0
paddd 0*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
/* Rounds 4-7 */
movdqu 1*16(DATA_PTR), MSG
pshufb SHUF_MASK, MSG
movdqa MSG, MSGTMP1
paddd 1*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP1, MSGTMP0
/* Rounds 8-11 */
movdqu 2*16(DATA_PTR), MSG
pshufb SHUF_MASK, MSG
movdqa MSG, MSGTMP2
paddd 2*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP2, MSGTMP1
/* Rounds 12-15 */
movdqu 3*16(DATA_PTR), MSG
pshufb SHUF_MASK, MSG
movdqa MSG, MSGTMP3
paddd 3*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP3, MSGTMP4
palignr $4, MSGTMP2, MSGTMP4
paddd MSGTMP4, MSGTMP0
sha256msg2 MSGTMP3, MSGTMP0
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP3, MSGTMP2
/* Rounds 16-19 */
movdqa MSGTMP0, MSG
paddd 4*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP0, MSGTMP4
palignr $4, MSGTMP3, MSGTMP4
paddd MSGTMP4, MSGTMP1
sha256msg2 MSGTMP0, MSGTMP1
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP0, MSGTMP3
/* Rounds 20-23 */
movdqa MSGTMP1, MSG
paddd 5*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP1, MSGTMP4
palignr $4, MSGTMP0, MSGTMP4
paddd MSGTMP4, MSGTMP2
sha256msg2 MSGTMP1, MSGTMP2
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP1, MSGTMP0
/* Rounds 24-27 */
movdqa MSGTMP2, MSG
paddd 6*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP2, MSGTMP4
palignr $4, MSGTMP1, MSGTMP4
paddd MSGTMP4, MSGTMP3
sha256msg2 MSGTMP2, MSGTMP3
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP2, MSGTMP1
/* Rounds 28-31 */
movdqa MSGTMP3, MSG
paddd 7*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP3, MSGTMP4
palignr $4, MSGTMP2, MSGTMP4
paddd MSGTMP4, MSGTMP0
sha256msg2 MSGTMP3, MSGTMP0
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP3, MSGTMP2
/* Rounds 32-35 */
movdqa MSGTMP0, MSG
paddd 8*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP0, MSGTMP4
palignr $4, MSGTMP3, MSGTMP4
paddd MSGTMP4, MSGTMP1
sha256msg2 MSGTMP0, MSGTMP1
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP0, MSGTMP3
/* Rounds 36-39 */
movdqa MSGTMP1, MSG
paddd 9*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP1, MSGTMP4
palignr $4, MSGTMP0, MSGTMP4
paddd MSGTMP4, MSGTMP2
sha256msg2 MSGTMP1, MSGTMP2
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP1, MSGTMP0
/* Rounds 40-43 */
movdqa MSGTMP2, MSG
paddd 10*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP2, MSGTMP4
palignr $4, MSGTMP1, MSGTMP4
paddd MSGTMP4, MSGTMP3
sha256msg2 MSGTMP2, MSGTMP3
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP2, MSGTMP1
/* Rounds 44-47 */
movdqa MSGTMP3, MSG
paddd 11*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP3, MSGTMP4
palignr $4, MSGTMP2, MSGTMP4
paddd MSGTMP4, MSGTMP0
sha256msg2 MSGTMP3, MSGTMP0
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP3, MSGTMP2
/* Rounds 48-51 */
movdqa MSGTMP0, MSG
paddd 12*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP0, MSGTMP4
palignr $4, MSGTMP3, MSGTMP4
paddd MSGTMP4, MSGTMP1
sha256msg2 MSGTMP0, MSGTMP1
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
sha256msg1 MSGTMP0, MSGTMP3
/* Rounds 52-55 */
movdqa MSGTMP1, MSG
paddd 13*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP1, MSGTMP4
palignr $4, MSGTMP0, MSGTMP4
paddd MSGTMP4, MSGTMP2
sha256msg2 MSGTMP1, MSGTMP2
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
/* Rounds 56-59 */
movdqa MSGTMP2, MSG
paddd 14*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
movdqa MSGTMP2, MSGTMP4
palignr $4, MSGTMP1, MSGTMP4
paddd MSGTMP4, MSGTMP3
sha256msg2 MSGTMP2, MSGTMP3
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
/* Rounds 60-63 */
movdqa MSGTMP3, MSG
paddd 15*16(SHA256CONSTANTS), MSG
sha256rnds2 STATE0, STATE1
pshufd $0x0E, MSG, MSG
sha256rnds2 STATE1, STATE0
/* Add current hash values with previously saved */
paddd ABEF_SAVE, STATE0
paddd CDGH_SAVE, STATE1
/* Increment data pointer and loop if more to process */
add $64, DATA_PTR
cmp NUM_BLKS, DATA_PTR
jne .Lloop0
/* Write hash values back in the correct order */
pshufd $0x1B,
|