303 lines
7.6 KiB
ArmAsm
303 lines
7.6 KiB
ArmAsm
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/*
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* Intel SHA Extensions optimized implementation of a SHA-1 update function
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2015 Intel Corporation.
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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 version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Contact Information:
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* Sean Gulley <sean.m.gulley@intel.com>
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* Tim Chen <tim.c.chen@linux.intel.com>
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*
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* BSD LICENSE
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*
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* Copyright(c) 2015 Intel Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <linux/linkage.h>
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#define DIGEST_PTR %rdi /* 1st arg */
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#define DATA_PTR %rsi /* 2nd arg */
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#define NUM_BLKS %rdx /* 3rd arg */
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#define RSPSAVE %rax
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/* gcc conversion */
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#define FRAME_SIZE 32 /* space for 2x16 bytes */
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#define ABCD %xmm0
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#define E0 %xmm1 /* Need two E's b/c they ping pong */
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#define E1 %xmm2
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#define MSG0 %xmm3
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#define MSG1 %xmm4
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#define MSG2 %xmm5
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#define MSG3 %xmm6
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#define SHUF_MASK %xmm7
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/*
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* Intel SHA Extensions optimized implementation of a SHA-1 update function
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*
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* The function takes a pointer to the current hash values, a pointer to the
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* input data, and a number of 64 byte blocks to process. Once all blocks have
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* been processed, the digest pointer is updated with the resulting hash value.
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* The function only processes complete blocks, there is no functionality to
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* store partial blocks. All message padding and hash value initialization must
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* be done outside the update function.
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*
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* The indented lines in the loop are instructions related to rounds processing.
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* The non-indented lines are instructions related to the message schedule.
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*
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* void sha1_ni_transform(uint32_t *digest, const void *data,
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uint32_t numBlocks)
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* digest : pointer to digest
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* data: pointer to input data
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* numBlocks: Number of blocks to process
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*/
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.text
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.align 32
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ENTRY(sha1_ni_transform)
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mov %rsp, RSPSAVE
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sub $FRAME_SIZE, %rsp
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and $~0xF, %rsp
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shl $6, NUM_BLKS /* convert to bytes */
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jz .Ldone_hash
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add DATA_PTR, NUM_BLKS /* pointer to end of data */
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/* load initial hash values */
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pinsrd $3, 1*16(DIGEST_PTR), E0
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movdqu 0*16(DIGEST_PTR), ABCD
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pand UPPER_WORD_MASK(%rip), E0
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pshufd $0x1B, ABCD, ABCD
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movdqa PSHUFFLE_BYTE_FLIP_MASK(%rip), SHUF_MASK
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.Lloop0:
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/* Save hash values for addition after rounds */
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movdqa E0, (0*16)(%rsp)
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movdqa ABCD, (1*16)(%rsp)
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/* Rounds 0-3 */
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movdqu 0*16(DATA_PTR), MSG0
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pshufb SHUF_MASK, MSG0
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paddd MSG0, E0
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movdqa ABCD, E1
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sha1rnds4 $0, E0, ABCD
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/* Rounds 4-7 */
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movdqu 1*16(DATA_PTR), MSG1
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pshufb SHUF_MASK, MSG1
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sha1nexte MSG1, E1
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movdqa ABCD, E0
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sha1rnds4 $0, E1, ABCD
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sha1msg1 MSG1, MSG0
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/* Rounds 8-11 */
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movdqu 2*16(DATA_PTR), MSG2
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pshufb SHUF_MASK, MSG2
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sha1nexte MSG2, E0
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movdqa ABCD, E1
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sha1rnds4 $0, E0, ABCD
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sha1msg1 MSG2, MSG1
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pxor MSG2, MSG0
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/* Rounds 12-15 */
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movdqu 3*16(DATA_PTR), MSG3
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pshufb SHUF_MASK, MSG3
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sha1nexte MSG3, E1
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movdqa ABCD, E0
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sha1msg2 MSG3, MSG0
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sha1rnds4 $0, E1, ABCD
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sha1msg1 MSG3, MSG2
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pxor MSG3, MSG1
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/* Rounds 16-19 */
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sha1nexte MSG0, E0
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movdqa ABCD, E1
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sha1msg2 MSG0, MSG1
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sha1rnds4 $0, E0, ABCD
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sha1msg1 MSG0, MSG3
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pxor MSG0, MSG2
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/* Rounds 20-23 */
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sha1nexte MSG1, E1
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movdqa ABCD, E0
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sha1msg2 MSG1, MSG2
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sha1rnds4 $1, E1, ABCD
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sha1msg1 MSG1, MSG0
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pxor MSG1, MSG3
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/* Rounds 24-27 */
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sha1nexte MSG2, E0
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movdqa ABCD, E1
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sha1msg2 MSG2, MSG3
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sha1rnds4 $1, E0, ABCD
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sha1msg1 MSG2, MSG1
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pxor MSG2, MSG0
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/* Rounds 28-31 */
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sha1nexte MSG3, E1
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movdqa ABCD, E0
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sha1msg2 MSG3, MSG0
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sha1rnds4 $1, E1, ABCD
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sha1msg1 MSG3, MSG2
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pxor MSG3, MSG1
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/* Rounds 32-35 */
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sha1nexte MSG0, E0
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movdqa ABCD, E1
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sha1msg2 MSG0, MSG1
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sha1rnds4 $1, E0, ABCD
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sha1msg1 MSG0, MSG3
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pxor MSG0, MSG2
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/* Rounds 36-39 */
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sha1nexte MSG1, E1
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movdqa ABCD, E0
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sha1msg2 MSG1, MSG2
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sha1rnds4 $1, E1, ABCD
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sha1msg1 MSG1, MSG0
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pxor MSG1, MSG3
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/* Rounds 40-43 */
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sha1nexte MSG2, E0
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movdqa ABCD, E1
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sha1msg2 MSG2, MSG3
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sha1rnds4 $2, E0, ABCD
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sha1msg1 MSG2, MSG1
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pxor MSG2, MSG0
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/* Rounds 44-47 */
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sha1nexte MSG3, E1
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movdqa ABCD, E0
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sha1msg2 MSG3, MSG0
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sha1rnds4 $2, E1, ABCD
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sha1msg1 MSG3, MSG2
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pxor MSG3, MSG1
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/* Rounds 48-51 */
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sha1nexte MSG0, E0
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movdqa ABCD, E1
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sha1msg2 MSG0, MSG1
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sha1rnds4 $2, E0, ABCD
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sha1msg1 MSG0, MSG3
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pxor MSG0, MSG2
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/* Rounds 52-55 */
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sha1nexte MSG1, E1
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movdqa ABCD, E0
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sha1msg2 MSG1, MSG2
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sha1rnds4 $2, E1, ABCD
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sha1msg1 MSG1, MSG0
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pxor MSG1, MSG3
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/* Rounds 56-59 */
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sha1nexte MSG2, E0
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movdqa ABCD, E1
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sha1msg2 MSG2, MSG3
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sha1rnds4 $2, E0, ABCD
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sha1msg1 MSG2, MSG1
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pxor MSG2, MSG0
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/* Rounds 60-63 */
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sha1nexte MSG3, E1
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movdqa ABCD, E0
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sha1msg2 MSG3, MSG0
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sha1rnds4 $3, E1, ABCD
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sha1msg1 MSG3, MSG2
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pxor MSG3, MSG1
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/* Rounds 64-67 */
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sha1nexte MSG0, E0
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movdqa ABCD, E1
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sha1msg2 MSG0, MSG1
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sha1rnds4 $3, E0, ABCD
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sha1msg1 MSG0, MSG3
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pxor MSG0, MSG2
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/* Rounds 68-71 */
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sha1nexte MSG1, E1
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movdqa ABCD, E0
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sha1msg2 MSG1, MSG2
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sha1rnds4 $3, E1, ABCD
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pxor MSG1, MSG3
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/* Rounds 72-75 */
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sha1nexte MSG2, E0
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movdqa ABCD, E1
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sha1msg2 MSG2, MSG3
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sha1rnds4 $3, E0, ABCD
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/* Rounds 76-79 */
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sha1nexte MSG3, E1
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movdqa ABCD, E0
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sha1rnds4 $3, E1, ABCD
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/* Add current hash values with previously saved */
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sha1nexte (0*16)(%rsp), E0
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paddd (1*16)(%rsp), ABCD
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/* Increment data pointer and loop if more to process */
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add $64, DATA_PTR
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cmp NUM_BLKS, DATA_PTR
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jne .Lloop0
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/* Write hash values back in the correct order */
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pshufd $0x1B, ABCD, ABCD
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movdqu ABCD, 0*16(DIGEST_PTR)
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pextrd $3, E0, 1*16(DIGEST_PTR)
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.Ldone_hash:
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mov RSPSAVE, %rsp
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ret
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ENDPROC(sha1_ni_transform)
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.data
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.align 64
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PSHUFFLE_BYTE_FLIP_MASK:
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.octa 0x000102030405060708090a0b0c0d0e0f
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UPPER_WORD_MASK:
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.octa 0xFFFFFFFF000000000000000000000000
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