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/*-
* Copyright (c) 2021 The FreeBSD Foundation
*
* This software was developed by Andrew Turner under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
#include <sys/types.h>
#include <arm_neon.h>
#include "sha256c_impl.h"
void __hidden
SHA256_Transform_arm64_impl(uint32_t * state, const unsigned char block[64],
const uint32_t K[64])
{
uint32x4_t W[4];
uint32x4_t S[2];
uint32x4_t S_start[2];
uint32x4_t K_tmp, S_tmp;
int i;
#define A64_LOAD_W(x) \
W[x] = vld1q_u32((const uint32_t *)(&block[(x) * 16])); \
W[x] = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(W[x])))
/* 1. Prepare the first part of the message schedule W. */
A64_LOAD_W(0);
A64_LOAD_W(1);
A64_LOAD_W(2);
A64_LOAD_W(3);
/* 2. Initialize working variables. */
S[0] = vld1q_u32(&state[0]);
S[1] = vld1q_u32(&state[4]);
S_start[0] = S[0];
S_start[1] = S[1];
/* 3. Mix. */
for (i = 0; i < 64; i += 16) {
#define A64_RNDr(i, ii) \
K_tmp = vaddq_u32(W[i], vld1q_u32(&K[ii + i * 4])); \
S_tmp = vsha256hq_u32(S[0], S[1], K_tmp); \
S[1] = vsha256h2q_u32(S[1], S[0], K_tmp); \
S[0] = S_tmp
A64_RNDr(0, i);
A64_RNDr(1, i);
A64_RNDr(2, i);
A64_RNDr(3, i);
if (i == 48)
break;
#define A64_MSCH(x) \
W[x] = vsha256su0q_u32(W[x], W[(x + 1) % 4]); \
W[x] = vsha256su1q_u32(W[x], W[(x + 2) % 4], W[(x + 3) % 4])
A64_MSCH(0);
A64_MSCH(1);
A64_MSCH(2);
A64_MSCH(3);
}
/* 4. Mix local working variables into global state */
S[0] = vaddq_u32(S[0], S_start[0]);
S[1] = vaddq_u32(S[1], S_start[1]);
vst1q_u32(&state[0], S[0]);
vst1q_u32(&state[4], S[1]);
}
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