02cca1987b
Change-Id: I7fb9b06ec89ba11641454145708e157359b07cf0 Reviewed-on: https://boringssl-review.googlesource.com/25924 Commit-Queue: David Benjamin <davidben@google.com> CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> Reviewed-by: Steven Valdez <svaldez@google.com>
225 lines
7.5 KiB
C
225 lines
7.5 KiB
C
/*
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* Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2012, Intel Corporation. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*
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* Originally written by Shay Gueron (1, 2), and Vlad Krasnov (1)
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* (1) Intel Corporation, Israel Development Center, Haifa, Israel
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* (2) University of Haifa, Israel
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*/
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#include <openssl/base.h>
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#if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_X86_64)
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#include "rsaz_exp.h"
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#include <openssl/mem.h>
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#include "../../internal.h"
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// See crypto/bn/asm/rsaz-avx2.pl for further details.
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void rsaz_1024_norm2red_avx2(void *red, const void *norm);
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void rsaz_1024_mul_avx2(void *ret, const void *a, const void *b, const void *n,
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BN_ULONG k);
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void rsaz_1024_sqr_avx2(void *ret, const void *a, const void *n, BN_ULONG k,
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int cnt);
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void rsaz_1024_scatter5_avx2(void *tbl, const void *val, int i);
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void rsaz_1024_gather5_avx2(void *val, const void *tbl, int i);
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void rsaz_1024_red2norm_avx2(void *norm, const void *red);
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alignas(64) static const BN_ULONG one[40] = {
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1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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alignas(64) static const BN_ULONG two80[40] = {
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0, 0, 1 << 22, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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void RSAZ_1024_mod_exp_avx2(BN_ULONG result_norm[16],
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const BN_ULONG base_norm[16], const BN_ULONG exponent[16],
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const BN_ULONG m_norm[16], const BN_ULONG RR[16], BN_ULONG k0) {
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alignas(64) uint8_t storage[(320 * 3) + (32 * 9 * 16)]; // 5.5KB
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unsigned char *a_inv, *m, *result, *table_s = storage + (320 * 3),
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*R2 = table_s; // borrow
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if (((((uintptr_t)storage & 4095) + 320) >> 12) != 0) {
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result = storage;
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a_inv = storage + 320;
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m = storage + (320 * 2); // should not cross page
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} else {
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m = storage; // should not cross page
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result = storage + 320;
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a_inv = storage + (320 * 2);
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}
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rsaz_1024_norm2red_avx2(m, m_norm);
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rsaz_1024_norm2red_avx2(a_inv, base_norm);
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rsaz_1024_norm2red_avx2(R2, RR);
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rsaz_1024_mul_avx2(R2, R2, R2, m, k0);
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rsaz_1024_mul_avx2(R2, R2, two80, m, k0);
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// table[0] = 1
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rsaz_1024_mul_avx2(result, R2, one, m, k0);
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// table[1] = a_inv^1
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rsaz_1024_mul_avx2(a_inv, a_inv, R2, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 0);
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rsaz_1024_scatter5_avx2(table_s, a_inv, 1);
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// table[2] = a_inv^2
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rsaz_1024_sqr_avx2(result, a_inv, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 2);
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#if 0
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// this is almost 2x smaller and less than 1% slower
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for (int index = 3; index < 32; index++) {
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, index);
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}
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#else
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// table[4] = a_inv^4
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 4);
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// table[8] = a_inv^8
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 8);
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// table[16] = a_inv^16
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 16);
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// table[17] = a_inv^17
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 17);
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// table[3]
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rsaz_1024_gather5_avx2(result, table_s, 2);
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 3);
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// table[6]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 6);
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// table[12]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 12);
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// table[24]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 24);
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// table[25]
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 25);
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// table[5]
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rsaz_1024_gather5_avx2(result, table_s, 4);
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 5);
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// table[10]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 10);
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// table[20]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 20);
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// table[21]
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 21);
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// table[7]
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rsaz_1024_gather5_avx2(result, table_s, 6);
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 7);
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// table[14]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 14);
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// table[28]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 28);
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// table[29]
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 29);
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// table[9]
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rsaz_1024_gather5_avx2(result, table_s, 8);
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 9);
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// table[18]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 18);
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// table[19]
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 19);
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// table[11]
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rsaz_1024_gather5_avx2(result, table_s, 10);
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 11);
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// table[22]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 22);
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// table[23]
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 23);
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// table[13]
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rsaz_1024_gather5_avx2(result, table_s, 12);
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 13);
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// table[26]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 26);
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// table[27]
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 27);
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// table[15]
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rsaz_1024_gather5_avx2(result, table_s, 14);
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 15);
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// table[30]
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rsaz_1024_sqr_avx2(result, result, m, k0, 1);
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rsaz_1024_scatter5_avx2(table_s, result, 30);
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// table[31]
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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rsaz_1024_scatter5_avx2(table_s, result, 31);
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#endif
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const uint8_t *p_str = (const uint8_t *)exponent;
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// load first window
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int wvalue = p_str[127] >> 3;
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rsaz_1024_gather5_avx2(result, table_s, wvalue);
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int index = 1014;
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while (index > -1) { // loop for the remaining 127 windows
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rsaz_1024_sqr_avx2(result, result, m, k0, 5);
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uint16_t wvalue_16;
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memcpy(&wvalue_16, &p_str[index / 8], sizeof(wvalue_16));
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wvalue = wvalue_16;
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wvalue = (wvalue >> (index % 8)) & 31;
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index -= 5;
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rsaz_1024_gather5_avx2(a_inv, table_s, wvalue); // borrow a_inv
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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}
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// square four times
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rsaz_1024_sqr_avx2(result, result, m, k0, 4);
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wvalue = p_str[0] & 15;
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rsaz_1024_gather5_avx2(a_inv, table_s, wvalue); // borrow a_inv
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rsaz_1024_mul_avx2(result, result, a_inv, m, k0);
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// from Montgomery
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rsaz_1024_mul_avx2(result, result, one, m, k0);
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rsaz_1024_red2norm_avx2(result_norm, result);
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OPENSSL_cleanse(storage, sizeof(storage));
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}
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#endif // OPENSSL_X86_64
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