mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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94aa31c3cb
* deleted old version wolfSSL before updating * updated wolfSSL to the latest version(v4.4.0) * updated wolfSSL to the latest version(v4.4.0) * added macros for timing resistance Co-authored-by: RichardBarry <3073890+RichardBarry@users.noreply.github.com> Co-authored-by: Ming Yue <mingyue86010@gmail.com>
83 lines
2.2 KiB
OpenEdge ABL
83 lines
2.2 KiB
OpenEdge ABL
/* fp_mul_comba_4.i
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*
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* Copyright (C) 2006-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL 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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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifdef TFM_MUL4
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int fp_mul_comba4(fp_int *A, fp_int *B, fp_int *C)
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{
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fp_digit c0, c1, c2;
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#ifndef WOLFSSL_SMALL_STACK
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fp_digit at[8];
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#else
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fp_digit *at;
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#endif
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#ifdef WOLFSSL_SMALL_STACK
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at = (fp_digit*)XMALLOC(sizeof(fp_digit) * 8, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if (at == NULL)
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return FP_MEM;
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#endif
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XMEMCPY(at, A->dp, 4 * sizeof(fp_digit));
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XMEMCPY(at+4, B->dp, 4 * sizeof(fp_digit));
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COMBA_START;
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COMBA_CLEAR;
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/* 0 */
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MULADD(at[0], at[4]);
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COMBA_STORE(C->dp[0]);
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/* 1 */
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COMBA_FORWARD;
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MULADD(at[0], at[5]); MULADD(at[1], at[4]);
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COMBA_STORE(C->dp[1]);
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/* 2 */
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COMBA_FORWARD;
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MULADD(at[0], at[6]); MULADD(at[1], at[5]); MULADD(at[2], at[4]);
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COMBA_STORE(C->dp[2]);
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/* 3 */
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COMBA_FORWARD;
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MULADD(at[0], at[7]); MULADD(at[1], at[6]); MULADD(at[2], at[5]); MULADD(at[3], at[4]);
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COMBA_STORE(C->dp[3]);
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/* 4 */
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COMBA_FORWARD;
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MULADD(at[1], at[7]); MULADD(at[2], at[6]); MULADD(at[3], at[5]);
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COMBA_STORE(C->dp[4]);
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/* 5 */
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COMBA_FORWARD;
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MULADD(at[2], at[7]); MULADD(at[3], at[6]);
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COMBA_STORE(C->dp[5]);
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/* 6 */
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COMBA_FORWARD;
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MULADD(at[3], at[7]);
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COMBA_STORE(C->dp[6]);
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COMBA_STORE2(C->dp[7]);
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C->used = 8;
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C->sign = A->sign ^ B->sign;
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fp_clamp(C);
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COMBA_FINI;
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(at, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return FP_OKAY;
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}
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#endif
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