Donatien Garnier / MiniTLS-GPL

A super trimmed down TLS stack, GPL licensed

Dependents:   MiniTLS-HTTPS-Example

MiniTLS - A super trimmed down TLS/SSL Library for embedded devices Author: Donatien Garnier Copyright (C) 2013-2014 AppNearMe Ltd

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

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.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

math/mul/fp_mul_comba_3.c

Committer:
MiniTLS
Date:
2014-06-10
Revision:
4:cbaf466d717d
Parent:
0:35aa5be3b78d

File content as of revision 4:cbaf466d717d:

#define TFM_DEFINES
#include "fp_mul_comba.c"

#ifdef TFM_MUL3
void fp_mul_comba3(fp_int *A, fp_int *B, fp_int *C)
{
   fp_digit c0, c1, c2, at[6];

   memcpy(at, A->dp, 3 * sizeof(fp_digit));
   memcpy(at+3, B->dp, 3 * sizeof(fp_digit));
   COMBA_START;

   COMBA_CLEAR;
   /* 0 */
   MULADD(at[0], at[3]); 
   COMBA_STORE(C->dp[0]);
   /* 1 */
   COMBA_FORWARD;
   MULADD(at[0], at[4]);    MULADD(at[1], at[3]); 
   COMBA_STORE(C->dp[1]);
   /* 2 */
   COMBA_FORWARD;
   MULADD(at[0], at[5]);    MULADD(at[1], at[4]);    MULADD(at[2], at[3]); 
   COMBA_STORE(C->dp[2]);
   /* 3 */
   COMBA_FORWARD;
   MULADD(at[1], at[5]);    MULADD(at[2], at[4]); 
   COMBA_STORE(C->dp[3]);
   /* 4 */
   COMBA_FORWARD;
   MULADD(at[2], at[5]); 
   COMBA_STORE(C->dp[4]);
   COMBA_STORE2(C->dp[5]);
   C->used = 6;
   C->sign = A->sign ^ B->sign;
   fp_clamp(C);
   COMBA_FINI;
}
#endif