1 files changed, 99 insertions, 0 deletions
diff --git a/wolfcrypt/src/fp_mul_comba_6.i b/wolfcrypt/src/fp_mul_comba_6.i
new file mode 100644
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+++ b/wolfcrypt/src/fp_mul_comba_6.i
@@ -0,0 +1,99 @@
+/* fp_mul_comba_6.i
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL 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.
+ *
+ * wolfSSL 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 02110-1335, USA
+ */
+
+
+
+#ifdef TFM_MUL6
+int fp_mul_comba6(fp_int *A, fp_int *B, fp_int *C)
+{
+   fp_digit c0, c1, c2;
+#ifndef WOLFSSL_SMALL_STACK
+   fp_digit at[12];
+#else
+   fp_digit *at;
+#endif
+
+#ifdef WOLFSSL_SMALL_STACK
+   at = (fp_digit*)XMALLOC(sizeof(fp_digit) * 12, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+   if (at == NULL)
+       return FP_MEM;
+#endif
+
+   XMEMCPY(at, A->dp, 6 * sizeof(fp_digit));
+   XMEMCPY(at+6, B->dp, 6 * sizeof(fp_digit));
+   COMBA_START;
+
+   COMBA_CLEAR;
+   /* 0 */
+   MULADD(at[0], at[6]); 
+   COMBA_STORE(C->dp[0]);
+   /* 1 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[7]);    MULADD(at[1], at[6]); 
+   COMBA_STORE(C->dp[1]);
+   /* 2 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[8]);    MULADD(at[1], at[7]);    MULADD(at[2], at[6]); 
+   COMBA_STORE(C->dp[2]);
+   /* 3 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[9]);    MULADD(at[1], at[8]);    MULADD(at[2], at[7]);    MULADD(at[3], at[6]); 
+   COMBA_STORE(C->dp[3]);
+   /* 4 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[10]);    MULADD(at[1], at[9]);    MULADD(at[2], at[8]);    MULADD(at[3], at[7]);    MULADD(at[4], at[6]); 
+   COMBA_STORE(C->dp[4]);
+   /* 5 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[11]);    MULADD(at[1], at[10]);    MULADD(at[2], at[9]);    MULADD(at[3], at[8]);    MULADD(at[4], at[7]);    MULADD(at[5], at[6]); 
+   COMBA_STORE(C->dp[5]);
+   /* 6 */
+   COMBA_FORWARD;
+   MULADD(at[1], at[11]);    MULADD(at[2], at[10]);    MULADD(at[3], at[9]);    MULADD(at[4], at[8]);    MULADD(at[5], at[7]); 
+   COMBA_STORE(C->dp[6]);
+   /* 7 */
+   COMBA_FORWARD;
+   MULADD(at[2], at[11]);    MULADD(at[3], at[10]);    MULADD(at[4], at[9]);    MULADD(at[5], at[8]); 
+   COMBA_STORE(C->dp[7]);
+   /* 8 */
+   COMBA_FORWARD;
+   MULADD(at[3], at[11]);    MULADD(at[4], at[10]);    MULADD(at[5], at[9]); 
+   COMBA_STORE(C->dp[8]);
+   /* 9 */
+   COMBA_FORWARD;
+   MULADD(at[4], at[11]);    MULADD(at[5], at[10]); 
+   COMBA_STORE(C->dp[9]);
+   /* 10 */
+   COMBA_FORWARD;
+   MULADD(at[5], at[11]); 
+   COMBA_STORE(C->dp[10]);
+   COMBA_STORE2(C->dp[11]);
+   C->used = 12;
+   C->sign = A->sign ^ B->sign;
+   fp_clamp(C);
+   COMBA_FINI;
+
+#ifdef WOLFSSL_SMALL_STACK
+   XFREE(at, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+#endif
+   return FP_OKAY;
+}
+#endif