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diff --git a/wolfcrypt/src/fp_sqr_comba_12.i b/wolfcrypt/src/fp_sqr_comba_12.i
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+/* fp_sqr_comba_12.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_SQR12
+int fp_sqr_comba12(fp_int *A, fp_int *B)
+{
+   fp_digit *a, c0, c1, c2, sc0 = 0, sc1 = 0, sc2 = 0;
+#ifdef TFM_ISO
+   fp_word tt;
+#endif
+#ifndef WOLFSSL_SMALL_STACK
+   fp_digit b[24];
+#else
+   fp_digit *b;
+#endif
+
+#ifdef WOLFSSL_SMALL_STACK
+   b = (fp_digit*)XMALLOC(sizeof(fp_digit) * 24, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+   if (b == NULL)
+      return FP_MEM;
+#endif
+
+   a = A->dp;
+   COMBA_START; 
+
+   /* clear carries */
+   CLEAR_CARRY;
+
+   /* output 0 */
+   SQRADD(a[0],a[0]);
+   COMBA_STORE(b[0]);
+
+   /* output 1 */
+   CARRY_FORWARD;
+   SQRADD2(a[0], a[1]); 
+   COMBA_STORE(b[1]);
+
+   /* output 2 */
+   CARRY_FORWARD;
+   SQRADD2(a[0], a[2]); SQRADD(a[1], a[1]); 
+   COMBA_STORE(b[2]);
+
+   /* output 3 */
+   CARRY_FORWARD;
+   SQRADD2(a[0], a[3]); SQRADD2(a[1], a[2]); 
+   COMBA_STORE(b[3]);
+
+   /* output 4 */
+   CARRY_FORWARD;
+   SQRADD2(a[0], a[4]); SQRADD2(a[1], a[3]); SQRADD(a[2], a[2]); 
+   COMBA_STORE(b[4]);
+
+   /* output 5 */
+   CARRY_FORWARD;
+   SQRADDSC(a[0], a[5]); SQRADDAC(a[1], a[4]); SQRADDAC(a[2], a[3]); SQRADDDB; 
+   COMBA_STORE(b[5]);
+
+   /* output 6 */
+   CARRY_FORWARD;
+   SQRADDSC(a[0], a[6]); SQRADDAC(a[1], a[5]); SQRADDAC(a[2], a[4]); SQRADDDB; SQRADD(a[3], a[3]); 
+   COMBA_STORE(b[6]);
+
+   /* output 7 */
+   CARRY_FORWARD;
+   SQRADDSC(a[0], a[7]); SQRADDAC(a[1], a[6]); SQRADDAC(a[2], a[5]); SQRADDAC(a[3], a[4]); SQRADDDB; 
+   COMBA_STORE(b[7]);
+
+   /* output 8 */
+   CARRY_FORWARD;
+   SQRADDSC(a[0], a[8]); SQRADDAC(a[1], a[7]); SQRADDAC(a[2], a[6]); SQRADDAC(a[3], a[5]); SQRADDDB; SQRADD(a[4], a[4]); 
+   COMBA_STORE(b[8]);
+
+   /* output 9 */
+   CARRY_FORWARD;
+   SQRADDSC(a[0], a[9]); SQRADDAC(a[1], a[8]); SQRADDAC(a[2], a[7]); SQRADDAC(a[3], a[6]); SQRADDAC(a[4], a[5]); SQRADDDB; 
+   COMBA_STORE(b[9]);
+
+   /* output 10 */
+   CARRY_FORWARD;
+   SQRADDSC(a[0], a[10]); SQRADDAC(a[1], a[9]); SQRADDAC(a[2], a[8]); SQRADDAC(a[3], a[7]); SQRADDAC(a[4], a[6]); SQRADDDB; SQRADD(a[5], a[5]); 
+   COMBA_STORE(b[10]);
+
+   /* output 11 */
+   CARRY_FORWARD;
+   SQRADDSC(a[0], a[11]); SQRADDAC(a[1], a[10]); SQRADDAC(a[2], a[9]); SQRADDAC(a[3], a[8]); SQRADDAC(a[4], a[7]); SQRADDAC(a[5], a[6]); SQRADDDB; 
+   COMBA_STORE(b[11]);
+
+   /* output 12 */
+   CARRY_FORWARD;
+   SQRADDSC(a[1], a[11]); SQRADDAC(a[2], a[10]); SQRADDAC(a[3], a[9]); SQRADDAC(a[4], a[8]); SQRADDAC(a[5], a[7]); SQRADDDB; SQRADD(a[6], a[6]); 
+   COMBA_STORE(b[12]);
+
+   /* output 13 */
+   CARRY_FORWARD;
+   SQRADDSC(a[2], a[11]); SQRADDAC(a[3], a[10]); SQRADDAC(a[4], a[9]); SQRADDAC(a[5], a[8]); SQRADDAC(a[6], a[7]); SQRADDDB; 
+   COMBA_STORE(b[13]);
+
+   /* output 14 */
+   CARRY_FORWARD;
+   SQRADDSC(a[3], a[11]); SQRADDAC(a[4], a[10]); SQRADDAC(a[5], a[9]); SQRADDAC(a[6], a[8]); SQRADDDB; SQRADD(a[7], a[7]); 
+   COMBA_STORE(b[14]);
+
+   /* output 15 */
+   CARRY_FORWARD;
+   SQRADDSC(a[4], a[11]); SQRADDAC(a[5], a[10]); SQRADDAC(a[6], a[9]); SQRADDAC(a[7], a[8]); SQRADDDB; 
+   COMBA_STORE(b[15]);
+
+   /* output 16 */
+   CARRY_FORWARD;
+   SQRADDSC(a[5], a[11]); SQRADDAC(a[6], a[10]); SQRADDAC(a[7], a[9]); SQRADDDB; SQRADD(a[8], a[8]); 
+   COMBA_STORE(b[16]);
+
+   /* output 17 */
+   CARRY_FORWARD;
+   SQRADDSC(a[6], a[11]); SQRADDAC(a[7], a[10]); SQRADDAC(a[8], a[9]); SQRADDDB; 
+   COMBA_STORE(b[17]);
+
+   /* output 18 */
+   CARRY_FORWARD;
+   SQRADD2(a[7], a[11]); SQRADD2(a[8], a[10]); SQRADD(a[9], a[9]); 
+   COMBA_STORE(b[18]);
+
+   /* output 19 */
+   CARRY_FORWARD;
+   SQRADD2(a[8], a[11]); SQRADD2(a[9], a[10]); 
+   COMBA_STORE(b[19]);
+
+   /* output 20 */
+   CARRY_FORWARD;
+   SQRADD2(a[9], a[11]); SQRADD(a[10], a[10]); 
+   COMBA_STORE(b[20]);
+
+   /* output 21 */
+   CARRY_FORWARD;
+   SQRADD2(a[10], a[11]); 
+   COMBA_STORE(b[21]);
+
+   /* output 22 */
+   CARRY_FORWARD;
+   SQRADD(a[11], a[11]); 
+   COMBA_STORE(b[22]);
+   COMBA_STORE2(b[23]);
+   COMBA_FINI;
+
+   B->used = 24;
+   B->sign = FP_ZPOS;
+   XMEMCPY(B->dp, b, 24 * sizeof(fp_digit));
+   fp_clamp(B);
+
+#ifdef WOLFSSL_SMALL_STACK
+   XFREE(b, NULL, DYNAMIC_TYPE_TMP_BUFFER);
+#endif
+   return FP_OKAY;
+}
+#endif
+
+