--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/3rdparty/libtommath/bn_mp_sqr.c	Tue May 08 16:09:12 2018 +0900
@@ -0,0 +1,60 @@
+#include <tommath_private.h>
+#ifdef BN_MP_SQR_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
+ */
+
+/* computes b = a*a */
+int
+mp_sqr (mp_int * a, mp_int * b)
+{
+  int     res;
+
+#ifdef BN_MP_TOOM_SQR_C
+  /* use Toom-Cook? */
+  if (a->used >= TOOM_SQR_CUTOFF) {
+    res = mp_toom_sqr(a, b);
+  /* Karatsuba? */
+  } else 
+#endif
+#ifdef BN_MP_KARATSUBA_SQR_C
+  if (a->used >= KARATSUBA_SQR_CUTOFF) {
+    res = mp_karatsuba_sqr (a, b);
+  } else 
+#endif
+  {
+#ifdef BN_FAST_S_MP_SQR_C
+    /* can we use the fast comba multiplier? */
+    if ((((a->used * 2) + 1) < MP_WARRAY) &&
+         (a->used <
+         (1 << (((sizeof(mp_word) * CHAR_BIT) - (2 * DIGIT_BIT)) - 1)))) {
+      res = fast_s_mp_sqr (a, b);
+    } else
+#endif
+    {
+#ifdef BN_S_MP_SQR_C
+      res = s_mp_sqr (a, b);
+#else
+      res = MP_VAL;
+#endif
+    }
+  }
+  b->sign = MP_ZPOS;
+  return res;
+}
+#endif
+
+/* $Source$ */
+/* $Revision$ */
+/* $Date$ */