Add libgmp 6.2.0 to third_party
Don't build it yet. That will come in the next review.
Change-Id: Idf3266558165e5ab45f4a41c98cc8c838c8244d5
diff --git a/third_party/gmp/mpf/random2.c b/third_party/gmp/mpf/random2.c
new file mode 100644
index 0000000..2e0163c
--- /dev/null
+++ b/third_party/gmp/mpf/random2.c
@@ -0,0 +1,66 @@
+/* mpf_random2 -- Generate a positive random mpf_t of specified size, with
+ long runs of consecutive ones and zeros in the binary representation.
+ Intended for testing of other MP routines.
+
+Copyright 1995, 1996, 2001-2003 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of either:
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your
+ option) any later version.
+
+or
+
+ * 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.
+
+or both in parallel, as here.
+
+The GNU MP Library 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 copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library. If not,
+see https://www.gnu.org/licenses/. */
+
+#include "gmp-impl.h"
+
+
+void
+mpf_random2 (mpf_ptr x, mp_size_t xs, mp_exp_t exp)
+{
+ mp_size_t xn;
+ mp_size_t prec;
+ mp_limb_t elimb;
+
+ xn = ABS (xs);
+ prec = PREC(x);
+
+ if (xn == 0)
+ {
+ EXP(x) = 0;
+ SIZ(x) = 0;
+ return;
+ }
+
+ if (xn > prec + 1)
+ xn = prec + 1;
+
+ /* General random mantissa. */
+ mpn_random2 (PTR(x), xn);
+
+ /* Generate random exponent. */
+ _gmp_rand (&elimb, RANDS, GMP_NUMB_BITS);
+ exp = ABS (exp);
+ exp = elimb % (2 * exp + 1) - exp;
+
+ EXP(x) = exp;
+ SIZ(x) = xs < 0 ? -xn : xn;
+}