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/mpz/fib2_ui.c b/third_party/gmp/mpz/fib2_ui.c
new file mode 100644
index 0000000..ea26227
--- /dev/null
+++ b/third_party/gmp/mpz/fib2_ui.c
@@ -0,0 +1,58 @@
+/* mpz_fib2_ui -- calculate Fibonacci numbers.
+
+Copyright 2001, 2012, 2014, 2015 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 <stdio.h>
+#include "gmp-impl.h"
+
+
+void
+mpz_fib2_ui (mpz_ptr fn, mpz_ptr fnsub1, unsigned long n)
+{
+ mp_ptr fp, f1p;
+ mp_size_t size;
+
+ if (n <= FIB_TABLE_LIMIT)
+ {
+ MPZ_NEWALLOC (fn, 1)[0] = FIB_TABLE (n);
+ SIZ(fn) = (n != 0); /* F[0]==0, others are !=0 */
+ MPZ_NEWALLOC (fnsub1, 1)[0] = FIB_TABLE ((int) n - 1);
+ SIZ(fnsub1) = (n != 1); /* F[1-1]==0, others are !=0 */
+ return;
+ }
+
+ size = MPN_FIB2_SIZE (n);
+ fp = MPZ_NEWALLOC (fn, size);
+ f1p = MPZ_NEWALLOC (fnsub1, size);
+
+ size = mpn_fib2_ui (fp, f1p, n);
+
+ SIZ(fn) = size;
+ SIZ(fnsub1) = size - (f1p[size-1] == 0);
+}