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/tests/refmpq.c b/third_party/gmp/tests/refmpq.c
new file mode 100644
index 0000000..8a2fc7a
--- /dev/null
+++ b/third_party/gmp/tests/refmpq.c
@@ -0,0 +1,40 @@
+/* Reference rational routines.
+
+Copyright 2001 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library test suite.
+
+The GNU MP Library test suite 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 3 of the License,
+or (at your option) any later version.
+
+The GNU MP Library test suite 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
+the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
+
+#include "gmp-impl.h"
+#include "tests.h"
+
+
+void
+refmpq_add (mpq_ptr w, mpq_srcptr x, mpq_srcptr y)
+{
+ mpz_mul (mpq_numref(w), mpq_numref(x), mpq_denref(y));
+ mpz_addmul (mpq_numref(w), mpq_denref(x), mpq_numref(y));
+ mpz_mul (mpq_denref(w), mpq_denref(x), mpq_denref(y));
+ mpq_canonicalize (w);
+}
+
+void
+refmpq_sub (mpq_ptr w, mpq_srcptr x, mpq_srcptr y)
+{
+ mpz_mul (mpq_numref(w), mpq_numref(x), mpq_denref(y));
+ mpz_submul (mpq_numref(w), mpq_denref(x), mpq_numref(y));
+ mpz_mul (mpq_denref(w), mpq_denref(x), mpq_denref(y));
+ mpq_canonicalize (w);
+}