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/cmp_d.c b/third_party/gmp/mpf/cmp_d.c
new file mode 100644
index 0000000..3fa099b
--- /dev/null
+++ b/third_party/gmp/mpf/cmp_d.c
@@ -0,0 +1,59 @@
+/* mpf_cmp_d -- compare mpf and double.
+
+Copyright 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 "config.h"
+
+#if HAVE_FLOAT_H
+#include <float.h> /* for DBL_MAX */
+#endif
+
+#include "gmp-impl.h"
+
+int
+mpf_cmp_d (mpf_srcptr f, double d)
+{
+ mp_limb_t darray[LIMBS_PER_DOUBLE];
+ mpf_t df;
+
+ /* d=NaN has no sensible return value, so raise an exception.
+ d=Inf or -Inf is always bigger than z. */
+ DOUBLE_NAN_INF_ACTION (d,
+ __gmp_invalid_operation (),
+ return (d < 0.0 ? 1 : -1));
+
+ if (d == 0.0)
+ return SIZ(f);
+
+ PTR(df) = darray;
+ SIZ(df) = (d >= 0.0 ? LIMBS_PER_DOUBLE : -LIMBS_PER_DOUBLE);
+ EXP(df) = __gmp_extract_double (darray, ABS(d));
+
+ return mpf_cmp (f, df);
+}