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/abs.c b/third_party/gmp/mpf/abs.c
new file mode 100644
index 0000000..1642a46
--- /dev/null
+++ b/third_party/gmp/mpf/abs.c
@@ -0,0 +1,58 @@
+/* mpf_abs -- Compute the absolute value of a float.
+
+Copyright 1993-1995, 2001 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_abs (mpf_ptr r, mpf_srcptr u)
+{
+ mp_size_t size;
+
+ size = ABS (u->_mp_size);
+ if (r != u)
+ {
+ mp_size_t prec;
+ mp_ptr rp, up;
+
+ prec = r->_mp_prec + 1; /* lie not to lose precision in assignment */
+ rp = r->_mp_d;
+ up = u->_mp_d;
+
+ if (size > prec)
+ {
+ up += size - prec;
+ size = prec;
+ }
+
+ MPN_COPY (rp, up, size);
+ r->_mp_exp = u->_mp_exp;
+ }
+ r->_mp_size = size;
+}