1 files changed, 52 insertions, 0 deletions
diff --git a/contrib/libgmp/mpf/reldiff.c b/contrib/libgmp/mpf/reldiff.c
new file mode 100644
index 0000000..c846466
--- /dev/null
+++ b/contrib/libgmp/mpf/reldiff.c
@@ -0,0 +1,52 @@
+/* mpf_reldiff -- Generate the relative difference of two floats.
+
+Copyright (C) 1996 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 the GNU Library General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at your
+option) any later version.
+
+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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+void
+#if __STDC__
+mpf_reldiff (mpf_t rdiff, mpf_srcptr x, mpf_srcptr y)
+#else
+mpf_reldiff (rdiff, x, y)
+     mpf_t rdiff;
+     mpf_srcptr x;
+     mpf_srcptr y;
+#endif
+{
+  if (mpf_cmp_ui (x, 0) == 0)
+    {
+      mpf_set_ui (rdiff, (unsigned long int) (mpf_sgn (y) != 0));
+    }
+  else
+    {
+      mpf_t d;
+      mp_limb_t tmp_limb[2];
+
+      d->_mp_prec = 1;
+      d->_mp_d = tmp_limb;
+
+      mpf_sub (d, x, y);
+      mpf_abs (d, d);
+      mpf_div (rdiff, d, x);
+    }
+}
+