Imported gcc-4.4.3

[msp430-gcc.git] / mpfr / neg.c

diff --git a/mpfr/neg.c b/mpfr/neg.c
new file mode 100644 (file)
index 0000000..cc9e109
--- /dev/null
+++ b/mpfr/neg.c
@@ -0,0 +1,39 @@
+/* mpfr_neg -- change the sign of a floating-point number
+
+Copyright 1999, 2000, 2001, 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at your
+option) any later version.
+
+The GNU MPFR 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+MA 02110-1301, USA. */
+
+#include "mpfr-impl.h"
+
+int
+mpfr_neg (mpfr_ptr a, mpfr_srcptr b, mp_rnd_t rnd_mode)
+{
+  if (MPFR_UNLIKELY(a != b))
+    return mpfr_set4 (a, b, rnd_mode, -MPFR_SIGN(b));
+  else if (MPFR_UNLIKELY(MPFR_IS_NAN (b)))
+    {
+      MPFR_RET_NAN;
+    }
+  else
+    {
+      MPFR_CHANGE_SIGN(a);
+      MPFR_RET(0);
+    }
+}