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+/* Macros for floating-point negative zero.
+ Copyright (C) 2010-2015 Free Software Foundation, Inc.
+
+ This program 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.
+
+ This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Keep in sync with m4/minus-zero.m4! */
+
+#include <float.h>
+
+
+/* minus_zerof represents the value -0.0f. */
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
+ ICC 10.0 has a bug when optimizing the expression -zero.
+ The expression -FLT_MIN * FLT_MIN does not work when cross-compiling
+ to PowerPC on Mac OS X 10.5. */
+#if defined __hpux || defined __sgi || defined __ICC
+static float
+compute_minus_zerof (void)
+{
+ return -FLT_MIN * FLT_MIN;
+}
+# define minus_zerof compute_minus_zerof ()
+#else
+float minus_zerof = -0.0f;
+#endif
+
+
+/* minus_zerod represents the value -0.0. */
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+ ICC 10.0 has a bug when optimizing the expression -zero.
+ The expression -DBL_MIN * DBL_MIN does not work when cross-compiling
+ to PowerPC on Mac OS X 10.5. */
+#if defined __hpux || defined __sgi || defined __ICC
+static double
+compute_minus_zerod (void)
+{
+ return -DBL_MIN * DBL_MIN;
+}
+# define minus_zerod compute_minus_zerod ()
+#else
+double minus_zerod = -0.0;
+#endif
+
+
+/* minus_zerol represents the value -0.0L. */
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L.
+ IRIX cc can't put -0.0L into .data, but can compute at runtime.
+ ICC 10.0 has a bug when optimizing the expression -zero.
+ The expression -LDBL_MIN * LDBL_MIN does not work when cross-compiling
+ to PowerPC on Mac OS X 10.5. */
+#if defined __hpux || defined __sgi || defined __ICC
+static long double
+compute_minus_zerol (void)
+{
+ return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zerol compute_minus_zerol ()
+#else
+long double minus_zerol = -0.0L;
+#endif