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/* Macros for floating-point negative zero.
Copyright (C) 2010-2012 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 MacOS 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 MacOS 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 MacOS 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
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