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/* Macros for signalling not-a-number.
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#ifndef _SIGNED_SNAN_H
#define _SIGNED_SNAN_H
#include "signed-nan.h"
#include "snan.h"
#ifdef __cplusplus
extern "C" {
#endif
#if HAVE_SNANF
/* Returns a signalling 'float' NaN with sign bit == 0 in memory. */
_GL_UNUSED static memory_float
memory_positive_SNaNf ()
{
return construct_memory_SNaNf (positive_NaNf ());
}
/* Returns a signalling 'float' NaN with sign bit == 1 in memory. */
_GL_UNUSED static memory_float
memory_negative_SNaNf ()
{
return construct_memory_SNaNf (negative_NaNf ());
}
/* Note: On 32-bit x86 processors, as well as on x86_64 processors with
CC="gcc -mfpmath=387", the following functions may return a quiet NaN
instead. Use the functions with 'memory_' prefix if you need to avoid this.
See <https://lists.gnu.org/archive/html/bug-gnulib/2023-10/msg00060.html>
for details. */
/* Returns a signalling 'float' NaN with sign bit == 0. */
_GL_UNUSED static float
positive_SNaNf ()
{
return memory_positive_SNaNf ().value;
}
/* Returns a signalling 'float' NaN with sign bit == 1. */
_GL_UNUSED static float
negative_SNaNf ()
{
return memory_negative_SNaNf ().value;
}
#endif
#if HAVE_SNAND
/* Returns a signalling 'double' NaN with sign bit == 0 in memory. */
_GL_UNUSED static memory_double
memory_positive_SNaNd ()
{
return construct_memory_SNaNd (positive_NaNd ());
}
/* Returns a signalling 'double' NaN with sign bit == 1 in memory. */
_GL_UNUSED static memory_double
memory_negative_SNaNd ()
{
return construct_memory_SNaNd (negative_NaNd ());
}
/* Note: On 32-bit x86 processors, as well as on x86_64 processors with
CC="gcc -mfpmath=387", the following functions may return a quiet NaN
instead. Use the functions with 'memory_' prefix if you need to avoid this.
See <https://lists.gnu.org/archive/html/bug-gnulib/2023-10/msg00060.html>
for details. */
/* Returns a signalling 'double' NaN with sign bit == 0. */
_GL_UNUSED static double
positive_SNaNd ()
{
return memory_positive_SNaNd ().value;
}
/* Returns a signalling 'double' NaN with sign bit == 1. */
_GL_UNUSED static double
negative_SNaNd ()
{
return memory_negative_SNaNd ().value;
}
#endif
#if HAVE_SNANL
/* Returns a signalling 'long double' NaN with sign bit == 0 in memory. */
_GL_UNUSED static memory_long_double
memory_positive_SNaNl ()
{
return construct_memory_SNaNl (positive_NaNl ());
}
/* Returns a signalling 'long double' NaN with sign bit == 1 in memory. */
_GL_UNUSED static memory_long_double
memory_negative_SNaNl ()
{
return construct_memory_SNaNl (negative_NaNl ());
}
/* Note: On 32-bit x86 processors, as well as on x86_64 processors with
CC="gcc -mfpmath=387", if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE is 1, the
following functions may return a quiet NaN instead. Use the functions
with 'memory_' prefix if you need to avoid this. See
<https://lists.gnu.org/archive/html/bug-gnulib/2023-10/msg00060.html>
for details. */
/* Returns a signalling 'long double' NaN with sign bit == 0. */
_GL_UNUSED static long double
positive_SNaNl ()
{
return memory_positive_SNaNl ().value;
}
/* Returns a signalling 'long double' NaN with sign bit == 1. */
_GL_UNUSED static long double
negative_SNaNl ()
{
return memory_negative_SNaNl ().value;
}
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SIGNED_SNAN_H */
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