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/* Test for the C++ implementation of issignaling.
Copyright (C) 2017-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C 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 C 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 C Library; if not, see
<https://www.gnu.org/licenses/>. */
#define _GNU_SOURCE 1
#include <math.h>
#include <stdio.h>
#include <limits>
/* There is no signaling_NaN for _Float128 in std::numeric_limits.
Include ieee754_float128.h and use the bitfields in the union
ieee854_float128.ieee_nan to build a signaling NaN. */
#if __HAVE_DISTINCT_FLOAT128
# include <ieee754_float128.h>
#endif
static bool errors;
static void
check (int actual, int expected, const char *actual_expr, int line)
{
if (actual != expected)
{
errors = true;
printf ("%s:%d: error: %s\n", __FILE__, line, actual_expr);
printf ("%s:%d: expected: %d\n", __FILE__, line, expected);
printf ("%s:%d: actual: %d\n", __FILE__, line, actual);
}
}
#define CHECK(actual, expected) \
check ((actual), (expected), #actual, __LINE__)
template <class T>
static void
check_type ()
{
typedef std::numeric_limits<T> limits;
CHECK (issignaling (T{0}), 0);
if (limits::has_infinity)
{
CHECK (issignaling (limits::infinity ()), 0);
CHECK (issignaling (-limits::infinity ()), 0);
}
if (limits::has_quiet_NaN)
CHECK (issignaling (limits::quiet_NaN ()), 0);
if (limits::has_signaling_NaN)
CHECK (issignaling (limits::signaling_NaN ()), 1);
}
#if __HAVE_DISTINCT_FLOAT128
static void
check_float128 ()
{
ieee854_float128 q;
q.d = 0;
CHECK (issignaling (q.d), 0);
/* Infinity. */
q.ieee.negative = 0;
q.ieee.exponent = 0x7FFF;
q.ieee.mantissa0 = 0x0000;
q.ieee.mantissa1 = 0x00000000;
q.ieee.mantissa2 = 0x00000000;
q.ieee.mantissa3 = 0x00000000;
CHECK (issignaling (q.d), 0);
/* Quiet NaN. */
q.ieee_nan.quiet_nan = 1;
q.ieee_nan.mantissa0 = 0x0000;
CHECK (issignaling (q.d), 0);
/* Still a quiet NaN. */
q.ieee_nan.quiet_nan = 1;
q.ieee_nan.mantissa0 = 0x4000;
CHECK (issignaling (q.d), 0);
/* Signaling NaN. */
q.ieee_nan.quiet_nan = 0;
q.ieee_nan.mantissa0 = 0x4000;
CHECK (issignaling (q.d), 1);
}
#endif
static int
do_test (void)
{
check_type<float> ();
check_type<double> ();
check_type<long double> ();
#if __HAVE_DISTINCT_FLOAT128
check_float128 ();
#endif
return errors;
}
#include <support/test-driver.c>
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