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/* Test of rint() function.
Copyright (C) 2010-2023 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 <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
#include <config.h>
#include <math.h>
#include "signature.h"
SIGNATURE_CHECK (rint, double, (double));
#include <float.h>
#include <stdio.h>
#include "isnand-nolibm.h"
#include "minus-zero.h"
#include "infinity.h"
#include "nan.h"
#include "macros.h"
#undef INFINITY
#undef NAN
#define DOUBLE double
#define ISNAN isnand
#define INFINITY Infinityd ()
#define NAN NaNd ()
#define L_(literal) literal
#define RINT rint
#define RANDOM randomd
#include "test-rint.h"
int
main ()
{
/* Consider the current rounding mode, cf.
<https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/float.h.html> */
if (FLT_ROUNDS == 1)
{
/* The current rounding mode is round-to-nearest
(the default in IEEE 754). */
/* Zero. */
ASSERT (rint (0.0) == 0.0);
ASSERT (rint (minus_zerod) == 0.0);
/* Positive numbers. */
ASSERT (rint (0.3) == 0.0);
ASSERT (rint (0.5) == 0.0); /* unlike round() */
ASSERT (rint (0.7) == 1.0);
ASSERT (rint (1.0) == 1.0);
ASSERT (rint (1.5) == 2.0);
ASSERT (rint (1.999) == 2.0);
ASSERT (rint (2.0) == 2.0);
ASSERT (rint (2.1) == 2.0);
ASSERT (rint (2.5) == 2.0); /* unlike round() */
ASSERT (rint (2.7) == 3.0);
ASSERT (rint (65535.999) == 65536.0);
ASSERT (rint (65536.0) == 65536.0);
ASSERT (rint (65536.001) == 65536.0);
ASSERT (rint (2.341e31) == 2.341e31);
/* Negative numbers. */
ASSERT (rint (-0.3) == 0.0);
ASSERT (rint (-0.5) == 0.0); /* unlike round() */
ASSERT (rint (-0.7) == -1.0);
ASSERT (rint (-1.0) == -1.0);
ASSERT (rint (-1.5) == -2.0);
ASSERT (rint (-1.999) == -2.0);
ASSERT (rint (-2.0) == -2.0);
ASSERT (rint (-2.1) == -2.0);
ASSERT (rint (-2.5) == -2.0); /* unlike round() */
ASSERT (rint (-2.7) == -3.0);
ASSERT (rint (-65535.999) == -65536.0);
ASSERT (rint (-65536.0) == -65536.0);
ASSERT (rint (-65536.001) == -65536.0);
ASSERT (rint (-2.341e31) == -2.341e31);
test_function ();
return 0;
}
else
{
fputs ("Skipping test: non-standard rounding mode\n", stderr);
return 77;
}
}
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