mirror of
https://git.savannah.gnu.org/git/gnulib.git
synced 2025-08-16 01:22:18 +03:00
a3fd683de3
* build-aux/gendocs.sh (version): * doc/gendocs_template: * doc/gendocs_template_min: * doc/gnulib.texi: * lib/version-etc.c (COPYRIGHT_YEAR): Update copyright dates by hand in templates and the like. * all files: Run 'make update-copyright'.
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/* Test of copysignf() function.
|
|
Copyright (C) 2010-2017 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/>. */
|
|
|
|
/* Written by Bruno Haible <bruno@clisp.org>, 2010-2011. */
|
|
|
|
#include <config.h>
|
|
|
|
#include <math.h>
|
|
|
|
#include "signature.h"
|
|
SIGNATURE_CHECK (copysignf, float, (float, float));
|
|
|
|
#include "macros.h"
|
|
#include "minus-zero.h"
|
|
|
|
#include <string.h>
|
|
|
|
volatile float x;
|
|
volatile float y;
|
|
float z;
|
|
float zero = 0.0f;
|
|
|
|
int
|
|
main ()
|
|
{
|
|
/* A particular value in the first quadrant. */
|
|
x = 0.6f;
|
|
y = 0.8f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 0.6f);
|
|
|
|
/* A particular value in the second quadrant. */
|
|
x = -0.6f;
|
|
y = 0.8f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 0.6f);
|
|
|
|
/* A particular value in the third quadrant. */
|
|
x = -0.6f;
|
|
y = -0.8f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == -0.6f);
|
|
|
|
/* A particular value in the fourth quadrant. */
|
|
x = 0.6f;
|
|
y = -0.8f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == -0.6f);
|
|
|
|
/* From signed zero. */
|
|
x = 1.0f;
|
|
y = 0.0f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 1.0f);
|
|
|
|
x = 1.0f;
|
|
y = minus_zerof;
|
|
z = copysignf (x, y);
|
|
/* Assume all gnulib targets support -0.0f, until proven otherwise. */
|
|
ASSERT (z == -1.0f);
|
|
|
|
x = -1.0f;
|
|
y = 0.0f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 1.0f);
|
|
|
|
x = -1.0f;
|
|
y = minus_zerof;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == -1.0f);
|
|
|
|
/* To signed zero. */
|
|
x = 0.0f;
|
|
y = 1.0f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 0.0f);
|
|
ASSERT (memcmp (&z, &zero, sizeof z) == 0);
|
|
|
|
x = 0.0f;
|
|
y = -1.0f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 0.0f);
|
|
ASSERT (memcmp (&z, &zero, sizeof z) != 0);
|
|
|
|
x = minus_zerof;
|
|
y = 1.0f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 0.0f);
|
|
ASSERT (memcmp (&z, &zero, sizeof z) == 0);
|
|
|
|
x = minus_zerof;
|
|
y = -1.0f;
|
|
z = copysignf (x, y);
|
|
ASSERT (z == 0.0f);
|
|
ASSERT (memcmp (&z, &zero, sizeof z) != 0);
|
|
|
|
return 0;
|
|
}
|