NetBSD/tests/lib/libm/t_cosh.c

/* $NetBSD: t_cosh.c,v 1.4 2011/10/18 14:16:42 jruoho Exp $ */

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jukka Ruohonen.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include <sys/cdefs.h>
__RCSID("$NetBSD: t_cosh.c,v 1.4 2011/10/18 14:16:42 jruoho Exp $");

#include <atf-c.h>
#include <math.h>
#include <stdio.h>

/*
 * cosh(3)
 */
ATF_TC(cosh_def);
ATF_TC_HEAD(cosh_def, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test the definition of cosh(3)");
}

ATF_TC_BODY(cosh_def, tc)
{
#ifndef __vax__
	const double x[] = { 0.005, 0.05, 0.0, 1.0, 10.0, 20.0 };
	const double eps = 1.0e-8;
	double y, z;
	size_t i;

	for (i = 0; i < __arraycount(x); i++) {

		y = cosh(x[i]);
		z = (exp(x[i]) + exp(-x[i])) / 2;

		(void)fprintf(stderr,
		    "cosh(%0.03f) = %f\n(exp(%0.03f) + "
		    "exp(-%0.03f)) / 2 = %f\n", x[i], y, x[i], x[i], z);

		if (fabs(y - z) > eps)
			atf_tc_fail_nonfatal("cosh(%0.03f) != %0.03f\n",
			    x[i], z);
	}
#endif
}

ATF_TC(cosh_nan);
ATF_TC_HEAD(cosh_nan, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test cosh(NaN) == NaN");
}

ATF_TC_BODY(cosh_nan, tc)
{
#ifndef __vax__
	const double x = 0.0L / 0.0L;

	ATF_CHECK(isnan(x) != 0);
	ATF_CHECK(isnan(cosh(x)) != 0);
#endif
}

ATF_TC(cosh_inf_neg);
ATF_TC_HEAD(cosh_inf_neg, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test cosh(-Inf) == +Inf");
}

ATF_TC_BODY(cosh_inf_neg, tc)
{
#ifndef __vax__
	const double x = -1.0L / 0.0L;
	double y = cosh(x);

	ATF_CHECK(isinf(y) != 0);
	ATF_CHECK(signbit(y) == 0);
#endif
}

ATF_TC(cosh_inf_pos);
ATF_TC_HEAD(cosh_inf_pos, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test cosh(+Inf) == +Inf");
}

ATF_TC_BODY(cosh_inf_pos, tc)
{
#ifndef __vax__
	const double x = 1.0L / 0.0L;
	double y = cosh(x);

	ATF_CHECK(isinf(y) != 0);
	ATF_CHECK(signbit(y) == 0);
#endif
}

ATF_TC(cosh_zero_neg);
ATF_TC_HEAD(cosh_zero_neg, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test cosh(-0.0) == 1.0");
}

ATF_TC_BODY(cosh_zero_neg, tc)
{
#ifndef __vax__
	const double x = -0.0L;

	if (cosh(x) != 1.0)
		atf_tc_fail_nonfatal("cosh(-0.0) != 1.0");
#endif
}

ATF_TC(cosh_zero_pos);
ATF_TC_HEAD(cosh_zero_pos, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test cosh(+0.0) == 1.0");
}

ATF_TC_BODY(cosh_zero_pos, tc)
{
#ifndef __vax__
	const double x = 0.0L;

	if (cosh(x) != 1.0)
		atf_tc_fail_nonfatal("cosh(+0.0) != 1.0");
#endif
}

/*
 * coshf(3)
 */
ATF_TC(coshf_def);
ATF_TC_HEAD(coshf_def, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test the definition of coshf(3)");
}

ATF_TC_BODY(coshf_def, tc)
{
#ifndef __vax__
	const double x[] = { 0.005, 0.05, 0.0, 1.0, 10.0, 20.0 };
	const float eps = 1.0e-3;
	float y, z;
	size_t i;

	for (i = 0; i < __arraycount(x); i++) {

		y = coshf(x[i]);
		z = (expf(x[i]) + expf(-x[i])) / 2;

		(void)fprintf(stderr,
		    "coshf(%0.03f) = %f\n(expf(%0.03f) + "
		    "expf(-%0.03f)) / 2 = %f\n", x[i], y, x[i], x[i], z);

		if (fabsf(y - z) > eps)
			atf_tc_fail_nonfatal("coshf(%0.03f) != %0.03f\n",
			    x[i], z);
	}
#endif
}

ATF_TC(coshf_nan);
ATF_TC_HEAD(coshf_nan, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test coshf(NaN) == NaN");
}

ATF_TC_BODY(coshf_nan, tc)
{
#ifndef __vax__
	const float x = 0.0L / 0.0L;

	ATF_CHECK(isnan(x) != 0);
	ATF_CHECK(isnan(coshf(x)) != 0);
#endif
}

ATF_TC(coshf_inf_neg);
ATF_TC_HEAD(coshf_inf_neg, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test coshf(-Inf) == +Inf");
}

ATF_TC_BODY(coshf_inf_neg, tc)
{
#ifndef __vax__
	const float x = -1.0L / 0.0L;
	float y = coshf(x);

	ATF_CHECK(isinf(y) != 0);
	ATF_CHECK(signbit(y) == 0);
#endif
}

ATF_TC(coshf_inf_pos);
ATF_TC_HEAD(coshf_inf_pos, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test coshf(+Inf) == +Inf");
}

ATF_TC_BODY(coshf_inf_pos, tc)
{
#ifndef __vax__
	const float x = 1.0L / 0.0L;
	float y = coshf(x);

	ATF_CHECK(isinf(y) != 0);
	ATF_CHECK(signbit(y) == 0);
#endif
}

ATF_TC(coshf_zero_neg);
ATF_TC_HEAD(coshf_zero_neg, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test coshf(-0.0) == 1.0");
}

ATF_TC_BODY(coshf_zero_neg, tc)
{
#ifndef __vax__
	const float x = -0.0L;

	if (coshf(x) != 1.0)
		atf_tc_fail_nonfatal("coshf(-0.0) != 1.0");
#endif
}

ATF_TC(coshf_zero_pos);
ATF_TC_HEAD(coshf_zero_pos, tc)
{
	atf_tc_set_md_var(tc, "descr", "Test coshf(+0.0) == 1.0");
}

ATF_TC_BODY(coshf_zero_pos, tc)
{
#ifndef __vax__
	const float x = 0.0L;

	if (coshf(x) != 1.0)
		atf_tc_fail_nonfatal("coshf(+0.0) != 1.0");
#endif
}

ATF_TP_ADD_TCS(tp)
{

	ATF_TP_ADD_TC(tp, cosh_def);
	ATF_TP_ADD_TC(tp, cosh_nan);
	ATF_TP_ADD_TC(tp, cosh_inf_neg);
	ATF_TP_ADD_TC(tp, cosh_inf_pos);
	ATF_TP_ADD_TC(tp, cosh_zero_neg);
	ATF_TP_ADD_TC(tp, cosh_zero_pos);

	ATF_TP_ADD_TC(tp, coshf_def);
	ATF_TP_ADD_TC(tp, coshf_nan);
	ATF_TP_ADD_TC(tp, coshf_inf_neg);
	ATF_TP_ADD_TC(tp, coshf_inf_pos);
	ATF_TP_ADD_TC(tp, coshf_zero_neg);
	ATF_TP_ADD_TC(tp, coshf_zero_pos);

	return atf_no_error();
}