minix/tests/lib/libm/t_scalbn.c

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/* $NetBSD: t_scalbn.c,v 1.10 2013/05/24 11:47:13 martin 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_scalbn.c,v 1.10 2013/05/24 11:47:13 martin Exp $");
#include <math.h>
#include <limits.h>
#include <float.h>
#include <errno.h>
#include <atf-c.h>
static const int exps[] = { 0, 1, -1, 100, -100 };
/* tests here do not require specific precision, so we just use double */
struct testcase {
int exp;
double inval;
double result;
int error;
};
struct testcase test_vals[] = {
{ 0, 1.00085, 1.00085, 0 },
{ 0, 0.99755, 0.99755, 0 },
{ 0, -1.00085, -1.00085, 0 },
{ 0, -0.99755, -0.99755, 0 },
{ 1, 1.00085, 2.0* 1.00085, 0 },
{ 1, 0.99755, 2.0* 0.99755, 0 },
{ 1, -1.00085, 2.0* -1.00085, 0 },
{ 1, -0.99755, 2.0* -0.99755, 0 },
/*
* We could add more corner test cases here, but we would have to
* add some ifdefs for the exact format and use a reliable
* generator program - bail for now and only do trivial stuff above.
*/
};
/*
* scalbn(3)
*/
ATF_TC(scalbn_val);
ATF_TC_HEAD(scalbn_val, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbn() for a few values");
}
ATF_TC_BODY(scalbn_val, tc)
{
const struct testcase *tests = test_vals;
const size_t tcnt = __arraycount(test_vals);
size_t i;
double rv;
for (i = 0; i < tcnt; i++) {
rv = scalbn(tests[i].inval, tests[i].exp);
ATF_CHECK_EQ_MSG(errno, tests[i].error,
"test %zu: errno %d instead of %d", i, errno,
tests[i].error);
ATF_CHECK_MSG(fabs(rv-tests[i].result)<2.0*DBL_EPSILON,
"test %zu: return value %g instead of %g (difference %g)",
i, rv, tests[i].result, tests[i].result-rv);
}
}
ATF_TC(scalbn_nan);
ATF_TC_HEAD(scalbn_nan, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbn(NaN, n) == NaN");
}
ATF_TC_BODY(scalbn_nan, tc)
{
#ifndef __vax__
const double x = 0.0L / 0.0L;
double y;
size_t i;
ATF_REQUIRE(isnan(x) != 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbn(x, exps[i]);
ATF_CHECK(isnan(y) != 0);
}
#endif
}
ATF_TC(scalbn_inf_neg);
ATF_TC_HEAD(scalbn_inf_neg, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbn(-Inf, n) == -Inf");
}
ATF_TC_BODY(scalbn_inf_neg, tc)
{
#ifndef __vax__
const double x = -1.0L / 0.0L;
size_t i;
for (i = 0; i < __arraycount(exps); i++)
ATF_CHECK(scalbn(x, exps[i]) == x);
#endif
}
ATF_TC(scalbn_inf_pos);
ATF_TC_HEAD(scalbn_inf_pos, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbn(+Inf, n) == +Inf");
}
ATF_TC_BODY(scalbn_inf_pos, tc)
{
#ifndef __vax__
const double x = 1.0L / 0.0L;
size_t i;
for (i = 0; i < __arraycount(exps); i++)
ATF_CHECK(scalbn(x, exps[i]) == x);
#endif
}
ATF_TC(scalbn_ldexp);
ATF_TC_HEAD(scalbn_ldexp, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbn(x, n) == ldexp(x, n)");
}
ATF_TC_BODY(scalbn_ldexp, tc)
{
#ifndef __vax__
#if FLT_RADIX == 2
const double x = 2.91288191221812821;
double y;
size_t i;
for (i = 0; i < __arraycount(exps); i++) {
y = scalbn(x, exps[i]);
ATF_CHECK_MSG(y == ldexp(x, exps[i]), "test %zu: exponent=%d, "
"y=%g, expected %g (diff: %g)", i, exps[i], y,
ldexp(x, exps[i]), y - ldexp(x, exps[i]));
}
#endif
#endif
}
ATF_TC(scalbn_zero_neg);
ATF_TC_HEAD(scalbn_zero_neg, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbn(-0.0, n) == -0.0");
}
ATF_TC_BODY(scalbn_zero_neg, tc)
{
#ifndef __vax__
const double x = -0.0L;
double y;
size_t i;
ATF_REQUIRE(signbit(x) != 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbn(x, exps[i]);
ATF_CHECK(x == y);
ATF_CHECK(signbit(y) != 0);
}
#endif
}
ATF_TC(scalbn_zero_pos);
ATF_TC_HEAD(scalbn_zero_pos, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbn(+0.0, n) == +0.0");
}
ATF_TC_BODY(scalbn_zero_pos, tc)
{
#ifndef __vax__
const double x = 0.0L;
double y;
size_t i;
ATF_REQUIRE(signbit(x) == 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbn(x, exps[i]);
ATF_CHECK(x == y);
ATF_CHECK(signbit(y) == 0);
}
#endif
}
/*
* scalbnf(3)
*/
ATF_TC(scalbnf_val);
ATF_TC_HEAD(scalbnf_val, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnf() for a few values");
}
ATF_TC_BODY(scalbnf_val, tc)
{
#ifndef __vax__
const struct testcase *tests = test_vals;
const size_t tcnt = __arraycount(test_vals);
size_t i;
double rv;
for (i = 0; i < tcnt; i++) {
rv = scalbnf(tests[i].inval, tests[i].exp);
ATF_CHECK_EQ_MSG(errno, tests[i].error,
"test %zu: errno %d instead of %d", i, errno,
tests[i].error);
ATF_CHECK_MSG(fabs(rv-tests[i].result)<2.0*FLT_EPSILON,
"test %zu: return value %g instead of %g (difference %g)",
i, rv, tests[i].result, tests[i].result-rv);
}
#endif
}
ATF_TC(scalbnf_nan);
ATF_TC_HEAD(scalbnf_nan, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnf(NaN, n) == NaN");
}
ATF_TC_BODY(scalbnf_nan, tc)
{
#ifndef __vax__
const float x = 0.0L / 0.0L;
float y;
size_t i;
ATF_REQUIRE(isnan(x) != 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbnf(x, exps[i]);
ATF_CHECK(isnan(y) != 0);
}
#endif
}
ATF_TC(scalbnf_inf_neg);
ATF_TC_HEAD(scalbnf_inf_neg, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnf(-Inf, n) == -Inf");
}
ATF_TC_BODY(scalbnf_inf_neg, tc)
{
#ifndef __vax__
const float x = -1.0L / 0.0L;
size_t i;
for (i = 0; i < __arraycount(exps); i++)
ATF_CHECK(scalbnf(x, exps[i]) == x);
#endif
}
ATF_TC(scalbnf_inf_pos);
ATF_TC_HEAD(scalbnf_inf_pos, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnf(+Inf, n) == +Inf");
}
ATF_TC_BODY(scalbnf_inf_pos, tc)
{
#ifndef __vax__
const float x = 1.0L / 0.0L;
size_t i;
for (i = 0; i < __arraycount(exps); i++)
ATF_CHECK(scalbnf(x, exps[i]) == x);
#endif
}
ATF_TC(scalbnf_ldexpf);
ATF_TC_HEAD(scalbnf_ldexpf, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnf(x, n) == ldexpf(x, n)");
}
ATF_TC_BODY(scalbnf_ldexpf, tc)
{
#ifndef __vax__
#if FLT_RADIX == 2
const float x = 2.91288191221812821;
float y;
size_t i;
for (i = 0; i < __arraycount(exps); i++) {
y = scalbnf(x, exps[i]);
ATF_CHECK_MSG(y == ldexpf(x, exps[i]),
"test %zu: exponent=%d, y=%g ldexpf returns %g (diff: %g)",
i, exps[i], y, ldexpf(x, exps[i]), y-ldexpf(x, exps[i]));
}
#endif
#endif
}
ATF_TC(scalbnf_zero_neg);
ATF_TC_HEAD(scalbnf_zero_neg, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnf(-0.0, n) == -0.0");
}
ATF_TC_BODY(scalbnf_zero_neg, tc)
{
#ifndef __vax__
const float x = -0.0L;
float y;
size_t i;
ATF_REQUIRE(signbit(x) != 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbnf(x, exps[i]);
ATF_CHECK(x == y);
ATF_CHECK(signbit(y) != 0);
}
#endif
}
ATF_TC(scalbnf_zero_pos);
ATF_TC_HEAD(scalbnf_zero_pos, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnf(+0.0, n) == +0.0");
}
ATF_TC_BODY(scalbnf_zero_pos, tc)
{
#ifndef __vax__
const float x = 0.0L;
float y;
size_t i;
ATF_REQUIRE(signbit(x) == 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbnf(x, exps[i]);
ATF_CHECK(x == y);
ATF_CHECK(signbit(y) == 0);
}
#endif
}
/*
* scalbnl(3)
*/
ATF_TC(scalbnl_val);
ATF_TC_HEAD(scalbnl_val, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnl() for a few values");
}
ATF_TC_BODY(scalbnl_val, tc)
{
#ifndef __HAVE_LONG_DOUBLE
atf_tc_skip("Requires long double support");
#else
const struct testcase *tests = test_vals;
const size_t tcnt = __arraycount(test_vals);
size_t i;
long double rv;
for (i = 0; i < tcnt; i++) {
rv = scalbnl(tests[i].inval, tests[i].exp);
ATF_CHECK_EQ_MSG(errno, tests[i].error,
"test %zu: errno %d instead of %d", i, errno,
tests[i].error);
ATF_CHECK_MSG(fabsl(rv-(long double)tests[i].result)<2.0*LDBL_EPSILON,
"test %zu: return value %Lg instead of %Lg (difference %Lg)",
i, rv, (long double)tests[i].result, (long double)tests[i].result-rv);
}
#endif
}
ATF_TC(scalbnl_nan);
ATF_TC_HEAD(scalbnl_nan, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnl(NaN, n) == NaN");
}
ATF_TC_BODY(scalbnl_nan, tc)
{
#ifndef __vax__
#ifndef __HAVE_LONG_DOUBLE
atf_tc_skip("Requires long double support");
#else
const long double x = 0.0L / 0.0L;
long double y;
size_t i;
if (isnan(x) == 0) {
atf_tc_expect_fail("PR lib/45362");
atf_tc_fail("(0.0L / 0.0L) != NaN");
}
for (i = 0; i < __arraycount(exps); i++) {
y = scalbnl(x, exps[i]);
ATF_CHECK(isnan(y) != 0);
}
#endif
#endif
}
ATF_TC(scalbnl_inf_neg);
ATF_TC_HEAD(scalbnl_inf_neg, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnl(-Inf, n) == -Inf");
}
ATF_TC_BODY(scalbnl_inf_neg, tc)
{
#ifndef __vax__
#ifndef __HAVE_LONG_DOUBLE
atf_tc_skip("Requires long double support");
#else
const long double x = -1.0L / 0.0L;
size_t i;
for (i = 0; i < __arraycount(exps); i++)
ATF_CHECK(scalbnl(x, exps[i]) == x);
#endif
#endif
}
ATF_TC(scalbnl_inf_pos);
ATF_TC_HEAD(scalbnl_inf_pos, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnl(+Inf, n) == +Inf");
}
ATF_TC_BODY(scalbnl_inf_pos, tc)
{
#ifndef __vax__
#ifndef __HAVE_LONG_DOUBLE
atf_tc_skip("Requires long double support");
#else
const long double x = 1.0L / 0.0L;
size_t i;
for (i = 0; i < __arraycount(exps); i++)
ATF_CHECK(scalbnl(x, exps[i]) == x);
#endif
#endif
}
ATF_TC(scalbnl_zero_neg);
ATF_TC_HEAD(scalbnl_zero_neg, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnl(-0.0, n) == -0.0");
}
ATF_TC_BODY(scalbnl_zero_neg, tc)
{
#ifndef __vax__
#ifndef __HAVE_LONG_DOUBLE
atf_tc_skip("Requires long double support");
#else
const long double x = -0.0L;
long double y;
size_t i;
ATF_REQUIRE(signbit(x) != 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbnl(x, exps[i]);
ATF_CHECK(x == y);
ATF_CHECK(signbit(y) != 0);
}
#endif
#endif
}
ATF_TC(scalbnl_zero_pos);
ATF_TC_HEAD(scalbnl_zero_pos, tc)
{
atf_tc_set_md_var(tc, "descr", "Test scalbnl(+0.0, n) == +0.0");
}
ATF_TC_BODY(scalbnl_zero_pos, tc)
{
#ifndef __vax__
#ifndef __HAVE_LONG_DOUBLE
atf_tc_skip("Requires long double support");
#else
const long double x = 0.0L;
long double y;
size_t i;
ATF_REQUIRE(signbit(x) == 0);
for (i = 0; i < __arraycount(exps); i++) {
y = scalbnl(x, exps[i]);
ATF_CHECK(x == y);
ATF_CHECK(signbit(y) == 0);
}
#endif
#endif
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, scalbn_val);
ATF_TP_ADD_TC(tp, scalbn_nan);
ATF_TP_ADD_TC(tp, scalbn_inf_neg);
ATF_TP_ADD_TC(tp, scalbn_inf_pos);
ATF_TP_ADD_TC(tp, scalbn_ldexp);
ATF_TP_ADD_TC(tp, scalbn_zero_neg);
ATF_TP_ADD_TC(tp, scalbn_zero_pos);
ATF_TP_ADD_TC(tp, scalbnf_val);
ATF_TP_ADD_TC(tp, scalbnf_nan);
ATF_TP_ADD_TC(tp, scalbnf_inf_neg);
ATF_TP_ADD_TC(tp, scalbnf_inf_pos);
ATF_TP_ADD_TC(tp, scalbnf_ldexpf);
ATF_TP_ADD_TC(tp, scalbnf_zero_neg);
ATF_TP_ADD_TC(tp, scalbnf_zero_pos);
ATF_TP_ADD_TC(tp, scalbnl_val);
ATF_TP_ADD_TC(tp, scalbnl_nan);
ATF_TP_ADD_TC(tp, scalbnl_inf_neg);
ATF_TP_ADD_TC(tp, scalbnl_inf_pos);
/* ATF_TP_ADD_TC(tp, scalbnl_ldexp); */
ATF_TP_ADD_TC(tp, scalbnl_zero_neg);
ATF_TP_ADD_TC(tp, scalbnl_zero_pos);
return atf_no_error();
}