diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libm/t_scalbn.c')
| -rw-r--r-- | contrib/netbsd-tests/lib/libm/t_scalbn.c | 546 |
1 files changed, 546 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libm/t_scalbn.c b/contrib/netbsd-tests/lib/libm/t_scalbn.c new file mode 100644 index 000000000000..dce07aac3c78 --- /dev/null +++ b/contrib/netbsd-tests/lib/libm/t_scalbn.c @@ -0,0 +1,546 @@ +/* $NetBSD: t_scalbn.c,v 1.16 2018/11/07 03:59:36 riastradh 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 1.16 2018/11/07 03:59:36 riastradh Exp $"); + +#include <math.h> +#include <limits.h> +#include <float.h> +#include <errno.h> +#include <fenv.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; + int except; +}; +static struct testcase test_vals[] = { + { 0, 1.00085, 1.00085, 0, 0 }, + { 0, 0.99755, 0.99755, 0, 0 }, + { 0, -1.00085, -1.00085, 0, 0 }, + { 0, -0.99755, -0.99755, 0, 0 }, + { 1, 1.00085, 2.0* 1.00085, 0, 0 }, + { 1, 0.99755, 2.0* 0.99755, 0, 0 }, + { 1, -1.00085, 2.0* -1.00085, 0, 0 }, + { 1, -0.99755, 2.0* -0.99755, 0, 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++) { + errno = 0; +#ifndef __vax__ + feclearexcept(FE_ALL_EXCEPT); +#endif + 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); +#ifndef __vax__ + ATF_CHECK_EQ_MSG(errno, tests[i].error, + "test %zu: fetestexcept %d instead of %d", i, + fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW), + tests[i].except); +#endif + /* scalbn is always exact except for underflow or overflow. */ + ATF_CHECK_MSG(rv == tests[i].result, + "test %zu: return value %.17g instead of %.17g" + " (error %.17g)", + i, rv, tests[i].result, + fabs((tests[i].result - rv)/tests[i].result)); + } +} + +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) +{ + 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); + } +} + +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) +{ + const double x = -1.0L / 0.0L; + size_t i; + + for (i = 0; i < __arraycount(exps); i++) + ATF_CHECK(scalbn(x, exps[i]) == x); +} + +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) +{ + const double x = 1.0L / 0.0L; + size_t i; + + for (i = 0; i < __arraycount(exps); i++) + ATF_CHECK(scalbn(x, exps[i]) == x); +} + +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) +{ +#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 +} + +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) +{ + 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); + } +} + +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) +{ + 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); + } +} + +/* + * 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) +{ + const struct testcase *tests = test_vals; + const size_t tcnt = __arraycount(test_vals); + size_t i; + double rv; + + for (i = 0; i < tcnt; i++) { + errno = 0; + 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); + /* scalbn is always exact except for underflow or overflow. */ + ATF_CHECK_MSG(rv == (float)tests[i].result, + "test %zu: return value %.8g instead of %.8g" + " (error %.8g)", + i, rv, tests[i].result, + fabs((tests[i].result - rv)/tests[i].result)); + } +} + +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) +{ + 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); + } +} + +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) +{ + const float x = -1.0L / 0.0L; + size_t i; + + for (i = 0; i < __arraycount(exps); i++) + ATF_CHECK(scalbnf(x, exps[i]) == x); +} + +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) +{ + const float x = 1.0L / 0.0L; + size_t i; + + for (i = 0; i < __arraycount(exps); i++) + ATF_CHECK(scalbnf(x, exps[i]) == x); +} + +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) +{ +#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 +} + +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) +{ + 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); + } +} + +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) +{ + 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); + } +} + +/* + * 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++) { + errno = 0; + 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); + /* scalbn is always exact except for underflow or overflow. */ + ATF_CHECK_MSG(rv == (long double)tests[i].result, + "test %zu: return value %.35Lg instead of %.35Lg" + " (error %.35Lg)", + i, rv, (long double)tests[i].result, + fabsl(((long double)tests[i].result - rv)/tests[i].result)); + } +#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 __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 +} + +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 __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 +} + +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 __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 +} + +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 __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 +} + +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 __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 +} + +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(); +} |