1*d36ac80dSriastradh /* $NetBSD: t_precision.c,v 1.4 2024/05/06 15:46:31 riastradh Exp $ */
270f0cfa1Sjoerg
370f0cfa1Sjoerg /*-
470f0cfa1Sjoerg * Copyright (c) 2013 The NetBSD Foundation, Inc.
570f0cfa1Sjoerg * All rights reserved.
670f0cfa1Sjoerg *
770f0cfa1Sjoerg * This code is derived from software contributed to The NetBSD Foundation
870f0cfa1Sjoerg * by Joerg Sonnenberger.
970f0cfa1Sjoerg *
1070f0cfa1Sjoerg * Redistribution and use in source and binary forms, with or without
1170f0cfa1Sjoerg * modification, are permitted provided that the following conditions
1270f0cfa1Sjoerg * are met:
1370f0cfa1Sjoerg * 1. Redistributions of source code must retain the above copyright
1470f0cfa1Sjoerg * notice, this list of conditions and the following disclaimer.
1570f0cfa1Sjoerg * 2. Redistributions in binary form must reproduce the above copyright
1670f0cfa1Sjoerg * notice, this list of conditions and the following disclaimer in the
1770f0cfa1Sjoerg * documentation and/or other materials provided with the distribution.
1870f0cfa1Sjoerg *
1970f0cfa1Sjoerg * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
2070f0cfa1Sjoerg * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
2170f0cfa1Sjoerg * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
2270f0cfa1Sjoerg * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
2370f0cfa1Sjoerg * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
2470f0cfa1Sjoerg * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
2570f0cfa1Sjoerg * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
2670f0cfa1Sjoerg * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
2770f0cfa1Sjoerg * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2870f0cfa1Sjoerg * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
2970f0cfa1Sjoerg * POSSIBILITY OF SUCH DAMAGE.
3070f0cfa1Sjoerg */
3170f0cfa1Sjoerg #include <sys/cdefs.h>
32*d36ac80dSriastradh __RCSID("$NetBSD: t_precision.c,v 1.4 2024/05/06 15:46:31 riastradh Exp $");
3370f0cfa1Sjoerg
3470f0cfa1Sjoerg #include <atf-c.h>
3570f0cfa1Sjoerg
3670f0cfa1Sjoerg #include <float.h>
3770f0cfa1Sjoerg #include <stdlib.h>
3870f0cfa1Sjoerg
3970f0cfa1Sjoerg ATF_TC(t_precision);
4070f0cfa1Sjoerg
ATF_TC_HEAD(t_precision,tc)4170f0cfa1Sjoerg ATF_TC_HEAD(t_precision, tc)
4270f0cfa1Sjoerg {
4370f0cfa1Sjoerg atf_tc_set_md_var(tc, "descr",
4470f0cfa1Sjoerg "Basic precision test for double and long double");
4570f0cfa1Sjoerg }
4670f0cfa1Sjoerg
4770f0cfa1Sjoerg volatile double x = 1;
4870f0cfa1Sjoerg volatile long double y = 1;
4970f0cfa1Sjoerg
ATF_TC_BODY(t_precision,tc)5070f0cfa1Sjoerg ATF_TC_BODY(t_precision, tc)
5170f0cfa1Sjoerg {
5270f0cfa1Sjoerg x += DBL_EPSILON;
5370f0cfa1Sjoerg ATF_CHECK(x != 1.0);
5470f0cfa1Sjoerg x -= 1;
5570f0cfa1Sjoerg ATF_CHECK(x == DBL_EPSILON);
5670f0cfa1Sjoerg
5770f0cfa1Sjoerg x = 2;
5870f0cfa1Sjoerg x += DBL_EPSILON;
5970f0cfa1Sjoerg ATF_CHECK(x == 2.0);
6070f0cfa1Sjoerg
6170f0cfa1Sjoerg y += LDBL_EPSILON;
6270f0cfa1Sjoerg ATF_CHECK(y != 1.0L);
6370f0cfa1Sjoerg y -= 1;
6470f0cfa1Sjoerg ATF_CHECK(y == LDBL_EPSILON);
6570f0cfa1Sjoerg y = 2;
6670f0cfa1Sjoerg y += LDBL_EPSILON;
6770f0cfa1Sjoerg ATF_CHECK(y == 2.0L);
6870f0cfa1Sjoerg }
6970f0cfa1Sjoerg
ATF_TP_ADD_TCS(tp)7070f0cfa1Sjoerg ATF_TP_ADD_TCS(tp)
7170f0cfa1Sjoerg {
7270f0cfa1Sjoerg ATF_TP_ADD_TC(tp, t_precision);
7370f0cfa1Sjoerg
7470f0cfa1Sjoerg return atf_no_error();
7570f0cfa1Sjoerg }
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