1274079Sngie/* $NetBSD: t_precision.c,v 1.2 2014/11/04 00:20:19 justin Exp $ */
2272343Sngie
3272343Sngie/*-
4272343Sngie * Copyright (c) 2013 The NetBSD Foundation, Inc.
5272343Sngie * All rights reserved.
6272343Sngie *
7272343Sngie * This code is derived from software contributed to The NetBSD Foundation
8272343Sngie * by Joerg Sonnenberger.
9272343Sngie *
10272343Sngie * Redistribution and use in source and binary forms, with or without
11272343Sngie * modification, are permitted provided that the following conditions
12272343Sngie * are met:
13272343Sngie * 1. Redistributions of source code must retain the above copyright
14272343Sngie *    notice, this list of conditions and the following disclaimer.
15272343Sngie * 2. Redistributions in binary form must reproduce the above copyright
16272343Sngie *    notice, this list of conditions and the following disclaimer in the
17272343Sngie *    documentation and/or other materials provided with the distribution.
18272343Sngie *
19272343Sngie * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20272343Sngie * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21272343Sngie * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22272343Sngie * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23272343Sngie * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24272343Sngie * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25272343Sngie * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26272343Sngie * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27272343Sngie * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28272343Sngie * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29272343Sngie * POSSIBILITY OF SUCH DAMAGE.
30272343Sngie */
31272343Sngie#include <sys/cdefs.h>
32274079Sngie__RCSID("$NetBSD: t_precision.c,v 1.2 2014/11/04 00:20:19 justin Exp $");
33272343Sngie
34272343Sngie#include <atf-c.h>
35272343Sngie
36272343Sngie#include <float.h>
37272343Sngie#include <stdlib.h>
38272343Sngie
39272343SngieATF_TC(t_precision);
40272343Sngie
41272343SngieATF_TC_HEAD(t_precision, tc)
42272343Sngie{
43272343Sngie	atf_tc_set_md_var(tc, "descr",
44272343Sngie	    "Basic precision test for double and long double");
45272343Sngie}
46272343Sngie
47272343Sngievolatile double x = 1;
48272343Sngievolatile long double y = 1;
49272343Sngie
50272343SngieATF_TC_BODY(t_precision, tc)
51272343Sngie{
52272343Sngie	x += DBL_EPSILON;
53272343Sngie	ATF_CHECK(x != 1.0);
54272343Sngie	x -= 1;
55272343Sngie	ATF_CHECK(x == DBL_EPSILON);
56272343Sngie
57272343Sngie	x = 2;
58272343Sngie	x += DBL_EPSILON;
59272343Sngie	ATF_CHECK(x == 2.0);
60272343Sngie
61274597Sngie#if !defined(__FreeBSD__) || !defined(__i386__)
62272343Sngie	y += LDBL_EPSILON;
63272343Sngie	ATF_CHECK(y != 1.0L);
64272343Sngie	y -= 1;
65272343Sngie	ATF_CHECK(y == LDBL_EPSILON);
66272343Sngie	y = 2;
67272343Sngie	y += LDBL_EPSILON;
68272343Sngie	ATF_CHECK(y == 2.0L);
69274597Sngie#endif
70272343Sngie}
71272343Sngie
72272343SngieATF_TP_ADD_TCS(tp)
73272343Sngie{
74272343Sngie	ATF_TP_ADD_TC(tp, t_precision);
75272343Sngie
76272343Sngie	return atf_no_error();
77272343Sngie}
78