t_precision.c revision 274079
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 61272343Sngie y += LDBL_EPSILON; 62272343Sngie ATF_CHECK(y != 1.0L); 63272343Sngie y -= 1; 64272343Sngie ATF_CHECK(y == LDBL_EPSILON); 65272343Sngie y = 2; 66272343Sngie y += LDBL_EPSILON; 67272343Sngie ATF_CHECK(y == 2.0L); 68272343Sngie} 69272343Sngie 70272343SngieATF_TP_ADD_TCS(tp) 71272343Sngie{ 72272343Sngie ATF_TP_ADD_TC(tp, t_precision); 73272343Sngie 74272343Sngie return atf_no_error(); 75272343Sngie} 76