1 /* $NetBSD: t_precision.c,v 1.3 2016/08/27 10:07:05 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Joerg Sonnenberger. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: t_precision.c,v 1.3 2016/08/27 10:07:05 christos Exp $"); 33 34 #include <atf-c.h> 35 36 #include <float.h> 37 #include <stdlib.h> 38 39 ATF_TC(t_precision); 40 41 ATF_TC_HEAD(t_precision, tc) 42 { 43 atf_tc_set_md_var(tc, "descr", 44 "Basic precision test for double and long double"); 45 } 46 47 volatile double x = 1; 48 #if __HAVE_LONG_DOUBLE 49 volatile long double y = 1; 50 #endif 51 52 ATF_TC_BODY(t_precision, tc) 53 { 54 x += DBL_EPSILON; 55 ATF_CHECK(x != 1.0); 56 x -= 1; 57 ATF_CHECK(x == DBL_EPSILON); 58 59 x = 2; 60 x += DBL_EPSILON; 61 ATF_CHECK(x == 2.0); 62 63 #if __HAVE_LONG_DOUBLE 64 y += LDBL_EPSILON; 65 ATF_CHECK(y != 1.0L); 66 y -= 1; 67 ATF_CHECK(y == LDBL_EPSILON); 68 y = 2; 69 y += LDBL_EPSILON; 70 ATF_CHECK(y == 2.0L); 71 #endif 72 } 73 74 ATF_TP_ADD_TCS(tp) 75 { 76 ATF_TP_ADD_TC(tp, t_precision); 77 78 return atf_no_error(); 79 } 80