1 /*- 2 * Copyright (c) 2008 David Schultz <das@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Tests for fmax{,f,l}() and fmin{,f,l}. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <fenv.h> 35 #include <float.h> 36 #include <math.h> 37 #include <stdio.h> 38 39 #include "test-utils.h" 40 41 #pragma STDC FENV_ACCESS ON 42 43 /* 44 * Test whether func(x, y) has the expected result, and make sure no 45 * exceptions are raised. 46 */ 47 #define TEST(func, type, x, y, expected, rmode) do { \ 48 type __x = (x); /* convert before we clear exceptions */ \ 49 type __y = (y); \ 50 ATF_REQUIRE_EQ(0, feclearexcept(ALL_STD_EXCEPT)); \ 51 long double __result = func((__x), (__y)); \ 52 CHECK_FP_EXCEPTIONS_MSG(0, ALL_STD_EXCEPT, \ 53 #func "(%.20Lg, %.20Lg) rmode%d", (x), (y), rmode); \ 54 ATF_CHECK_MSG(fpequal_cs(__result, (expected), true), \ 55 #func "(%.20Lg, %.20Lg) rmode%d = %.20Lg, expected %.20Lg\n", \ 56 (x), (y), rmode, __result, (expected)); \ 57 } while (0) 58 59 static void 60 testall_r(long double big, long double small, int rmode) 61 { 62 long double expected_max = isnan(big) ? small : big; 63 long double expected_min = isnan(small) ? big : small; 64 TEST(fmaxf, float, big, small, expected_max, rmode); 65 TEST(fmaxf, float, small, big, expected_max, rmode); 66 TEST(fmax, double, big, small, expected_max, rmode); 67 TEST(fmax, double, small, big, expected_max, rmode); 68 TEST(fmaxl, long double, big, small, expected_max, rmode); 69 TEST(fmaxl, long double, small, big, expected_max, rmode); 70 TEST(fminf, float, big, small, expected_min, rmode); 71 TEST(fminf, float, small, big, expected_min, rmode); 72 TEST(fmin, double, big, small, expected_min, rmode); 73 TEST(fmin, double, small, big, expected_min, rmode); 74 TEST(fminl, long double, big, small, expected_min, rmode); 75 TEST(fminl, long double, small, big, expected_min, rmode); 76 } 77 78 /* 79 * Test all the functions: fmaxf, fmax, fmaxl, fminf, fmin, and fminl, 80 * in all rounding modes and with the arguments in different orders. 81 * The input 'big' must be >= 'small'. 82 */ 83 static void 84 testall(long double big, long double small) 85 { 86 static const int rmodes[] = { 87 FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO 88 }; 89 int i; 90 91 for (i = 0; i < 4; i++) { 92 fesetround(rmodes[i]); 93 testall_r(big, small, rmodes[i]); 94 } 95 } 96 97 ATF_TC_WITHOUT_HEAD(test1); 98 ATF_TC_BODY(test1, tc) 99 { 100 testall(1.0, 0.0); 101 } 102 103 ATF_TC_WITHOUT_HEAD(test2); 104 ATF_TC_BODY(test2, tc) 105 { 106 testall(42.0, nextafterf(42.0, -INFINITY)); 107 } 108 ATF_TC_WITHOUT_HEAD(test3); 109 ATF_TC_BODY(test3, tc) 110 { 111 testall(nextafterf(42.0, INFINITY), 42.0); 112 } 113 114 ATF_TC_WITHOUT_HEAD(test4); 115 ATF_TC_BODY(test4, tc) 116 { 117 testall(-5.0, -5.0); 118 } 119 120 ATF_TC_WITHOUT_HEAD(test5); 121 ATF_TC_BODY(test5, tc) 122 { 123 testall(-3.0, -4.0); 124 } 125 126 ATF_TC_WITHOUT_HEAD(test6); 127 ATF_TC_BODY(test6, tc) 128 { 129 testall(1.0, NAN); 130 } 131 ATF_TC_WITHOUT_HEAD(test7); 132 ATF_TC_BODY(test7, tc) 133 { 134 testall(INFINITY, NAN); 135 } 136 137 ATF_TC_WITHOUT_HEAD(test8); 138 ATF_TC_BODY(test8, tc) 139 { 140 testall(INFINITY, 1.0); 141 } 142 143 ATF_TC_WITHOUT_HEAD(test9); 144 ATF_TC_BODY(test9, tc) 145 { 146 testall(-3.0, -INFINITY); 147 } 148 149 ATF_TC_WITHOUT_HEAD(test10); 150 ATF_TC_BODY(test10, tc) 151 { 152 testall(3.0, -INFINITY); 153 } 154 155 ATF_TC_WITHOUT_HEAD(test11); 156 ATF_TC_BODY(test11, tc) 157 { 158 testall(NAN, NAN); 159 } 160 161 ATF_TC_WITHOUT_HEAD(test12); 162 ATF_TC_BODY(test12, tc) 163 { 164 /* This test isn't strictly required to work by C99. */ 165 testall(0.0, -0.0); 166 } 167 168 169 ATF_TP_ADD_TCS(tp) 170 { 171 ATF_TP_ADD_TC(tp, test1); 172 ATF_TP_ADD_TC(tp, test2); 173 ATF_TP_ADD_TC(tp, test3); 174 ATF_TP_ADD_TC(tp, test4); 175 ATF_TP_ADD_TC(tp, test5); 176 ATF_TP_ADD_TC(tp, test6); 177 ATF_TP_ADD_TC(tp, test7); 178 ATF_TP_ADD_TC(tp, test8); 179 ATF_TP_ADD_TC(tp, test9); 180 ATF_TP_ADD_TC(tp, test10); 181 ATF_TP_ADD_TC(tp, test11); 182 ATF_TP_ADD_TC(tp, test12); 183 184 return (atf_no_error()); 185 } 186