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 #include <fenv.h> 33 #include <float.h> 34 #include <math.h> 35 #include <stdio.h> 36 37 #include "test-utils.h" 38 39 #pragma STDC FENV_ACCESS ON 40 41 /* 42 * Test whether func(x, y) has the expected result, and make sure no 43 * exceptions are raised. 44 */ 45 #define TEST(func, type, x, y, expected, rmode) do { \ 46 type __x = (x); /* convert before we clear exceptions */ \ 47 type __y = (y); \ 48 ATF_REQUIRE_EQ(0, feclearexcept(ALL_STD_EXCEPT)); \ 49 long double __result = func((__x), (__y)); \ 50 CHECK_FP_EXCEPTIONS_MSG(0, ALL_STD_EXCEPT, \ 51 #func "(%.20Lg, %.20Lg) rmode%d", (x), (y), rmode); \ 52 ATF_CHECK_MSG(fpequal_cs(__result, (expected), true), \ 53 #func "(%.20Lg, %.20Lg) rmode%d = %.20Lg, expected %.20Lg\n", \ 54 (x), (y), rmode, __result, (expected)); \ 55 } while (0) 56 57 static void 58 testall_r(long double big, long double small, int rmode) 59 { 60 long double expected_max = isnan(big) ? small : big; 61 long double expected_min = isnan(small) ? big : small; 62 TEST(fmaxf, float, big, small, expected_max, rmode); 63 TEST(fmaxf, float, small, big, expected_max, rmode); 64 TEST(fmax, double, big, small, expected_max, rmode); 65 TEST(fmax, double, small, big, expected_max, rmode); 66 TEST(fmaxl, long double, big, small, expected_max, rmode); 67 TEST(fmaxl, long double, small, big, expected_max, rmode); 68 TEST(fminf, float, big, small, expected_min, rmode); 69 TEST(fminf, float, small, big, expected_min, rmode); 70 TEST(fmin, double, big, small, expected_min, rmode); 71 TEST(fmin, double, small, big, expected_min, rmode); 72 TEST(fminl, long double, big, small, expected_min, rmode); 73 TEST(fminl, long double, small, big, expected_min, rmode); 74 } 75 76 /* 77 * Test all the functions: fmaxf, fmax, fmaxl, fminf, fmin, and fminl, 78 * in all rounding modes and with the arguments in different orders. 79 * The input 'big' must be >= 'small'. 80 */ 81 static void 82 testall(long double big, long double small) 83 { 84 static const int rmodes[] = { 85 FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO 86 }; 87 int i; 88 89 for (i = 0; i < 4; i++) { 90 fesetround(rmodes[i]); 91 testall_r(big, small, rmodes[i]); 92 } 93 } 94 95 ATF_TC_WITHOUT_HEAD(test1); 96 ATF_TC_BODY(test1, tc) 97 { 98 testall(1.0, 0.0); 99 } 100 101 ATF_TC_WITHOUT_HEAD(test2); 102 ATF_TC_BODY(test2, tc) 103 { 104 testall(42.0, nextafterf(42.0, -INFINITY)); 105 } 106 ATF_TC_WITHOUT_HEAD(test3); 107 ATF_TC_BODY(test3, tc) 108 { 109 testall(nextafterf(42.0, INFINITY), 42.0); 110 } 111 112 ATF_TC_WITHOUT_HEAD(test4); 113 ATF_TC_BODY(test4, tc) 114 { 115 testall(-5.0, -5.0); 116 } 117 118 ATF_TC_WITHOUT_HEAD(test5); 119 ATF_TC_BODY(test5, tc) 120 { 121 testall(-3.0, -4.0); 122 } 123 124 ATF_TC_WITHOUT_HEAD(test6); 125 ATF_TC_BODY(test6, tc) 126 { 127 testall(1.0, NAN); 128 } 129 ATF_TC_WITHOUT_HEAD(test7); 130 ATF_TC_BODY(test7, tc) 131 { 132 testall(INFINITY, NAN); 133 } 134 135 ATF_TC_WITHOUT_HEAD(test8); 136 ATF_TC_BODY(test8, tc) 137 { 138 testall(INFINITY, 1.0); 139 } 140 141 ATF_TC_WITHOUT_HEAD(test9); 142 ATF_TC_BODY(test9, tc) 143 { 144 testall(-3.0, -INFINITY); 145 } 146 147 ATF_TC_WITHOUT_HEAD(test10); 148 ATF_TC_BODY(test10, tc) 149 { 150 testall(3.0, -INFINITY); 151 } 152 153 ATF_TC_WITHOUT_HEAD(test11); 154 ATF_TC_BODY(test11, tc) 155 { 156 testall(NAN, NAN); 157 } 158 159 ATF_TC_WITHOUT_HEAD(test12); 160 ATF_TC_BODY(test12, tc) 161 { 162 /* This test isn't strictly required to work by C99. */ 163 testall(0.0, -0.0); 164 } 165 166 167 ATF_TP_ADD_TCS(tp) 168 { 169 ATF_TP_ADD_TC(tp, test1); 170 ATF_TP_ADD_TC(tp, test2); 171 ATF_TP_ADD_TC(tp, test3); 172 ATF_TP_ADD_TC(tp, test4); 173 ATF_TP_ADD_TC(tp, test5); 174 ATF_TP_ADD_TC(tp, test6); 175 ATF_TP_ADD_TC(tp, test7); 176 ATF_TP_ADD_TC(tp, test8); 177 ATF_TP_ADD_TC(tp, test9); 178 ATF_TP_ADD_TC(tp, test10); 179 ATF_TP_ADD_TC(tp, test11); 180 ATF_TP_ADD_TC(tp, test12); 181 182 return (atf_no_error()); 183 } 184