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) do { \ 48 type __x = (x); /* convert before we clear exceptions */ \ 49 type __y = (y); \ 50 feclearexcept(ALL_STD_EXCEPT); \ 51 long double __result = func((__x), (__y)); \ 52 if (fetestexcept(ALL_STD_EXCEPT)) { \ 53 fprintf(stderr, #func "(%.20Lg, %.20Lg) raised 0x%x\n", \ 54 (x), (y), fetestexcept(FE_ALL_EXCEPT)); \ 55 ok = 0; \ 56 } \ 57 if (!fpequal(__result, (expected))) { \ 58 fprintf(stderr, #func "(%.20Lg, %.20Lg) = %.20Lg, " \ 59 "expected %.20Lg\n", (x), (y), __result, (expected)); \ 60 ok = 0; \ 61 } \ 62 } while (0) 63 64 int 65 testall_r(long double big, long double small) 66 { 67 int ok; 68 69 long double expected_max = isnan(big) ? small : big; 70 long double expected_min = isnan(small) ? big : small; 71 ok = 1; 72 73 TEST(fmaxf, float, big, small, expected_max); 74 TEST(fmaxf, float, small, big, expected_max); 75 TEST(fmax, double, big, small, expected_max); 76 TEST(fmax, double, small, big, expected_max); 77 TEST(fmaxl, long double, big, small, expected_max); 78 TEST(fmaxl, long double, small, big, expected_max); 79 TEST(fminf, float, big, small, expected_min); 80 TEST(fminf, float, small, big, expected_min); 81 TEST(fmin, double, big, small, expected_min); 82 TEST(fmin, double, small, big, expected_min); 83 TEST(fminl, long double, big, small, expected_min); 84 TEST(fminl, long double, small, big, expected_min); 85 86 return (ok); 87 } 88 89 const char *comment = NULL; 90 91 /* 92 * Test all the functions: fmaxf, fmax, fmaxl, fminf, fmin, and fminl, 93 * in all rounding modes and with the arguments in different orders. 94 * The input 'big' must be >= 'small'. 95 */ 96 void 97 testall(int testnum, long double big, long double small) 98 { 99 static const int rmodes[] = { 100 FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO 101 }; 102 int i; 103 104 for (i = 0; i < 4; i++) { 105 fesetround(rmodes[i]); 106 if (!testall_r(big, small)) { 107 fprintf(stderr, "FAILURE in rounding mode %d\n", 108 rmodes[i]); 109 break; 110 } 111 } 112 printf("%sok %d - big = %.20Lg, small = %.20Lg%s\n", 113 (i == 4) ? "" : "not ", testnum, big, small, 114 comment == NULL ? "" : comment); 115 } 116 117 /* Clang 3.8.0+ fails the invariants for testcase 6, 7, 10, and 11. */ 118 #if defined(__clang__) && \ 119 (__clang_major__ >= 3 && __clang_minor__ >= 8 && __clang_patchlevel__ >= 0) 120 #define affected_by_bug_208703 121 #endif 122 123 int 124 main(int argc, char *argv[]) 125 { 126 127 printf("1..12\n"); 128 129 testall(1, 1.0, 0.0); 130 testall(2, 42.0, nextafterf(42.0, -INFINITY)); 131 testall(3, nextafterf(42.0, INFINITY), 42.0); 132 testall(4, -5.0, -5.0); 133 testall(5, -3.0, -4.0); 134 #ifdef affected_by_bug_208703 135 comment = "# TODO: testcase 6-7 fails invariant with clang 3.8+ (bug 208703)"; 136 #endif 137 testall(6, 1.0, NAN); 138 testall(7, INFINITY, NAN); 139 comment = NULL; 140 testall(8, INFINITY, 1.0); 141 testall(9, -3.0, -INFINITY); 142 testall(10, 3.0, -INFINITY); 143 #ifdef affected_by_bug_208703 144 comment = "# TODO: testcase 11-12 fails invariant with clang 3.8+ (bug 208703)"; 145 #endif 146 testall(11, NAN, NAN); 147 148 /* This test isn't strictly required to work by C99. */ 149 testall(12, 0.0, -0.0); 150 comment = NULL; 151 152 return (0); 153 } 154