2 * Copyright (c) 2008 David Schultz <das@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
28 * Tests for fmax{,f,l}() and fmin{,f,l}.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
39 #include "test-utils.h"
41 #pragma STDC FENV_ACCESS ON
44 * Test whether func(x, y) has the expected result, and make sure no
45 * exceptions are raised.
47 #define TEST(func, type, x, y, expected) do { \
48 type __x = (x); /* convert before we clear exceptions */ \
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)); \
57 if (!fpequal(__result, (expected))) { \
58 fprintf(stderr, #func "(%.20Lg, %.20Lg) = %.20Lg, " \
59 "expected %.20Lg\n", (x), (y), __result, (expected)); \
65 testall_r(long double big, long double small)
69 long double expected_max = isnan(big) ? small : big;
70 long double expected_min = isnan(small) ? big : small;
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);
89 static const char *comment = NULL;
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'.
97 testall(int testnum, long double big, long double small)
99 static const int rmodes[] = {
100 FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO
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",
112 printf("%sok %d - big = %.20Lg, small = %.20Lg%s\n",
113 (i == 4) ? "" : "not ", testnum, big, small,
114 comment == NULL ? "" : comment);
117 /* Clang 3.8.0+ fails the invariants for testcase 6, 7, 10, and 11. */
118 #if defined(__clang__) && \
119 ((__clang_major__ > 3)) || \
120 ((__clang_major__ == 3 && __clang_minor__ >= 8))
121 #define affected_by_bug_208703
130 testall(1, 1.0, 0.0);
131 testall(2, 42.0, nextafterf(42.0, -INFINITY));
132 testall(3, nextafterf(42.0, INFINITY), 42.0);
133 testall(4, -5.0, -5.0);
134 testall(5, -3.0, -4.0);
135 #ifdef affected_by_bug_208703
136 comment = "# TODO: testcase 6-7 fails invariant with clang 3.8+ (bug 208703)";
138 testall(6, 1.0, NAN);
139 testall(7, INFINITY, NAN);
141 testall(8, INFINITY, 1.0);
142 testall(9, -3.0, -INFINITY);
143 testall(10, 3.0, -INFINITY);
144 #ifdef affected_by_bug_208703
145 comment = "# TODO: testcase 11-12 fails invariant with clang 3.8+ (bug 208703)";
147 testall(11, NAN, NAN);
149 /* This test isn't strictly required to work by C99. */
150 testall(12, 0.0, -0.0);