/*- * Copyright (c) 2008 David Schultz <das@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Tests for fmax{,f,l}() and fmin{,f,l}. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <fenv.h> #include <float.h> #include <math.h> #include <stdio.h> #include "test-utils.h" #pragma STDC FENV_ACCESS ON /* * Test whether func(x, y) has the expected result, and make sure no * exceptions are raised. */ #define TEST(func, type, x, y, expected) do { \ type __x = (x); /* convert before we clear exceptions */ \ type __y = (y); \ feclearexcept(ALL_STD_EXCEPT); \ long double __result = func((__x), (__y)); \ if (fetestexcept(ALL_STD_EXCEPT)) { \ fprintf(stderr, #func "(%.20Lg, %.20Lg) raised 0x%x\n", \ (x), (y), fetestexcept(FE_ALL_EXCEPT)); \ ok = 0; \ } \ if (!fpequal(__result, (expected))) { \ fprintf(stderr, #func "(%.20Lg, %.20Lg) = %.20Lg, " \ "expected %.20Lg\n", (x), (y), __result, (expected)); \ ok = 0; \ } \ } while (0) int testall_r(long double big, long double small) { int ok; long double expected_max = isnan(big) ? small : big; long double expected_min = isnan(small) ? big : small; ok = 1; TEST(fmaxf, float, big, small, expected_max); TEST(fmaxf, float, small, big, expected_max); TEST(fmax, double, big, small, expected_max); TEST(fmax, double, small, big, expected_max); TEST(fmaxl, long double, big, small, expected_max); TEST(fmaxl, long double, small, big, expected_max); TEST(fminf, float, big, small, expected_min); TEST(fminf, float, small, big, expected_min); TEST(fmin, double, big, small, expected_min); TEST(fmin, double, small, big, expected_min); TEST(fminl, long double, big, small, expected_min); TEST(fminl, long double, small, big, expected_min); return (ok); } /* * Test all the functions: fmaxf, fmax, fmaxl, fminf, fmin, and fminl, * in all rounding modes and with the arguments in different orders. * The input 'big' must be >= 'small'. */ void testall(int testnum, long double big, long double small) { static const int rmodes[] = { FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO }; int i; for (i = 0; i < 4; i++) { fesetround(rmodes[i]); if (!testall_r(big, small)) { fprintf(stderr, "FAILURE in rounding mode %d\n", rmodes[i]); break; } } printf("%sok %d - big = %.20Lg, small = %.20Lg\n", (i == 4) ? "" : "not ", testnum, big, small); } int main(int argc, char *argv[]) { printf("1..12\n"); testall(1, 1.0, 0.0); testall(2, 42.0, nextafterf(42.0, -INFINITY)); testall(3, nextafterf(42.0, INFINITY), 42.0); testall(4, -5.0, -5.0); testall(5, -3.0, -4.0); testall(6, 1.0, NAN); testall(7, INFINITY, NAN); testall(8, INFINITY, 1.0); testall(9, -3.0, -INFINITY); testall(10, 3.0, -INFINITY); testall(11, NAN, NAN); /* This test isn't strictly required to work by C99. */ testall(12, 0.0, -0.0); return (0); }