1 /* Test of ldexp*() function family. 2 Copyright (C) 2012-2021 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 static void test_function(void)18test_function (void) 19 { 20 int exp; 21 22 /* [MX] shaded specification in POSIX. */ 23 24 /* NaN. */ 25 for (exp = -100000; exp <= 100000; exp += 100000) 26 ASSERT (ISNAN (LDEXP (NAN, exp))); 27 28 /* Signed zero. */ 29 for (exp = -100000; exp <= 100000; exp += 100000) 30 { 31 DOUBLE z = LDEXP (L_(0.0), exp); 32 ASSERT (z == L_(0.0)); 33 ASSERT (!signbit (z)); 34 } 35 for (exp = -100000; exp <= 100000; exp += 100000) 36 { 37 DOUBLE z = LDEXP (MINUS_ZERO, exp); 38 ASSERT (z == L_(0.0)); 39 ASSERT (!!signbit (z) == !!signbit (MINUS_ZERO)); 40 } 41 42 /* Infinity. */ 43 for (exp = -100000; exp <= 100000; exp += 100000) 44 ASSERT (LDEXP (INFINITY, exp) == INFINITY); 45 for (exp = -100000; exp <= 100000; exp += 100000) 46 ASSERT (LDEXP (- INFINITY, exp) == - INFINITY); 47 } 48