1 /* Test of log1p*() 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 /* [MX] shaded specification in POSIX. */ 21 22 /* Negative arguments. */ 23 ASSERT (ISNAN (LOG1P (- L_(1.00001)))); 24 ASSERT (ISNAN (LOG1P (- L_(2.0)))); 25 ASSERT (ISNAN (LOG1P (- L_(1000000.0)))); 26 ASSERT (ISNAN (LOG1P (- INFINITY))); 27 28 /* NaN. */ 29 ASSERT (ISNAN (LOG1P (NAN))); 30 31 /* Only rational value. */ 32 { 33 DOUBLE z = LOG1P (L_(0.0)); 34 ASSERT (z == L_(0.0)); 35 ASSERT (!signbit (z)); 36 } 37 { 38 DOUBLE z = LOG1P (MINUS_ZERO); 39 ASSERT (z == L_(0.0)); 40 ASSERT (!!signbit (z) == !!signbit (MINUS_ZERO)); 41 } 42 43 /* Infinity. */ 44 ASSERT (LOG1P (INFINITY) == INFINITY); 45 } 46