| /* Test of log2*() function family. |
| Copyright (C) 2012-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| static void |
| test_function (void) |
| { |
| /* [MX] shaded specification in POSIX. */ |
| |
| /* Negative arguments. */ |
| ASSERT (ISNAN (LOG2 (- L_(0.00001)))); |
| ASSERT (ISNAN (LOG2 (- L_(1.0)))); |
| ASSERT (ISNAN (LOG2 (- L_(1000000.0)))); |
| ASSERT (ISNAN (LOG2 (- INFINITY))); |
| |
| /* NaN. */ |
| ASSERT (ISNAN (LOG2 (NAN))); |
| |
| /* Only rational value. */ |
| { |
| DOUBLE z = LOG2 (L_(1.0)); |
| ASSERT (z == L_(0.0)); |
| ASSERT (!signbit (z)); |
| } |
| |
| /* Infinity. */ |
| ASSERT (LOG2 (INFINITY) == INFINITY); |
| } |