1 /* Test of logb() function. 2 Copyright (C) 2010-2021 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 /* Written by Bruno Haible <bruno@clisp.org>, 2010. */ 18 19 #include <config.h> 20 21 #include <math.h> 22 23 #include "signature.h" 24 SIGNATURE_CHECK (logb, double, (double)); 25 26 #include <float.h> 27 28 #include "minus-zero.h" 29 #include "macros.h" 30 31 #define DOUBLE double 32 /* The use of 'volatile' guarantees that excess precision bits are dropped 33 when dealing with denormalized numbers. It is necessary on x86 systems 34 where double-floats are not IEEE compliant by default, to avoid that the 35 results become platform and compiler option dependent. 'volatile' is a 36 portable alternative to gcc's -ffloat-store option. */ 37 #define VOLATILE volatile 38 #define HUGEVAL HUGE_VAL 39 #define L_(literal) literal 40 #define MINUS_ZERO minus_zerod 41 #define MAX_EXP DBL_MAX_EXP 42 #define MIN_EXP DBL_MIN_EXP 43 #define MIN_NORMAL_EXP DBL_MIN_EXP 44 #define LOGB logb 45 #define RANDOM randomd 46 #include "test-logb.h" 47 48 int 49 main () /* */ 50 { 51 test_function (); 52 53 return 0; 54 }