math/test-signgam-finite-c99.c

   1 /* Test lgamma functions do not set signgam for -ffinite-math-only for ISO C.
   2    Copyright (C) 2015-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #undef _LIBC
  20 #undef _GNU_SOURCE
  21 #undef _Mlong_double_
  22 #define _ISOMAC
  23
  24 #include <math.h>
  25 #include <stdio.h>
  26
  27 int signgam;
  28
  29 #define RUN_TESTS(FUNC, TYPE)                                   \
  30   do                                                            \
  31     {                                                           \
  32       volatile TYPE a, b, c __attribute__ ((unused));           \
  33       a = 0.5;                                                  \
  34       b = -0.5;                                                 \
  35       signgam = 123;                                            \
  36       c = FUNC (a);                                             \
  37       if (signgam == 123)                                       \
  38         puts ("PASS: " #FUNC " (0.5) setting signgam");         \
  39       else                                                      \
  40         {                                                       \
  41           puts ("FAIL: " #FUNC " (0.5) setting signgam");       \
  42           result = 1;                                           \
  43         }                                                       \
  44       signgam = 123;                                            \
  45       c = FUNC (b);                                             \
  46       if (signgam == 123)                                       \
  47         puts ("PASS: " #FUNC " (-0.5) setting signgam");        \
  48       else                                                      \
  49         {                                                       \
  50           puts ("FAIL: " #FUNC " (-0.5) setting signgam");      \
  51           result = 1;                                           \
  52         }                                                       \
  53     }                                                           \
  54   while (0)
  55
  56 int
  57 main (void)
  58 {
  59   int result = 0;
  60   RUN_TESTS (lgammaf, float);
  61   RUN_TESTS (lgamma, double);
  62 #ifndef NO_LONG_DOUBLE
  63   RUN_TESTS (lgammal, long double);
  64 #endif
  65   return result;
  66 }