math/test-signgam-finite-c99.c

   1 /* Test lgamma functions do not set signgam for -ffinite-math-only for ISO C.
   2    Copyright (C) 2015-2017 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 __LIBC_INTERNAL_MATH_INLINES
  21 #undef _GNU_SOURCE
  22 #undef _Mlong_double_
  23 #define _ISOMAC
  24
  25 #include <math.h>
  26 #include <stdio.h>
  27
  28 int signgam;
  29
  30 #define RUN_TESTS(FUNC, TYPE)                                   \
  31   do                                                            \
  32     {                                                           \
  33       volatile TYPE a, b, c __attribute__ ((unused));           \
  34       a = 0.5;                                                  \
  35       b = -0.5;                                                 \
  36       signgam = 123;                                            \
  37       c = FUNC (a);                                             \
  38       if (signgam == 123)                                       \
  39         puts ("PASS: " #FUNC " (0.5) setting signgam");         \
  40       else                                                      \
  41         {                                                       \
  42           puts ("FAIL: " #FUNC " (0.5) setting signgam");       \
  43           result = 1;                                           \
  44         }                                                       \
  45       signgam = 123;                                            \
  46       c = FUNC (b);                                             \
  47       if (signgam == 123)                                       \
  48         puts ("PASS: " #FUNC " (-0.5) setting signgam");        \
  49       else                                                      \
  50         {                                                       \
  51           puts ("FAIL: " #FUNC " (-0.5) setting signgam");      \
  52           result = 1;                                           \
  53         }                                                       \
  54     }                                                           \
  55   while (0)
  56
  57 int
  58 main (void)
  59 {
  60   int result = 0;
  61   RUN_TESTS (lgammaf, float);
  62   RUN_TESTS (lgamma, double);
  63 #ifndef NO_LONG_DOUBLE
  64   RUN_TESTS (lgammal, long double);
  65 #endif
  66   return result;
  67 }