gcc/testsuite/gcc.dg/builtins-65.c

   1 /* { dg-do link } */
   2 /* { dg-options "-O2 -ffast-math" } */
   3 /* { dg-require-effective-target c99_runtime } */
   4
   5 extern int ilogbf (float);
   6 extern float logbf (float);
   7 extern int ilogb (double);
   8 extern double logb (double);
   9 extern int ilogbl (long double);
  10 extern long double logbl (long double);
  11
  12 extern void link_error(void);
  13
  14 void testf(float x)
  15 {
  16   if ((int) logbf (x) != ilogbf (x))
  17     link_error ();
  18 }
  19
  20 void test(double x)
  21 {
  22   if ((int) logb (x) != ilogb (x))
  23     link_error ();
  24 }
  25
  26 void testl(long double x)
  27 {
  28   if ((int) logbl (x) != ilogbl (x))
  29     link_error ();
  30 }
  31
  32 int main()
  33 {
  34   testf (2.0f);
  35   test (2.0);
  36   testl (2.0l);
  37
  38   return 0;
  39 }
  40