gcc/testsuite/gcc.dg/builtins-32.c

   1 /* Copyright (C) 2004 Free Software Foundation.
   2
   3    Check that constant folding of signbit, signbitf and signbitl math
   4    functions doesn't break anything and produces the expected results.
   5
   6    Written by Roger Sayle, 28th January 2004.  */
   7
   8 /* { dg-do run } */
   9 /* { dg-options "-O2" } */
  10
  11 extern void abort(void);
  12
  13 extern int signbit(double);
  14 extern int signbitf(float);
  15 extern int signbitl(long double);
  16
  17 int test (double x)
  18 {
  19   return signbit(x);
  20 }
  21
  22 int testf (float x)
  23 {
  24   return signbitf(x);
  25 }
  26
  27 int testl (long double x)
  28 {
  29   return signbitl(x);
  30 }
  31
  32
  33 int main()
  34 {
  35   if (test (0.0) != 0)
  36     abort ();
  37   if (test (1.0) != 0)
  38     abort ();
  39   if (test (-2.0) == 0)
  40     abort ();
  41
  42   if (testf (0.0f) != 0)
  43     abort ();
  44   if (testf (1.0f) != 0)
  45     abort ();
  46   if (testf (-2.0f) == 0)
  47     abort ();
  48
  49   if (testl (0.0l) != 0)
  50     abort ();
  51   if (testl (1.0l) != 0)
  52     abort ();
  53   if (testl (-2.0l) == 0)
  54     abort ();
  55
  56   return 0;
  57 }
  58