gcc/testsuite/gcc.dg/builtins-24.c

   1 /* Copyright (C) 2003 Free Software Foundation.
   2
   3    Check that the RTL expansion of floating point exponentiation by
   4    a constant integer doesn't break anything and produces the expected
   5    results.
   6
   7    Written by Roger Sayle, 20th June 2003.  */
   8
   9 /* { dg-do run } */
  10 /* { dg-options "-O2 -ffast-math" } */
  11
  12 extern double pow(double,double);
  13 extern void abort(void);
  14
  15 double foo (double x)
  16 {
  17   return pow (x, 6);
  18 }
  19
  20 double bar (double x)
  21 {
  22   return pow (x, -4);
  23 }
  24
  25 int main()
  26 {
  27   if (foo (2.0) != 64.0)
  28     abort ();
  29
  30   if (bar (2.0) != 0.0625)
  31     abort ();
  32
  33   return 0;
  34 }
  35