third-party-mirror / GRTEv4 / 262be5abc585813b1766119db73641d44ba3741e / . / google3 / third_party / grte / v4_src / glibc-2.19 / math / test-powl.c

/* Test for powl | |

Copyright (C) 2011-2014 Free Software Foundation, Inc. | |

This file is part of the GNU C Library. | |

The GNU C Library is free software; you can redistribute it and/or | |

modify it under the terms of the GNU Lesser General Public | |

License as published by the Free Software Foundation; either | |

version 2.1 of the License, or (at your option) any later version. | |

The GNU C Library is distributed in the hope that it will be useful, | |

but WITHOUT ANY WARRANTY; without even the implied warranty of | |

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |

Lesser General Public License for more details. | |

You should have received a copy of the GNU Lesser General Public | |

License along with the GNU C Library; if not, see | |

<http://www.gnu.org/licenses/>. */ | |

#include <stdio.h> | |

#include <math.h> | |

#include <float.h> | |

#include <ieee754.h> | |

int | |

main (void) | |

{ | |

int result = 0; | |

#ifndef NO_LONG_DOUBLE | |

# if LDBL_MANT_DIG == 64 | |

{ | |

long double x = 1e-20; | |

union ieee854_long_double u; | |

u.ieee.mantissa0 = 1; | |

u.ieee.mantissa1 = 1; | |

u.ieee.exponent = 0; | |

u.ieee.negative = 0; | |

(void) powl (0.2, u.d); | |

x = powl (x, 1.5); | |

if (fabsl (x - 1e-30) > 1e-10) | |

{ | |

printf ("powl (1e-20, 1.5): wrong result: %Lg\n", x); | |

result = 1; | |

} | |

} | |

# endif | |

#endif | |

return result; | |

} |