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review.gerrithub.io / AOSPAL / android_bionic / 04583ce9b94d6f41f4c1e66939c4ca2ee41ff058 / . / libm / fpmath.h

/*- | |

* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org> | |

* Copyright (c) 2002 David Schultz <das@FreeBSD.ORG> | |

* All rights reserved. | |

* | |

* Redistribution and use in source and binary forms, with or without | |

* modification, are permitted provided that the following conditions | |

* are met: | |

* 1. Redistributions of source code must retain the above copyright | |

* notice, this list of conditions and the following disclaimer. | |

* 2. Redistributions in binary form must reproduce the above copyright | |

* notice, this list of conditions and the following disclaimer in the | |

* documentation and/or other materials provided with the distribution. | |

* | |

* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |

* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |

* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |

* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |

* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |

* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |

* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |

* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |

* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |

* SUCH DAMAGE. | |

* | |

* $FreeBSD: src/lib/libc/include/fpmath.h,v 1.3 2005/02/06 03:23:31 das Exp $ | |

*/ | |

#include <endian.h> | |

#include "_fpmath.h" | |

union IEEEf2bits { | |

float f; | |

struct { | |

#if __BYTE_ORDER == __LITTLE_ENDIAN | |

unsigned int man :23; | |

unsigned int exp :8; | |

unsigned int sign :1; | |

#else /* _BIG_ENDIAN */ | |

unsigned int sign :1; | |

unsigned int exp :8; | |

unsigned int man :23; | |

#endif | |

} bits; | |

}; | |

#define DBL_MANH_SIZE 20 | |

#define DBL_MANL_SIZE 32 | |

union IEEEd2bits { | |

double d; | |

struct { | |

/* #ifdef __ARMEB__ */ | |

#if (__BYTE_ORDER == __BIG_ENDIAN) || (defined(__arm__) && !defined(__VFP_FP__)) | |

unsigned int manh :20; | |

unsigned int exp :11; | |

unsigned int sign :1; | |

unsigned int manl :32; | |

#elif __BYTE_ORDER == __LITTLE_ENDIAN | |

unsigned int manl :32; | |

unsigned int manh :20; | |

unsigned int exp :11; | |

unsigned int sign :1; | |

#elif __BYTE_ORDER == __BIG_ENDIAN | |

unsigned int sign :1; | |

unsigned int exp :11; | |

unsigned int manh :20; | |

unsigned int manl :32; | |

#endif | |

} bits; | |

}; | |

/* | |

* The BSD "long double" functions are broken when sizeof(long double) == sizeof(double). | |

* Android works around those cases by replacing the broken functions with our own trivial stubs | |

* that call the regular "double" function. | |

*/ | |

#define __fpclassifyl __broken__fpclassify | |

#define __isfinitel __broken__isfinitel | |

#define __isinfl __broken__isinfl | |

#define __isnanl __broken__isnanl | |

#define __isnormall __broken__isnormall | |

#define __signbitl __broken_signbitl |