third-party-mirror / mingw-w64 / 79951edef1e76a79d7ce0fa1cf94391b2f6b3d94 / . / mingw-w64-crt / complex / cacosh.def.h

/* | |

This Software is provided under the Zope Public License (ZPL) Version 2.1. | |

Copyright (c) 2009, 2010 by the mingw-w64 project | |

See the AUTHORS file for the list of contributors to the mingw-w64 project. | |

This license has been certified as open source. It has also been designated | |

as GPL compatible by the Free Software Foundation (FSF). | |

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

modification, are permitted provided that the following conditions are met: | |

1. Redistributions in source code must retain the accompanying copyright | |

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

2. Redistributions in binary form must reproduce the accompanying | |

copyright notice, this list of conditions, and the following disclaimer | |

in the documentation and/or other materials provided with the | |

distribution. | |

3. Names of the copyright holders must not be used to endorse or promote | |

products derived from this software without prior written permission | |

from the copyright holders. | |

4. The right to distribute this software or to use it for any purpose does | |

not give you the right to use Servicemarks (sm) or Trademarks (tm) of | |

the copyright holders. Use of them is covered by separate agreement | |

with the copyright holders. | |

5. If any files are modified, you must cause the modified files to carry | |

prominent notices stating that you changed the files and the date of | |

any change. | |

Disclaimer | |

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESSED | |

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 COPYRIGHT HOLDERS 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, | |

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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |

EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |

*/ | |

__FLT_TYPE __complex__ __cdecl | |

__FLT_ABI(cacosh) (__FLT_TYPE __complex__ z) | |

{ | |

__complex__ __FLT_TYPE ret; | |

__complex__ __FLT_TYPE x; | |

int r_class = fpclassify (__real__ z); | |

int i_class = fpclassify (__imag__ z); | |

if (i_class == FP_INFINITE) | |

{ | |

__real__ ret = __FLT_HUGE_VAL; | |

__imag__ ret = (r_class == FP_NAN ? __FLT_NAN : __FLT_ABI(copysign) ( | |

(r_class == FP_INFINITE ? (__real__ z < __FLT_CST(0.0) ? __FLT_PI_3_4 : __FLT_PI_4) : __FLT_PI_2), __imag__ z)); | |

return ret; | |

} | |

if (r_class == FP_INFINITE) | |

{ | |

__real__ ret = __FLT_HUGE_VAL; | |

__imag__ ret = ((i_class != FP_NAN && i_class != FP_INFINITE) | |

? __FLT_ABI(copysign) (signbit (__real__ z) ? __FLT_PI : __FLT_CST(0.0), __imag__ z) : __FLT_NAN); | |

return ret; | |

} | |

if (r_class == FP_NAN || i_class == FP_NAN) | |

{ | |

__real__ ret = __FLT_NAN; | |

__imag__ ret = __FLT_NAN; | |

return ret; | |

} | |

if (r_class == FP_ZERO && i_class == FP_ZERO) | |

{ | |

__real__ ret = __FLT_CST(0.0); | |

__imag__ ret = __FLT_ABI(copysign) (__FLT_PI_2, __imag__ z); | |

return ret; | |

} | |

__real__ x = (__real__ z - __imag__ z) * (__real__ z + __imag__ z) - __FLT_CST(1.0); | |

__imag__ x = __FLT_CST(2.0) * __real__ z * __imag__ z; | |

x = __FLT_ABI(csqrt) (x); | |

if (__real__ z < __FLT_CST(0.0)) | |

x = -x; | |

__real__ x += __real__ z; | |

__imag__ x += __imag__ z; | |

ret = __FLT_ABI(clog) (x); | |

if (__real__ ret < __FLT_CST(0.0)) | |

ret = -ret; | |

return ret; | |

} |