71 lines
2.8 KiB
C
71 lines
2.8 KiB
C
/*
|
|
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,
|
|
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.
|
|
*/
|
|
|
|
#include "complex_internal.h"
|
|
#include <errno.h>
|
|
#include "fastmath.h"
|
|
|
|
__FLT_TYPE
|
|
__FLT_ABI(acosh) (__FLT_TYPE x)
|
|
{
|
|
int x_class = fpclassify (x);
|
|
if (x_class == FP_NAN || x < __FLT_CST(1.0))
|
|
{
|
|
__FLT_RPT_DOMAIN ("acosh", x, 0.0, __FLT_NAN);
|
|
return __FLT_NAN;
|
|
}
|
|
else if (x_class == FP_INFINITE)
|
|
{
|
|
__FLT_RPT_DOMAIN ("acosh", x, 0.0, __FLT_NAN);
|
|
return __FLT_NAN;
|
|
}
|
|
|
|
if (x > __FLT_CST(0x1p32))
|
|
return __FLT_ABI (__fast_log) (x) + 6.9314718055994530941723E-1L;
|
|
|
|
return __FLT_ABI (__fast_log) (x +
|
|
__FLT_ABI (__fast_sqrt) ((x + __FLT_CST(1.0)) * (x - __FLT_CST(1.0))));
|
|
}
|
|
|