| /* |
| 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/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) |
| { |
| __FLT_RPT_DOMAIN ("acosh", x, 0.0, x); |
| return x; |
| } |
| else if (x < __FLT_CST(1.0)) |
| { |
| __FLT_RPT_DOMAIN ("acosh", x, 0.0, __FLT_NAN); |
| return __FLT_NAN; |
| } |
| else if (x_class == FP_INFINITE) |
| { |
| return INFINITY; |
| } |
| |
| 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)))); |
| } |
| |