| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Return arc hyperbole sine for long double value. |
| 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <complex.h> |
| 21 | #include <math.h> |
| 22 | #include <math_private.h> |
| 23 | |
| 24 | __complex__ long double |
| 25 | __casinhl (__complex__ long double x) |
| 26 | { |
| 27 | __complex__ long double res; |
| 28 | int rcls = fpclassify (__real__ x); |
| 29 | int icls = fpclassify (__imag__ x); |
| 30 | |
| 31 | if (rcls <= FP_INFINITE || icls <= FP_INFINITE) |
| 32 | { |
| 33 | if (icls == FP_INFINITE) |
| 34 | { |
| 35 | __real__ res = __copysignl (HUGE_VALL, __real__ x); |
| 36 | |
| 37 | if (rcls == FP_NAN) |
| 38 | __imag__ res = __nanl (""); |
| 39 | else |
| 40 | __imag__ res = __copysignl (rcls >= FP_ZERO ? M_PI_2l : M_PI_4l, |
| 41 | __imag__ x); |
| 42 | } |
| 43 | else if (rcls <= FP_INFINITE) |
| 44 | { |
| 45 | __real__ res = __real__ x; |
| 46 | if ((rcls == FP_INFINITE && icls >= FP_ZERO) |
| 47 | || (rcls == FP_NAN && icls == FP_ZERO)) |
| 48 | __imag__ res = __copysignl (0.0, __imag__ x); |
| 49 | else |
| 50 | __imag__ res = __nanl (""); |
| 51 | } |
| 52 | else |
| 53 | { |
| 54 | __real__ res = __nanl (""); |
| 55 | __imag__ res = __nanl (""); |
| 56 | } |
| 57 | } |
| 58 | else if (rcls == FP_ZERO && icls == FP_ZERO) |
| 59 | { |
| 60 | res = x; |
| 61 | } |
| 62 | else |
| 63 | { |
| 64 | res = __kernel_casinhl (x, 0); |
| 65 | } |
| 66 | |
| 67 | return res; |
| 68 | } |
| 69 | weak_alias (__casinhl, casinhl) |