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c50eee19 | 1 | /* Return arc hyperbolic sine for a complex float type. |
2b778ceb | 2 | Copyright (C) 1997-2021 Free Software Foundation, Inc. |
ffb84f5e | 3 | This file is part of the GNU C Library. |
ffb84f5e PM |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
ffb84f5e PM |
18 | |
19 | #include <complex.h> | |
20 | #include <math.h> | |
ffb84f5e | 21 | |
c50eee19 PM |
22 | CFLOAT |
23 | M_DECL_FUNC (__casinh) (CFLOAT x) | |
ffb84f5e | 24 | { |
c50eee19 | 25 | CFLOAT res; |
ffb84f5e PM |
26 | int rcls = fpclassify (__real__ x); |
27 | int icls = fpclassify (__imag__ x); | |
28 | ||
29 | if (rcls <= FP_INFINITE || icls <= FP_INFINITE) | |
30 | { | |
31 | if (icls == FP_INFINITE) | |
32 | { | |
c50eee19 | 33 | __real__ res = M_COPYSIGN (M_HUGE_VAL, __real__ x); |
ffb84f5e PM |
34 | |
35 | if (rcls == FP_NAN) | |
c50eee19 | 36 | __imag__ res = M_NAN; |
ffb84f5e | 37 | else |
c50eee19 PM |
38 | __imag__ res = M_COPYSIGN ((rcls >= FP_ZERO |
39 | ? M_MLIT (M_PI_2) : M_MLIT (M_PI_4)), | |
ffb84f5e PM |
40 | __imag__ x); |
41 | } | |
42 | else if (rcls <= FP_INFINITE) | |
43 | { | |
44 | __real__ res = __real__ x; | |
45 | if ((rcls == FP_INFINITE && icls >= FP_ZERO) | |
46 | || (rcls == FP_NAN && icls == FP_ZERO)) | |
c50eee19 | 47 | __imag__ res = M_COPYSIGN (0, __imag__ x); |
ffb84f5e | 48 | else |
c50eee19 | 49 | __imag__ res = M_NAN; |
ffb84f5e PM |
50 | } |
51 | else | |
52 | { | |
c50eee19 PM |
53 | __real__ res = M_NAN; |
54 | __imag__ res = M_NAN; | |
ffb84f5e PM |
55 | } |
56 | } | |
57 | else if (rcls == FP_ZERO && icls == FP_ZERO) | |
58 | { | |
59 | res = x; | |
60 | } | |
61 | else | |
62 | { | |
c50eee19 | 63 | res = M_SUF (__kernel_casinh) (x, 0); |
ffb84f5e PM |
64 | } |
65 | ||
66 | return res; | |
67 | } | |
c50eee19 PM |
68 | |
69 | declare_mgen_alias (__casinh, casinh) |