1 /* Return arc sine of a complex float type.
2 Copyright (C) 1997-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
24 M_DECL_FUNC (__casin) (CFLOAT x)
28 if (isnan (__real__ x) || isnan (__imag__ x))
34 else if (isinf (__real__ x) || isinf (__imag__ x))
37 __imag__ res = M_COPYSIGN (M_HUGE_VAL, __imag__ x);
49 __real__ y = -__imag__ x;
50 __imag__ y = __real__ x;
52 y = M_SUF (__casinh) (y);
54 __real__ res = __imag__ y;
55 __imag__ res = -__real__ y;
61 declare_mgen_alias (__casin, casin)