1 /* Complex cosine hyperbole function for double.
2 Copyright (C) 1997, 2011 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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.
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.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
25 #include <math_private.h>
29 __ccosh (__complex__
double x
)
31 __complex__
double retval
;
32 int rcls
= fpclassify (__real__ x
);
33 int icls
= fpclassify (__imag__ x
);
35 if (__builtin_expect (rcls
>= FP_ZERO
, 1))
37 /* Real part is finite. */
38 if (__builtin_expect (icls
>= FP_ZERO
, 1))
40 /* Imaginary part is finite. */
41 double sinh_val
= __ieee754_sinh (__real__ x
);
42 double cosh_val
= __ieee754_cosh (__real__ x
);
45 __sincos (__imag__ x
, &sinix
, &cosix
);
47 __real__ retval
= cosh_val
* cosix
;
48 __imag__ retval
= sinh_val
* sinix
;
52 __imag__ retval
= __real__ x
== 0.0 ? 0.0 : __nan ("");
53 __real__ retval
= __nan ("") + __nan ("");
55 if (icls
== FP_INFINITE
)
56 feraiseexcept (FE_INVALID
);
59 else if (rcls
== FP_INFINITE
)
61 /* Real part is infinite. */
62 if (__builtin_expect (icls
> FP_ZERO
, 1))
64 /* Imaginary part is finite. */
67 __sincos (__imag__ x
, &sinix
, &cosix
);
69 __real__ retval
= __copysign (HUGE_VAL
, cosix
);
70 __imag__ retval
= (__copysign (HUGE_VAL
, sinix
)
71 * __copysign (1.0, __real__ x
));
73 else if (icls
== FP_ZERO
)
75 /* Imaginary part is 0.0. */
76 __real__ retval
= HUGE_VAL
;
77 __imag__ retval
= __imag__ x
* __copysign (1.0, __real__ x
);
81 /* The addition raises the invalid exception. */
82 __real__ retval
= HUGE_VAL
;
83 __imag__ retval
= __nan ("") + __nan ("");
85 if (icls
== FP_INFINITE
)
86 feraiseexcept (FE_INVALID
);
91 __real__ retval
= __nan ("");
92 __imag__ retval
= __imag__ x
== 0.0 ? __imag__ x
: __nan ("");
97 weak_alias (__ccosh
, ccosh
)
99 strong_alias (__ccosh
, __ccoshl
)
100 weak_alias (__ccosh
, ccoshl
)