1 /* Complex sine hyperbole function for float.
2 Copyright (C) 1997 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 __csinhf (__complex__
float x
)
31 __complex__
float retval
;
32 int negate
= signbit (__real__ x
);
33 int rcls
= fpclassify (__real__ x
);
34 int icls
= fpclassify (__imag__ x
);
36 __real__ x
= fabsf (__real__ x
);
40 /* Real part is finite. */
43 /* Imaginary part is finite. */
44 float sinh_val
= __ieee754_sinhf (__real__ x
);
45 float cosh_val
= __ieee754_coshf (__real__ x
);
48 __sincosf (__imag__ x
, &sinix
, &cosix
);
50 __real__ retval
= sinh_val
* cosix
;
51 __imag__ retval
= cosh_val
* sinix
;
54 __real__ retval
= -__real__ retval
;
60 /* Real part is 0.0. */
61 __real__ retval
= __copysignf (0.0, negate
? -1.0 : 1.0);
62 __imag__ retval
= __nanf ("") + __nanf ("");
65 if (icls
== FP_INFINITE
)
66 feraiseexcept (FE_INVALID
);
71 __real__ retval
= __nanf ("");
72 __imag__ retval
= __nanf ("");
75 feraiseexcept (FE_INVALID
);
80 else if (rcls
== FP_INFINITE
)
82 /* Real part is infinite. */
85 /* Imaginary part is 0.0. */
86 __real__ retval
= negate
? -HUGE_VALF
: HUGE_VALF
;
87 __imag__ retval
= __imag__ x
;
89 else if (icls
> FP_ZERO
)
91 /* Imaginary part is finite. */
94 __sincosf (__imag__ x
, &sinix
, &cosix
);
96 __real__ retval
= __copysignf (HUGE_VALF
, cosix
);
97 __imag__ retval
= __copysignf (HUGE_VALF
, sinix
);
100 __real__ retval
= -__real__ retval
;
104 /* The addition raises the invalid exception. */
105 __real__ retval
= HUGE_VALF
;
106 __imag__ retval
= __nanf ("") + __nanf ("");
109 if (icls
== FP_INFINITE
)
110 feraiseexcept (FE_INVALID
);
116 __real__ retval
= __nanf ("");
117 __imag__ retval
= __imag__ x
== 0.0 ? __imag__ x
: __nanf ("");
123 weak_alias (__csinhf
, csinhf
)