1 /* Complex sine hyperbole function for long double.
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.
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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
20
21 #include <complex.h>
22 #include <fenv.h>
23 #include <math.h>
24
25 #include "math_private.h"
26
27
28 __complex__ long double
__csinhl(__complex__ long double x)29 __csinhl (__complex__ long double x)
30 {
31 __complex__ long double retval;
32 int negate = signbit (__real__ x);
33 int rcls = fpclassify (__real__ x);
34 int icls = fpclassify (__imag__ x);
35
36 __real__ x = fabsl (__real__ x);
37
38 if (rcls >= FP_ZERO)
39 {
40 /* Real part is finite. */
41 if (icls >= FP_ZERO)
42 {
43 /* Imaginary part is finite. */
44 long double sinh_val = __ieee754_sinhl (__real__ x);
45 long double cosh_val = __ieee754_coshl (__real__ x);
46 long double sinix, cosix;
47
48 __sincosl (__imag__ x, &sinix, &cosix);
49
50 __real__ retval = sinh_val * cosix;
51 __imag__ retval = cosh_val * sinix;
52
53 if (negate)
54 __real__ retval = -__real__ retval;
55 }
56 else
57 {
58 if (rcls == FP_ZERO)
59 {
60 /* Real part is 0.0. */
61 __real__ retval = __copysignl (0.0, negate ? -1.0 : 1.0);
62 __imag__ retval = __nanl ("") + __nanl ("");
63
64 #ifdef FE_INVALID
65 if (icls == FP_INFINITE)
66 feraiseexcept (FE_INVALID);
67 #endif
68 }
69 else
70 {
71 __real__ retval = __nanl ("");
72 __imag__ retval = __nanl ("");
73
74 #ifdef FE_INVALID
75 feraiseexcept (FE_INVALID);
76 #endif
77 }
78 }
79 }
80 else if (rcls == FP_INFINITE)
81 {
82 /* Real part is infinite. */
83 if (icls == FP_ZERO)
84 {
85 /* Imaginary part is 0.0. */
86 __real__ retval = negate ? -HUGE_VALL : HUGE_VALL;
87 __imag__ retval = __imag__ x;
88 }
89 else if (icls > FP_ZERO)
90 {
91 /* Imaginary part is finite. */
92 long double sinix, cosix;
93
94 __sincosl (__imag__ x, &sinix, &cosix);
95
96 __real__ retval = __copysignl (HUGE_VALL, cosix);
97 __imag__ retval = __copysignl (HUGE_VALL, sinix);
98
99 if (negate)
100 __real__ retval = -__real__ retval;
101 }
102 else
103 {
104 /* The addition raises the invalid exception. */
105 __real__ retval = HUGE_VALL;
106 __imag__ retval = __nanl ("") + __nanl ("");
107
108 #ifdef FE_INVALID
109 if (icls == FP_INFINITE)
110 feraiseexcept (FE_INVALID);
111 #endif
112 }
113 }
114 else
115 {
116 __real__ retval = __nanl ("");
117 __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nanl ("");
118 }
119
120 return retval;
121 }
122 weak_alias (__csinhl, csinhl)
123