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993b3242 UD |
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 | |
41bdb6e2 AJ |
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. | |
993b3242 UD |
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 | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
993b3242 | 15 | |
41bdb6e2 AJ |
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. */ | |
993b3242 UD |
20 | |
21 | #include <complex.h> | |
40a55d20 | 22 | #include <fenv.h> |
993b3242 UD |
23 | #include <math.h> |
24 | ||
63551311 UD |
25 | #include "math_private.h" |
26 | ||
993b3242 UD |
27 | |
28 | __complex__ long double | |
29 | __csinhl (__complex__ long double x) | |
30 | { | |
31 | __complex__ long double retval; | |
32 | int negate = signbit (__real__ x); | |
63551311 UD |
33 | int rcls = fpclassify (__real__ x); |
34 | int icls = fpclassify (__imag__ x); | |
993b3242 | 35 | |
63551311 | 36 | __real__ x = fabsl (__real__ x); |
993b3242 | 37 | |
63551311 | 38 | if (rcls >= FP_ZERO) |
993b3242 | 39 | { |
63551311 UD |
40 | /* Real part is finite. */ |
41 | if (icls >= FP_ZERO) | |
993b3242 | 42 | { |
63551311 UD |
43 | /* Imaginary part is finite. */ |
44 | long double sinh_val = __ieee754_sinhl (__real__ x); | |
779ae82e | 45 | long double cosh_val = __ieee754_coshl (__real__ x); |
7799b7b3 | 46 | long double sinix, cosix; |
993b3242 | 47 | |
7799b7b3 UD |
48 | __sincosl (__imag__ x, &sinix, &cosix); |
49 | ||
50 | __real__ retval = sinh_val * cosix; | |
779ae82e | 51 | __imag__ retval = cosh_val * sinix; |
993b3242 UD |
52 | |
53 | if (negate) | |
54 | __real__ retval = -__real__ retval; | |
55 | } | |
56 | else | |
57 | { | |
63551311 | 58 | if (rcls == FP_ZERO) |
993b3242 | 59 | { |
63551311 | 60 | /* Real part is 0.0. */ |
993b3242 UD |
61 | __real__ retval = __copysignl (0.0, negate ? -1.0 : 1.0); |
62 | __imag__ retval = __nanl ("") + __nanl (""); | |
779ae82e UD |
63 | |
64 | #ifdef FE_INVALID | |
65 | if (icls == FP_INFINITE) | |
66 | feraiseexcept (FE_INVALID); | |
67 | #endif | |
993b3242 UD |
68 | } |
69 | else | |
70 | { | |
71 | __real__ retval = __nanl (""); | |
72 | __imag__ retval = __nanl (""); | |
779ae82e UD |
73 | |
74 | #ifdef FE_INVALID | |
75 | feraiseexcept (FE_INVALID); | |
76 | #endif | |
993b3242 UD |
77 | } |
78 | } | |
79 | } | |
63551311 | 80 | else if (rcls == FP_INFINITE) |
993b3242 | 81 | { |
63551311 UD |
82 | /* Real part is infinite. */ |
83 | if (icls == FP_ZERO) | |
993b3242 | 84 | { |
63551311 | 85 | /* Imaginary part is 0.0. */ |
993b3242 UD |
86 | __real__ retval = negate ? -HUGE_VALL : HUGE_VALL; |
87 | __imag__ retval = __imag__ x; | |
88 | } | |
63551311 | 89 | else if (icls > FP_ZERO) |
993b3242 | 90 | { |
63551311 | 91 | /* Imaginary part is finite. */ |
7799b7b3 UD |
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); | |
993b3242 UD |
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 (""); | |
779ae82e UD |
107 | |
108 | #ifdef FE_INVALID | |
109 | if (icls == FP_INFINITE) | |
110 | feraiseexcept (FE_INVALID); | |
111 | #endif | |
993b3242 UD |
112 | } |
113 | } | |
114 | else | |
115 | { | |
63551311 UD |
116 | __real__ retval = __nanl (""); |
117 | __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nanl (""); | |
993b3242 UD |
118 | } |
119 | ||
120 | return retval; | |
121 | } | |
122 | weak_alias (__csinhl, csinhl) |