1 /* Complex sine hyperbole function for complex __float128.
2 Copyright (C) 1997-2012 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, see
18 <http://www.gnu.org/licenses/>. */
20 #include "quadmath-imp.h"
28 csinhq (__complex128 x)
31 int negate = signbitq (__real__ x);
32 int rcls = fpclassifyq (__real__ x);
33 int icls = fpclassifyq (__imag__ x);
35 __real__ x = fabsq (__real__ x);
37 if (__builtin_expect (rcls >= QUADFP_ZERO, 1))
39 /* Real part is finite. */
40 if (__builtin_expect (icls >= QUADFP_ZERO, 1))
42 /* Imaginary part is finite. */
43 const int t = (int) ((FLT128_MAX_EXP - 1) * M_LN2q);
44 __float128 sinix, cosix;
46 if (__builtin_expect (icls != QUADFP_SUBNORMAL, 1))
48 sincosq (__imag__ x, &sinix, &cosix);
56 if (fabsq (__real__ x) > t)
58 __float128 exp_t = expq (t);
59 __float128 rx = fabsq (__real__ x);
60 if (signbitq (__real__ x))
63 sinix *= exp_t / 2.0Q;
64 cosix *= exp_t / 2.0Q;
73 /* Overflow (original real part of x > 3t). */
74 __real__ retval = FLT128_MAX * cosix;
75 __imag__ retval = FLT128_MAX * sinix;
79 __float128 exp_val = expq (rx);
80 __real__ retval = exp_val * cosix;
81 __imag__ retval = exp_val * sinix;
86 __real__ retval = sinhq (__real__ x) * cosix;
87 __imag__ retval = coshq (__real__ x) * sinix;
91 __real__ retval = -__real__ retval;
95 if (rcls == QUADFP_ZERO)
97 /* Real part is 0.0. */
98 __real__ retval = copysignq (0.0Q, negate ? -1.0Q : 1.0Q);
99 __imag__ retval = nanq ("") + nanq ("");
102 if (icls == QUADFP_INFINITE)
103 feraiseexcept (FE_INVALID);
108 __real__ retval = nanq ("");
109 __imag__ retval = nanq ("");
112 feraiseexcept (FE_INVALID);
117 else if (rcls == QUADFP_INFINITE)
119 /* Real part is infinite. */
120 if (__builtin_expect (icls > QUADFP_ZERO, 1))
122 /* Imaginary part is finite. */
123 __float128 sinix, cosix;
125 if (__builtin_expect (icls != QUADFP_SUBNORMAL, 1))
127 sincosq (__imag__ x, &sinix, &cosix);
135 __real__ retval = copysignq (HUGE_VALQ, cosix);
136 __imag__ retval = copysignq (HUGE_VALQ, sinix);
139 __real__ retval = -__real__ retval;
141 else if (icls == QUADFP_ZERO)
143 /* Imaginary part is 0.0. */
144 __real__ retval = negate ? -HUGE_VALQ : HUGE_VALQ;
145 __imag__ retval = __imag__ x;
149 /* The addition raises the invalid exception. */
150 __real__ retval = HUGE_VALQ;
151 __imag__ retval = nanq ("") + nanq ("");
154 if (icls == QUADFP_INFINITE)
155 feraiseexcept (FE_INVALID);
161 __real__ retval = nanq ("");
162 __imag__ retval = __imag__ x == 0.0Q ? __imag__ x : nanq ("");