| /* Complex sine hyperbole function for float types. |
| Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "quadmath-imp.h" |
| |
| __complex128 |
| csinhq (__complex128 x) |
| { |
| __complex128 retval; |
| int negate = signbitq (__real__ x); |
| int rcls = fpclassifyq (__real__ x); |
| int icls = fpclassifyq (__imag__ x); |
| |
| __real__ x = fabsq (__real__ x); |
| |
| if (__glibc_likely (rcls >= QUADFP_ZERO)) |
| { |
| /* Real part is finite. */ |
| if (__glibc_likely (icls >= QUADFP_ZERO)) |
| { |
| /* Imaginary part is finite. */ |
| const int t = (int) ((FLT128_MAX_EXP - 1) * M_LN2q); |
| __float128 sinix, cosix; |
| |
| if (__glibc_likely (fabsq (__imag__ x) > FLT128_MIN)) |
| { |
| sincosq (__imag__ x, &sinix, &cosix); |
| } |
| else |
| { |
| sinix = __imag__ x; |
| cosix = 1; |
| } |
| |
| if (negate) |
| cosix = -cosix; |
| |
| if (fabsq (__real__ x) > t) |
| { |
| __float128 exp_t = expq (t); |
| __float128 rx = fabsq (__real__ x); |
| if (signbitq (__real__ x)) |
| cosix = -cosix; |
| rx -= t; |
| sinix *= exp_t / 2; |
| cosix *= exp_t / 2; |
| if (rx > t) |
| { |
| rx -= t; |
| sinix *= exp_t; |
| cosix *= exp_t; |
| } |
| if (rx > t) |
| { |
| /* Overflow (original real part of x > 3t). */ |
| __real__ retval = FLT128_MAX * cosix; |
| __imag__ retval = FLT128_MAX * sinix; |
| } |
| else |
| { |
| __float128 exp_val = expq (rx); |
| __real__ retval = exp_val * cosix; |
| __imag__ retval = exp_val * sinix; |
| } |
| } |
| else |
| { |
| __real__ retval = sinhq (__real__ x) * cosix; |
| __imag__ retval = coshq (__real__ x) * sinix; |
| } |
| |
| math_check_force_underflow_complex (retval); |
| } |
| else |
| { |
| if (rcls == QUADFP_ZERO) |
| { |
| /* Real part is 0.0. */ |
| __real__ retval = copysignq (0, negate ? -1 : 1); |
| __imag__ retval = __imag__ x - __imag__ x; |
| } |
| else |
| { |
| __real__ retval = nanq (""); |
| __imag__ retval = nanq (""); |
| |
| feraiseexcept (FE_INVALID); |
| } |
| } |
| } |
| else if (rcls == QUADFP_INFINITE) |
| { |
| /* Real part is infinite. */ |
| if (__glibc_likely (icls > QUADFP_ZERO)) |
| { |
| /* Imaginary part is finite. */ |
| __float128 sinix, cosix; |
| |
| if (__glibc_likely (fabsq (__imag__ x) > FLT128_MIN)) |
| { |
| sincosq (__imag__ x, &sinix, &cosix); |
| } |
| else |
| { |
| sinix = __imag__ x; |
| cosix = 1; |
| } |
| |
| __real__ retval = copysignq (HUGE_VALQ, cosix); |
| __imag__ retval = copysignq (HUGE_VALQ, sinix); |
| |
| if (negate) |
| __real__ retval = -__real__ retval; |
| } |
| else if (icls == QUADFP_ZERO) |
| { |
| /* Imaginary part is 0.0. */ |
| __real__ retval = negate ? -HUGE_VALQ : HUGE_VALQ; |
| __imag__ retval = __imag__ x; |
| } |
| else |
| { |
| __real__ retval = HUGE_VALQ; |
| __imag__ retval = __imag__ x - __imag__ x; |
| } |
| } |
| else |
| { |
| __real__ retval = nanq (""); |
| __imag__ retval = __imag__ x == 0 ? __imag__ x : nanq (""); |
| } |
| |
| return retval; |
| } |