## Mercurial > hg > CbC > CbC_gcc

### view libquadmath/math/cacosq.c @ 158:494b0b89df80 default tip

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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |

parents | 1830386684a0 |

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/* Return cosine of a complex type. 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 cacosq (__complex128 x) { __complex128 y; __complex128 res; int rcls = fpclassifyq (__real__ x); int icls = fpclassifyq (__imag__ x); if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE || (rcls == QUADFP_ZERO && icls == QUADFP_ZERO)) { y = casinq (x); __real__ res = (__float128) M_PI_2q - __real__ y; if (__real__ res == 0) __real__ res = 0; __imag__ res = -__imag__ y; } else { __real__ y = -__imag__ x; __imag__ y = __real__ x; y = __quadmath_kernel_casinhq (y, 1); __real__ res = __imag__ y; __imag__ res = __real__ y; } return res; }