URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [tags/] [gnu-dev/] [fsf-gcc-snapshot-1-mar-12/] [or1k-gcc/] [libquadmath/] [math/] [cacoshq.c] - Rev 783
Compare with Previous | Blame | View Log
/* Return arc hyperbole cosine for __float128 value. Copyright (C) 1997, 1998, 2006 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include "quadmath-imp.h" __complex128 cacoshq (__complex128 x) { __complex128 res; int rcls = fpclassifyq (__real__ x); int icls = fpclassifyq (__imag__ x); if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE) { if (icls == QUADFP_INFINITE) { __real__ res = HUGE_VALQ; if (rcls == QUADFP_NAN) __imag__ res = nanq (""); else __imag__ res = copysignq ((rcls == QUADFP_INFINITE ? (__real__ x < 0.0 ? M_PIq - M_PI_4q : M_PI_4q) : M_PI_2q), __imag__ x); } else if (rcls == QUADFP_INFINITE) { __real__ res = HUGE_VALQ; if (icls >= QUADFP_ZERO) __imag__ res = copysignq (signbitq (__real__ x) ? M_PIq : 0.0, __imag__ x); else __imag__ res = nanq (""); } else { __real__ res = nanq (""); __imag__ res = nanq (""); } } else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO) { __real__ res = 0.0; __imag__ res = copysignq (M_PI_2q, __imag__ x); } else { __complex128 y; __real__ y = (__real__ x - __imag__ x) * (__real__ x + __imag__ x) - 1.0; __imag__ y = 2.0 * __real__ x * __imag__ x; y = csqrtq (y); if (__real__ x < 0.0) y = -y; __real__ y += __real__ x; __imag__ y += __imag__ x; res = clogq (y); /* We have to use the positive branch. */ if (__real__ res < 0.0) res = -res; } return res; }