From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libquadmath/math/catanq.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 libquadmath/math/catanq.c (limited to 'libquadmath/math/catanq.c') diff --git a/libquadmath/math/catanq.c b/libquadmath/math/catanq.c new file mode 100644 index 000000000..a9c925797 --- /dev/null +++ b/libquadmath/math/catanq.c @@ -0,0 +1,81 @@ +/* Return arc tangent of complex __float128 value. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 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 +catanq (__complex128 x) +{ + __complex128 res; + int rcls = fpclassifyq (__real__ x); + int icls = fpclassifyq (__imag__ x); + + if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE) + { + if (rcls == QUADFP_INFINITE) + { + __real__ res = copysignq (M_PI_2q, __real__ x); + __imag__ res = copysignq (0.0, __imag__ x); + } + else if (icls == QUADFP_INFINITE) + { + if (rcls >= QUADFP_ZERO) + __real__ res = copysignq (M_PI_2q, __real__ x); + else + __real__ res = nanq (""); + __imag__ res = copysignq (0.0, __imag__ x); + } + else if (icls == QUADFP_ZERO || icls == QUADFP_INFINITE) + { + __real__ res = nanq (""); + __imag__ res = copysignq (0.0, __imag__ x); + } + else + { + __real__ res = nanq (""); + __imag__ res = nanq (""); + } + } + else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO) + { + res = x; + } + else + { + __float128 r2, num, den; + + r2 = __real__ x * __real__ x; + + den = 1 - r2 - __imag__ x * __imag__ x; + + __real__ res = 0.5 * atan2q (2.0 * __real__ x, den); + + num = __imag__ x + 1.0; + num = r2 + num * num; + + den = __imag__ x - 1.0; + den = r2 + den * den; + + __imag__ res = 0.25 * logq (num / den); + } + + return res; +} -- cgit v1.2.3