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Diffstat (limited to 'math/s_cacoshf.c')
| -rw-r--r-- | math/s_cacoshf.c | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/math/s_cacoshf.c b/math/s_cacoshf.c deleted file mode 100644 index a062ffc..0000000 --- a/math/s_cacoshf.c +++ /dev/null @@ -1,108 +0,0 @@ -/* Return arc hyperbole cosine for float value. - Copyright (C) 1997, 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 <complex.h> -#include <math.h> - -#include "math_private.h" - -__complex__ float -__cacoshf (__complex__ float x) -{ - __complex__ float res; - int rcls = fpclassify (__real__ x); - int icls = fpclassify (__imag__ x); - - if (rcls <= FP_INFINITE || icls <= FP_INFINITE) - { - if (icls == FP_INFINITE) - { - __real__ res = HUGE_VALF; - - if (rcls == FP_NAN) - __imag__ res = __nanf (""); - else - __imag__ res = __copysignf ((rcls == FP_INFINITE - ? (__real__ x < 0.0 - ? M_PI - M_PI_4 : M_PI_4) - : M_PI_2), __imag__ x); - } - else if (rcls == FP_INFINITE) - { - __real__ res = HUGE_VALF; - - if (icls >= FP_ZERO) - __imag__ res = __copysignf (signbit (__real__ x) ? M_PI : 0.0, - __imag__ x); - else - __imag__ res = __nanf (""); - } - else - { - __real__ res = __nanf (""); - __imag__ res = __nanf (""); - } - } - else if (rcls == FP_ZERO && icls == FP_ZERO) - { - __real__ res = 0.0; - __imag__ res = __copysignf (M_PI_2, __imag__ x); - } - else - { -#if 1 - __complex__ float y; - - __real__ y = (__real__ x - __imag__ x) * (__real__ x + __imag__ x) - 1.0; - __imag__ y = 2.0 * __real__ x * __imag__ x; - - y = __csqrtf (y); - - if (__real__ x < 0.0) - y = -y; - - __real__ y += __real__ x; - __imag__ y += __imag__ x; - - res = __clogf (y); -#else - float re2 = __real__ x * __real__ x; - float im2 = __imag__ x * __imag__ x; - float sq = re2 - im2 - 1.0; - float ro = __ieee754_sqrtf (sq * sq + 4 * re2 * im2); - float a = __ieee754_sqrtf ((sq + ro) / 2.0); - float b = __ieee754_sqrtf ((-sq + ro) / 2.0); - - __real__ res = 0.5 * __ieee754_logf (re2 + __real__ x * 2 * a - + im2 + __imag__ x * 2 * b - + ro); - __imag__ res = __ieee754_atan2f (__imag__ x + b, __real__ x + a); -#endif - - /* We have to use the positive branch. */ - if (__real__ res < 0.0) - res = -res; - } - - return res; -} -#ifndef __cacoshf -weak_alias (__cacoshf, cacoshf) -#endif |