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Diffstat (limited to 'math/s_catanf.c')
| -rw-r--r-- | math/s_catanf.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/math/s_catanf.c b/math/s_catanf.c deleted file mode 100644 index 63e6b6e..0000000 --- a/math/s_catanf.c +++ /dev/null @@ -1,143 +0,0 @@ -/* Return arc tangent of complex float value. - Copyright (C) 1997-2016 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 <complex.h> -#include <math.h> -#include <math_private.h> -#include <float.h> - -__complex__ float -__catanf (__complex__ float x) -{ - __complex__ float res; - int rcls = fpclassify (__real__ x); - int icls = fpclassify (__imag__ x); - - if (__glibc_unlikely (rcls <= FP_INFINITE || icls <= FP_INFINITE)) - { - if (rcls == FP_INFINITE) - { - __real__ res = __copysignf (M_PI_2, __real__ x); - __imag__ res = __copysignf (0.0, __imag__ x); - } - else if (icls == FP_INFINITE) - { - if (rcls >= FP_ZERO) - __real__ res = __copysignf (M_PI_2, __real__ x); - else - __real__ res = __nanf (""); - __imag__ res = __copysignf (0.0, __imag__ x); - } - else if (icls == FP_ZERO || icls == FP_INFINITE) - { - __real__ res = __nanf (""); - __imag__ res = __copysignf (0.0, __imag__ x); - } - else - { - __real__ res = __nanf (""); - __imag__ res = __nanf (""); - } - } - else if (__glibc_unlikely (rcls == FP_ZERO && icls == FP_ZERO)) - { - res = x; - } - else - { - if (fabsf (__real__ x) >= 16.0f / FLT_EPSILON - || fabsf (__imag__ x) >= 16.0f / FLT_EPSILON) - { - __real__ res = __copysignf ((float) M_PI_2, __real__ x); - if (fabsf (__real__ x) <= 1.0f) - __imag__ res = 1.0f / __imag__ x; - else if (fabsf (__imag__ x) <= 1.0f) - __imag__ res = __imag__ x / __real__ x / __real__ x; - else - { - float h = __ieee754_hypotf (__real__ x / 2.0f, - __imag__ x / 2.0f); - __imag__ res = __imag__ x / h / h / 4.0f; - } - } - else - { - float den, absx, absy; - - absx = fabsf (__real__ x); - absy = fabsf (__imag__ x); - if (absx < absy) - { - float t = absx; - absx = absy; - absy = t; - } - - if (absy < FLT_EPSILON / 2.0f) - { - den = (1.0f - absx) * (1.0f + absx); - if (den == -0.0f) - den = 0.0f; - } - else if (absx >= 1.0f) - den = (1.0f - absx) * (1.0f + absx) - absy * absy; - else if (absx >= 0.75f || absy >= 0.5f) - den = -__x2y2m1f (absx, absy); - else - den = (1.0f - absx) * (1.0f + absx) - absy * absy; - - __real__ res = 0.5f * __ieee754_atan2f (2.0f * __real__ x, den); - - if (fabsf (__imag__ x) == 1.0f - && fabsf (__real__ x) < FLT_EPSILON * FLT_EPSILON) - __imag__ res = (__copysignf (0.5f, __imag__ x) - * ((float) M_LN2 - - __ieee754_logf (fabsf (__real__ x)))); - else - { - float r2 = 0.0f, num, f; - - if (fabsf (__real__ x) >= FLT_EPSILON * FLT_EPSILON) - r2 = __real__ x * __real__ x; - - num = __imag__ x + 1.0f; - num = r2 + num * num; - - den = __imag__ x - 1.0f; - den = r2 + den * den; - - f = num / den; - if (f < 0.5f) - __imag__ res = 0.25f * __ieee754_logf (f); - else - { - num = 4.0f * __imag__ x; - __imag__ res = 0.25f * __log1pf (num / den); - } - } - } - - math_check_force_underflow_complex (res); - } - - return res; -} -#ifndef __catanf -weak_alias (__catanf, catanf) -#endif |