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Diffstat (limited to 'math/s_catanhl.c')
| -rw-r--r-- | math/s_catanhl.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/math/s_catanhl.c b/math/s_catanhl.c deleted file mode 100644 index 4c8e8711ab..0000000000 --- a/math/s_catanhl.c +++ /dev/null @@ -1,141 +0,0 @@ -/* Return arc hyperbole tangent for long double 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> - -/* To avoid spurious overflows, use this definition to treat IBM long - double as approximating an IEEE-style format. */ -#if LDBL_MANT_DIG == 106 -# undef LDBL_EPSILON -# define LDBL_EPSILON 0x1p-106L -#endif - -__complex__ long double -__catanhl (__complex__ long double x) -{ - __complex__ long double res; - int rcls = fpclassify (__real__ x); - int icls = fpclassify (__imag__ x); - - if (__glibc_unlikely (rcls <= FP_INFINITE || icls <= FP_INFINITE)) - { - if (icls == FP_INFINITE) - { - __real__ res = __copysignl (0.0, __real__ x); - __imag__ res = __copysignl (M_PI_2l, __imag__ x); - } - else if (rcls == FP_INFINITE || rcls == FP_ZERO) - { - __real__ res = __copysignl (0.0, __real__ x); - if (icls >= FP_ZERO) - __imag__ res = __copysignl (M_PI_2l, __imag__ x); - else - __imag__ res = __nanl (""); - } - else - { - __real__ res = __nanl (""); - __imag__ res = __nanl (""); - } - } - else if (__glibc_unlikely (rcls == FP_ZERO && icls == FP_ZERO)) - { - res = x; - } - else - { - if (fabsl (__real__ x) >= 16.0L / LDBL_EPSILON - || fabsl (__imag__ x) >= 16.0L / LDBL_EPSILON) - { - __imag__ res = __copysignl (M_PI_2l, __imag__ x); - if (fabsl (__imag__ x) <= 1.0L) - __real__ res = 1.0L / __real__ x; - else if (fabsl (__real__ x) <= 1.0L) - __real__ res = __real__ x / __imag__ x / __imag__ x; - else - { - long double h = __ieee754_hypotl (__real__ x / 2.0L, - __imag__ x / 2.0L); - __real__ res = __real__ x / h / h / 4.0L; - } - } - else - { - if (fabsl (__real__ x) == 1.0L - && fabsl (__imag__ x) < LDBL_EPSILON * LDBL_EPSILON) - __real__ res = (__copysignl (0.5L, __real__ x) - * (M_LN2l - __ieee754_logl (fabsl (__imag__ x)))); - else - { - long double i2 = 0.0; - if (fabsl (__imag__ x) >= LDBL_EPSILON * LDBL_EPSILON) - i2 = __imag__ x * __imag__ x; - - long double num = 1.0L + __real__ x; - num = i2 + num * num; - - long double den = 1.0L - __real__ x; - den = i2 + den * den; - - long double f = num / den; - if (f < 0.5L) - __real__ res = 0.25L * __ieee754_logl (f); - else - { - num = 4.0L * __real__ x; - __real__ res = 0.25L * __log1pl (num / den); - } - } - - long double absx, absy, den; - - absx = fabsl (__real__ x); - absy = fabsl (__imag__ x); - if (absx < absy) - { - long double t = absx; - absx = absy; - absy = t; - } - - if (absy < LDBL_EPSILON / 2.0L) - { - den = (1.0L - absx) * (1.0L + absx); - if (den == -0.0L) - den = 0.0L; - } - else if (absx >= 1.0L) - den = (1.0L - absx) * (1.0L + absx) - absy * absy; - else if (absx >= 0.75L || absy >= 0.5L) - den = -__x2y2m1l (absx, absy); - else - den = (1.0L - absx) * (1.0L + absx) - absy * absy; - - __imag__ res = 0.5L * __ieee754_atan2l (2.0L * __imag__ x, den); - } - - math_check_force_underflow_complex (res); - } - - return res; -} -weak_alias (__catanhl, catanhl) |