diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/e_coshl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/e_coshl.c | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/sysdeps/ieee754/ldbl-128/e_coshl.c b/sysdeps/ieee754/ldbl-128/e_coshl.c deleted file mode 100644 index 70a2fe3e84..0000000000 --- a/sysdeps/ieee754/ldbl-128/e_coshl.c +++ /dev/null @@ -1,110 +0,0 @@ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -/* Changes for 128-bit long double are - Copyright (C) 2001 Stephen L. Moshier <moshier@na-net.ornl.gov> - and are incorporated herein by permission of the author. The author - reserves the right to distribute this material elsewhere under different - copying permissions. These modifications are distributed here under - the following terms: - - This 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. - - This 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 this library; if not, see - <http://www.gnu.org/licenses/>. */ - -/* __ieee754_coshl(x) - * Method : - * mathematically coshl(x) if defined to be (exp(x)+exp(-x))/2 - * 1. Replace x by |x| (coshl(x) = coshl(-x)). - * 2. - * [ exp(x) - 1 ]^2 - * 0 <= x <= ln2/2 : coshl(x) := 1 + ------------------- - * 2*exp(x) - * - * exp(x) + 1/exp(x) - * ln2/2 <= x <= 22 : coshl(x) := ------------------- - * 2 - * 22 <= x <= lnovft : coshl(x) := expl(x)/2 - * lnovft <= x <= ln2ovft: coshl(x) := expl(x/2)/2 * expl(x/2) - * ln2ovft < x : coshl(x) := huge*huge (overflow) - * - * Special cases: - * coshl(x) is |x| if x is +INF, -INF, or NaN. - * only coshl(0)=1 is exact for finite x. - */ - -#include <math.h> -#include <math_private.h> - -static const _Float128 one = 1.0, half = 0.5, huge = L(1.0e4900), -ovf_thresh = L(1.1357216553474703894801348310092223067821E4); - -_Float128 -__ieee754_coshl (_Float128 x) -{ - _Float128 t, w; - int32_t ex; - ieee854_long_double_shape_type u; - - u.value = x; - ex = u.parts32.w0 & 0x7fffffff; - - /* Absolute value of x. */ - u.parts32.w0 = ex; - - /* x is INF or NaN */ - if (ex >= 0x7fff0000) - return x * x; - - /* |x| in [0,0.5*ln2], return 1+expm1l(|x|)^2/(2*expl(|x|)) */ - if (ex < 0x3ffd62e4) /* 0.3465728759765625 */ - { - if (ex < 0x3fb80000) /* |x| < 2^-116 */ - return one; /* cosh(tiny) = 1 */ - t = __expm1l (u.value); - w = one + t; - - return one + (t * t) / (w + w); - } - - /* |x| in [0.5*ln2,40], return (exp(|x|)+1/exp(|x|)/2; */ - if (ex < 0x40044000) - { - t = __ieee754_expl (u.value); - return half * t + half / t; - } - - /* |x| in [22, ln(maxdouble)] return half*exp(|x|) */ - if (ex <= 0x400c62e3) /* 11356.375 */ - return half * __ieee754_expl (u.value); - - /* |x| in [log(maxdouble), overflowthresold] */ - if (u.value <= ovf_thresh) - { - w = __ieee754_expl (half * u.value); - t = half * w; - return t * w; - } - - /* |x| > overflowthresold, cosh(x) overflow */ - return huge * huge; -} -strong_alias (__ieee754_coshl, __coshl_finite) |