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-rw-r--r--sysdeps/ieee754/dbl-64/e_atanh.c74
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diff --git a/sysdeps/ieee754/dbl-64/e_atanh.c b/sysdeps/ieee754/dbl-64/e_atanh.c
deleted file mode 100644
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--- a/sysdeps/ieee754/dbl-64/e_atanh.c
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@@ -1,74 +0,0 @@
-/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
-
- 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/>. */
-
-
-/* __ieee754_atanh(x)
- Method :
- 1.Reduced x to positive by atanh(-x) = -atanh(x)
- 2.For x>=0.5
- 1 2x x
- atanh(x) = --- * log(1 + -------) = 0.5 * log1p(2 * --------)
- 2 1 - x 1 - x
-
- For x<0.5
- atanh(x) = 0.5*log1p(2x+2x*x/(1-x))
-
- Special cases:
- atanh(x) is NaN if |x| > 1 with signal;
- atanh(NaN) is that NaN with no signal;
- atanh(+-1) is +-INF with signal.
-
- */
-
-#include <float.h>
-#include <inttypes.h>
-#include <math.h>
-#include <math_private.h>
-
-static const double huge = 1e300;
-
-double
-__ieee754_atanh (double x)
-{
- double xa = fabs (x);
- double t;
- if (isless (xa, 0.5))
- {
- if (__glibc_unlikely (xa < 0x1.0p-28))
- {
- math_force_eval (huge + x);
- math_check_force_underflow (x);
- return x;
- }
-
- t = xa + xa;
- t = 0.5 * __log1p (t + t * xa / (1.0 - xa));
- }
- else if (__glibc_likely (isless (xa, 1.0)))
- t = 0.5 * __log1p ((xa + xa) / (1.0 - xa));
- else
- {
- if (isgreater (xa, 1.0))
- return (x - x) / (x - x);
-
- return x / 0.0;
- }
-
- return __copysign (t, x);
-}
-strong_alias (__ieee754_atanh, __atanh_finite)