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-rw-r--r--math/s_catanh.c84
1 files changed, 0 insertions, 84 deletions
diff --git a/math/s_catanh.c b/math/s_catanh.c
deleted file mode 100644
index e15c073f96..0000000000
--- a/math/s_catanh.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/* Return arc hyperbole tangent for double value.
- Copyright (C) 1997 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__ double
-__catanh (__complex__ double x)
-{
- __complex__ double res;
- int rcls = fpclassify (__real__ x);
- int icls = fpclassify (__imag__ x);
-
- if (rcls <= FP_INFINITE || icls <= FP_INFINITE)
- {
- if (icls == FP_INFINITE)
- {
- __real__ res = __copysign (0.0, __real__ x);
- __imag__ res = __copysign (M_PI_2, __imag__ x);
- }
- else if (rcls == FP_INFINITE || rcls == FP_ZERO)
- {
- __real__ res = __copysign (0.0, __real__ x);
- if (icls >= FP_ZERO)
- __imag__ res = __copysign (M_PI_2, __imag__ x);
- else
- __imag__ res = __nan ("");
- }
- else
- {
- __real__ res = __nan ("");
- __imag__ res = __nan ("");
- }
- }
- else if (rcls == FP_ZERO && icls == FP_ZERO)
- {
- res = x;
- }
- else
- {
- double i2, num, den;
-
- i2 = __imag__ x * __imag__ x;
-
- num = 1.0 + __real__ x;
- num = i2 + num * num;
-
- den = 1.0 - __real__ x;
- den = i2 + den * den;
-
- __real__ res = 0.25 * (__ieee754_log (num) - __ieee754_log (den));
-
- den = 1 - __real__ x * __real__ x - i2;
-
- __imag__ res = 0.5 * __ieee754_atan2 (2.0 * __imag__ x, den);
- }
-
- return res;
-}
-weak_alias (__catanh, catanh)
-#ifdef NO_LONG_DOUBLE
-strong_alias (__catanh, __catanhl)
-weak_alias (__catanh, catanhl)
-#endif