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authorUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
committerUlrich Drepper <drepper@redhat.com>2005-12-14 15:06:39 +0000
commit9d13fb2413921c713f83efe331e8e4d219c62c6b (patch)
tree2d44d7ac45ab2d147eb8361bbff880c365aa8ad5 /math/s_casinhl.c
parentb6ab06cef4670e02756bcdd4d2c33a49369a4346 (diff)
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Moved to csu/errno-loc.c.
Diffstat (limited to 'math/s_casinhl.c')
-rw-r--r--math/s_casinhl.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/math/s_casinhl.c b/math/s_casinhl.c
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+++ b/math/s_casinhl.c
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+/* Return arc hyperbole sine for long double value.
+ Copyright (C) 1997, 1998 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>
+
+
+__complex__ long double
+__casinhl (__complex__ long double x)
+{
+ __complex__ long 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 = __copysignl (HUGE_VALL, __real__ x);
+
+ if (rcls == FP_NAN)
+ __imag__ res = __nanl ("");
+ else
+ __imag__ res = __copysignl (rcls >= FP_ZERO ? M_PI_2l : M_PI_4l,
+ __imag__ x);
+ }
+ else if (rcls <= FP_INFINITE)
+ {
+ __real__ res = __real__ x;
+ if ((rcls == FP_INFINITE && icls >= FP_ZERO)
+ || (rcls == FP_NAN && icls == FP_ZERO))
+ __imag__ res = __copysignl (0.0, __imag__ x);
+ else
+ __imag__ res = __nanl ("");
+ }
+ else
+ {
+ __real__ res = __nanl ("");
+ __imag__ res = __nanl ("");
+ }
+ }
+ else if (rcls == FP_ZERO && icls == FP_ZERO)
+ {
+ res = x;
+ }
+ else
+ {
+ __complex__ long double y;
+
+ __real__ y = (__real__ x - __imag__ x) * (__real__ x + __imag__ x) + 1.0;
+ __imag__ y = 2.0 * __real__ x * __imag__ x;
+
+ y = __csqrtl (y);
+
+ __real__ y += __real__ x;
+ __imag__ y += __imag__ x;
+
+ res = __clogl (y);
+ }
+
+ return res;
+}
+weak_alias (__casinhl, casinhl)