1 files changed, 62 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_casinl.c b/sysdeps/libm-ieee754/s_casinl.c
new file mode 100644
index 0000000000..cc750d4a11
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_casinl.c
@@ -0,0 +1,62 @@
+/* Return arc sine of complex long 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  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
+__casinl (__complex__ long double x)
+{
+  __complex__ long double res;
+
+  if (isnan (__real__ x) || isnan (__imag__ x))
+    {
+      if (__real__ x == 0.0)
+	{
+	  res = x;
+	}
+      else if (__isinfl (__real__ x) || __isinfl (__imag__ x))
+	{
+	  __real__ res = __nanl ("");
+	  __imag__ res = __copysignl (HUGE_VALL, __imag__ x);
+	}
+      else
+	{
+	  __real__ res = __nanl ("");
+	  __imag__ res = __nanl ("");
+	}
+    }
+  else
+    {
+      __complex__ long double y;
+
+      __real__ y = -__imag__ x;
+      __imag__ y = __real__ x;
+
+      y = __casinhl (y);
+
+      __real__ res = __imag__ y;
+      __imag__ res = -__real__ y;
+    }
+
+  return res;
+}
+weak_alias (__casinl, casinl)