2.5-18.1

1 files changed, 64 insertions, 0 deletions

diff --git a/math/s_casinf.c b/math/s_casinf.c
new file mode 100644
index 0000000000..5278dbbf78
--- /dev/null
+++ b/math/s_casinf.c
@@ -0,0 +1,64 @@
+/* Return arc sine of complex float 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>
+
+
+__complex__ float
+__casinf (__complex__ float x)
+{
+  __complex__ float res;
+
+  if (isnan (__real__ x) || isnan (__imag__ x))
+    {
+      if (__real__ x == 0.0)
+	{
+	  res = x;
+	}
+      else if (__isinff (__real__ x) || __isinff (__imag__ x))
+	{
+	  __real__ res = __nanf ("");
+	  __imag__ res = __copysignf (HUGE_VALF, __imag__ x);
+	}
+      else
+	{
+	  __real__ res = __nanf ("");
+	  __imag__ res = __nanf ("");
+	}
+    }
+  else
+    {
+      __complex__ float y;
+
+      __real__ y = -__imag__ x;
+      __imag__ y = __real__ x;
+
+      y = __casinhf (y);
+
+      __real__ res = __imag__ y;
+      __imag__ res = -__real__ y;
+    }
+
+  return res;
+}
+#ifndef __casinf
+weak_alias (__casinf, casinf)
+#endif