1 files changed, 63 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_cexp.c b/sysdeps/libm-ieee754/s_cexp.c
new file mode 100644
index 0000000000..46f9f612eb
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_cexp.c
@@ -0,0 +1,63 @@
+/* Return value of complex exponential function for double complex 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__ double
+__cexp (__complex__ double x)
+{
+  __complex__ double retval;
+
+  if (isfinite (__real__ x))
+    {
+      if (isfinite (__imag__ x))
+	{
+	  retval = __exp (__real__ x) * (__cos (__imag__ x)
+					 + 1i * __sin (__imag__ x));
+	}
+      else
+	/* If the imaginary part is +-inf or NaN and the real part is
+	   not +-inf the result is NaN + iNan.  */
+	retval = __nan ("") + 1.0i * __nan ("");
+    }
+  else if (__isinf (__real__ x))
+    {
+      if (isfinite (__imag x))
+	{
+	  if (signbit (__real__ x) == 0 && __imag__ x == 0.0)
+	    retval = HUGE_VAL;
+	  else
+	    retval = ((signbit (__real__ x) ? 0.0 : HUGE_VAL)
+		      * (__cos (__imag__ x) + 1i * __sin (__imag__ x)));
+	}
+      else if (signbit (__real__ x))
+	retval = HUGE_VAL + 1.0i * __nan ("");
+      else
+	retval = 0.0;
+    }
+  else
+    /* If the real part is NaN the result is NaN + iNan.  */
+    retval = __nan ("") + 1.0i * __nan ("");
+
+  return retval;
+}
+weak_alias (__cexp, cexp)