2.5-18.1

1 files changed, 105 insertions, 0 deletions

diff --git a/math/s_ccosh.c b/math/s_ccosh.c
new file mode 100644
index 0000000000..f5b29db24b
--- /dev/null
+++ b/math/s_ccosh.c
@@ -0,0 +1,105 @@
+/* Complex cosine hyperbole function for double.
+   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 <fenv.h>
+#include <math.h>
+
+#include "math_private.h"
+
+
+__complex__ double
+__ccosh (__complex__ double x)
+{
+  __complex__ double retval;
+  int rcls = fpclassify (__real__ x);
+  int icls = fpclassify (__imag__ x);
+
+  if (rcls >= FP_ZERO)
+    {
+      /* Real part is finite.  */
+      if (icls >= FP_ZERO)
+	{
+	  /* Imaginary part is finite.  */
+	  double sinh_val = __ieee754_sinh (__real__ x);
+	  double cosh_val = __ieee754_cosh (__real__ x);
+	  double sinix, cosix;
+
+	  __sincos (__imag__ x, &sinix, &cosix);
+
+	  __real__ retval = cosh_val * cosix;
+	  __imag__ retval = sinh_val * sinix;
+	}
+      else
+	{
+	  __imag__ retval = __real__ x == 0.0 ? 0.0 : __nan ("");
+	  __real__ retval = __nan ("") + __nan ("");
+
+#ifdef FE_INVALID
+	  if (icls == FP_INFINITE)
+	    feraiseexcept (FE_INVALID);
+#endif
+	}
+    }
+  else if (rcls == FP_INFINITE)
+    {
+      /* Real part is infinite.  */
+      if (icls == FP_ZERO)
+	{
+	  /* Imaginary part is 0.0.  */
+	  __real__ retval = HUGE_VAL;
+	  __imag__ retval = __imag__ x * __copysign (1.0, __real__ x);
+	}
+      else if (icls > FP_ZERO)
+	{
+	  /* Imaginary part is finite.  */
+	  double sinix, cosix;
+
+	  __sincos (__imag__ x, &sinix, &cosix);
+
+	  __real__ retval = __copysign (HUGE_VAL, cosix);
+	  __imag__ retval = (__copysign (HUGE_VAL, sinix)
+			     * __copysign (1.0, __real__ x));
+	}
+      else
+	{
+	  /* The addition raises the invalid exception.  */
+	  __real__ retval = HUGE_VAL;
+	  __imag__ retval = __nan ("") + __nan ("");
+
+#ifdef FE_INVALID
+	  if (icls == FP_INFINITE)
+	    feraiseexcept (FE_INVALID);
+#endif
+	}
+    }
+  else
+    {
+      __real__ retval = __nan ("");
+      __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nan ("");
+    }
+
+  return retval;
+}
+weak_alias (__ccosh, ccosh)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__ccosh, __ccoshl)
+weak_alias (__ccosh, ccoshl)
+#endif