--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libquadmath/math/ccoshq.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,145 @@
+/* Complex cosine hyperbole function for complex __float128.
+   Copyright (C) 1997-2012 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "quadmath-imp.h"
+
+#ifdef HAVE_FENV_H
+# include <fenv.h>
+#endif
+
+
+__complex128
+ccoshq (__complex128 x)
+{
+  __complex128 retval;
+  int rcls = fpclassifyq (__real__ x);
+  int icls = fpclassifyq (__imag__ x);
+
+  if (__builtin_expect (rcls >= QUADFP_ZERO, 1))
+    {
+      /* Real part is finite.  */
+      if (__builtin_expect (icls >= QUADFP_ZERO, 1))
+	{
+	  /* Imaginary part is finite.  */
+	  const int t = (int) ((FLT128_MAX_EXP - 1) * M_LN2q);
+	  __float128 sinix, cosix;
+
+	  if (__builtin_expect (icls != QUADFP_SUBNORMAL, 1))
+	    {
+	      sincosq (__imag__ x, &sinix, &cosix);
+	    }
+	  else
+	    {
+	      sinix = __imag__ x;
+	      cosix = 1.0Q;
+	    }
+
+	  if (fabsq (__real__ x) > t)
+	    {
+	      __float128 exp_t = expq (t);
+	      __float128 rx = fabsq (__real__ x);
+	      if (signbitq (__real__ x))
+		sinix = -sinix;
+	      rx -= t;
+	      sinix *= exp_t / 2.0Q;
+	      cosix *= exp_t / 2.0Q;
+	      if (rx > t)
+		{
+		  rx -= t;
+		  sinix *= exp_t;
+		  cosix *= exp_t;
+		}
+	      if (rx > t)
+		{
+		  /* Overflow (original real part of x > 3t).  */
+		  __real__ retval = FLT128_MAX * cosix;
+		  __imag__ retval = FLT128_MAX * sinix;
+		}
+	      else
+		{
+		  __float128 exp_val = expq (rx);
+		  __real__ retval = exp_val * cosix;
+		  __imag__ retval = exp_val * sinix;
+		}
+	    }
+	  else
+	    {
+	      __real__ retval = coshq (__real__ x) * cosix;
+	      __imag__ retval = sinhq (__real__ x) * sinix;
+	    }
+	}
+      else
+	{
+	  __imag__ retval = __real__ x == 0.0Q ? 0.0Q : nanq ("");
+	  __real__ retval = nanq ("") + nanq ("");
+
+#ifdef HAVE_FENV_H
+	  if (icls == QUADFP_INFINITE)
+	    feraiseexcept (FE_INVALID);
+#endif
+        }
+    }
+  else if (rcls == QUADFP_INFINITE)
+    {
+      /* Real part is infinite.  */
+      if (__builtin_expect (icls > QUADFP_ZERO, 1))
+	{
+	  /* Imaginary part is finite.  */
+	  __float128 sinix, cosix;
+
+	  if (__builtin_expect (icls != QUADFP_SUBNORMAL, 1))
+	    {
+	      sincosq (__imag__ x, &sinix, &cosix);
+	    }
+	  else
+	    {
+	      sinix = __imag__ x;
+	      cosix = 1.0Q;
+	    }
+
+	  __real__ retval = copysignq (HUGE_VALQ, cosix);
+	  __imag__ retval = (copysignq (HUGE_VALQ, sinix)
+			     * copysignq (1.0Q, __real__ x));
+	}
+      else if (icls == QUADFP_ZERO)
+	{
+	  /* Imaginary part is 0.0.  */
+	  __real__ retval = HUGE_VALQ;
+	  __imag__ retval = __imag__ x * copysignq (1.0Q, __real__ x);
+	}
+      else
+	{
+	  /* The addition raises the invalid exception.  */
+	  __real__ retval = HUGE_VALQ;
+	  __imag__ retval = nanq ("") + nanq ("");
+
+#ifdef HAVE_FENV_H
+	  if (icls == QUADFP_INFINITE)
+	    feraiseexcept (FE_INVALID);
+#endif
+	 }
+    }
+  else
+    {
+      __real__ retval = nanq ("");
+      __imag__ retval = __imag__ x == 0.0 ? __imag__ x : nanq ("");
+    }
+
+  return retval;
+}