--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libquadmath/math/remquoq.c	Sun Aug 21 07:07:55 2011 +0900
@@ -0,0 +1,107 @@
+/* Compute remainder and a congruent to the quotient.
+   Copyright (C) 1997, 1999, 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
+		  Jakub Jelinek <jj@ultra.linux.cz>, 1999.
+
+   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 "quadmath-imp.h"
+
+
+static const __float128 zero = 0.0;
+
+
+__float128
+remquoq (__float128 x, __float128 y, int *quo)
+{
+  int64_t hx,hy;
+  uint64_t sx,lx,ly,qs;
+  int cquo;
+
+  GET_FLT128_WORDS64 (hx, lx, x);
+  GET_FLT128_WORDS64 (hy, ly, y);
+  sx = hx & 0x8000000000000000ULL;
+  qs = sx ^ (hy & 0x8000000000000000ULL);
+  hy &= 0x7fffffffffffffffLL;
+  hx &= 0x7fffffffffffffffLL;
+
+  /* Purge off exception values.  */
+  if ((hy | ly) == 0)
+    return (x * y) / (x * y); 			/* y = 0 */
+  if ((hx >= 0x7fff000000000000LL)		/* x not finite */
+      || ((hy >= 0x7fff000000000000LL)		/* y is NaN */
+	  && (((hy - 0x7fff000000000000LL) | ly) != 0)))
+    return (x * y) / (x * y);
+
+  if (hy <= 0x7ffbffffffffffffLL)
+    x = fmodq (x, 8 * y);              /* now x < 8y */
+      
+  if (((hx - hy) | (lx - ly)) == 0)
+    {
+      *quo = qs ? -1 : 1;
+      return zero * x;
+    }
+
+  x  = fabsq (x);
+  y  = fabsq (y);
+  cquo = 0;
+
+  if (x >= 4 * y)
+    {
+      x -= 4 * y;
+      cquo += 4;
+    }
+  if (x >= 2 * y)
+    {
+      x -= 2 * y;
+      cquo += 2;
+    }
+
+  if (hy < 0x0002000000000000LL)
+    {
+      if (x + x > y)
+	{
+	  x -= y;
+	  ++cquo;
+	  if (x + x >= y)
+	    {
+	      x -= y;
+	      ++cquo;
+	    }
+	}
+    }
+  else
+    {
+      __float128 y_half = 0.5Q * y;
+      if (x > y_half)
+	{
+	  x -= y;
+	  ++cquo;
+	  if (x >= y_half)
+	    {
+	      x -= y;
+	      ++cquo;
+	    }
+	}
+    }
+
+  *quo = qs ? -cquo : cquo;
+
+  if (sx)
+    x = -x;
+  return x;
+}