--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libquadmath/math/lrintq.c	Sun Aug 21 07:07:55 2011 +0900
@@ -0,0 +1,85 @@
+/* Round argument to nearest integral value according to current rounding
+   direction.
+   Copyright (C) 1997, 1999, 2004, 2006 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 two112[2] =
+{
+  5.19229685853482762853049632922009600E+33Q, /* 0x406F000000000000, 0 */
+ -5.19229685853482762853049632922009600E+33Q  /* 0xC06F000000000000, 0 */
+};
+
+long int
+lrintq (__float128 x)
+{
+  int32_t j0;
+  uint64_t i0,i1;
+  volatile __float128 w;
+  __float128 t;
+  long int result;
+  int sx;
+
+  GET_FLT128_WORDS64 (i0, i1, x);
+  j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;
+  sx = i0 >> 63;
+  i0 &= 0x0000ffffffffffffLL;
+  i0 |= 0x0001000000000000LL;
+
+  if (j0 < 48)
+    {
+      w = two112[sx] + x;
+      t = w - two112[sx];
+      GET_FLT128_WORDS64 (i0, i1, t);
+      j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;
+      i0 &= 0x0000ffffffffffffLL;
+      i0 |= 0x0001000000000000LL;
+
+      result = (j0 < 0 ? 0 : i0 >> (48 - j0));
+    }
+  else if (j0 < (int32_t) (8 * sizeof (long int)) - 1)
+    {
+      if (j0 >= 112)
+	result = ((long int) i0 << (j0 - 48)) | (i1 << (j0 - 112));
+      else
+	{
+	  w = two112[sx] + x;
+	  t = w - two112[sx];
+	  GET_FLT128_WORDS64 (i0, i1, t);
+	  j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;
+	  i0 &= 0x0000ffffffffffffLL;
+	  i0 |= 0x0001000000000000LL;
+
+	  if (j0 == 48)
+	    result = (long int) i0;
+	  else
+	    result = ((long int) i0 << (j0 - 48)) | (i1 >> (112 - j0));
+	}
+    }
+  else
+    {
+      /* The number is too large.  It is left implementation defined
+	 what happens.  */
+      return (long int) x;
+    }
+
+  return sx ? -result : result;
+}