--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libquadmath/math/truncq.c	Sun Aug 21 07:07:55 2011 +0900
@@ -0,0 +1,54 @@
+/* Truncate argument to nearest integral value not larger than the argument.
+   Copyright (C) 1997, 1999 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"
+
+
+__float128
+truncq (__float128 x)
+{
+  int32_t j0;
+  uint64_t i0, i1, sx;
+
+  GET_FLT128_WORDS64 (i0, i1, x);
+  sx = i0 & 0x8000000000000000ULL;
+  j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;
+  if (j0 < 48)
+    {
+      if (j0 < 0)
+	/* The magnitude of the number is < 1 so the result is +-0.  */
+	SET_FLT128_WORDS64 (x, sx, 0);
+      else
+	SET_FLT128_WORDS64 (x, i0 & ~(0x0000ffffffffffffLL >> j0), 0);
+    }
+  else if (j0 > 111)
+    {
+      if (j0 == 0x4000)
+	/* x is inf or NaN.  */
+	return x + x;
+    }
+  else
+    {
+      SET_FLT128_WORDS64 (x, i0, i1 & ~(0xffffffffffffffffULL >> (j0 - 48)));
+    }
+
+  return x;
+}