--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libquadmath/strtod/mpn2flt128.c	Sun Aug 21 07:07:55 2011 +0900
@@ -0,0 +1,51 @@
+/* Copyright (C) 1995,1996,1997,1998,1999,2002,2003
+	Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <config.h>
+#include <float.h>
+#include <math.h>
+#include "../printf/gmp-impl.h"
+
+/* Convert a multi-precision integer of the needed number of bits (113 for
+   long double) and an integral power of two to a `long double' in IEEE854
+   quad-precision format.  */
+
+__float128
+mpn_construct_float128 (mp_srcptr frac_ptr, int expt, int sign)
+{
+  ieee854_float128 u;
+
+  u.ieee.negative = sign;
+  u.ieee.exponent = expt + IEEE854_FLOAT128_BIAS;
+#if BITS_PER_MP_LIMB == 32
+  u.ieee.mant_low = (((uint64_t) frac_ptr[1]) << 32)
+		    | (frac_ptr[0] & 0xffffffff);
+  u.ieee.mant_high = (((uint64_t) frac_ptr[3]
+		       & (((mp_limb_t) 1 << (FLT128_MANT_DIG - 96)) - 1))
+		      << 32) | (frac_ptr[2] & 0xffffffff);
+#elif BITS_PER_MP_LIMB == 64
+  u.ieee.mant_low = frac_ptr[0];
+  u.ieee.mant_high = frac_ptr[1]
+		     & (((mp_limb_t) 1 << (FLT128_MANT_DIG - 64)) - 1);
+#else
+  #error "mp_limb size " BITS_PER_MP_LIMB "not accounted for"
+#endif
+
+  return u.value;
+}