[gcc] GCC 4.5.0=>4.5.1

gcc/mpfr/div_2si.c

-/* mpfr_div_2si -- divide a floating-point number by a power of two
-
-Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
-Contributed by the Arenaire and Cacao projects, INRIA.
-
-This file is part of the GNU MPFR Library.
-
-The GNU MPFR 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 MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to
-the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
-MA 02110-1301, USA. */
-
-#include "mpfr-impl.h"
-
-int
-mpfr_div_2si (mpfr_ptr y, mpfr_srcptr x, long int n, mp_rnd_t rnd_mode)
-{
-  int inexact;
-
-  MPFR_LOG_FUNC (("x[%#R]=%R n=%ld rnd=%d", x, x, n, rnd_mode),
-                 ("y[%#R]=%R inexact=%d", y, y, inexact));
-
-  inexact = MPFR_UNLIKELY(y != x) ? mpfr_set (y, x, rnd_mode) : 0;
-
-  if (MPFR_LIKELY( MPFR_IS_PURE_FP(y) ))
-    {
-      mp_exp_t exp = MPFR_GET_EXP (y);
-      if (MPFR_UNLIKELY( n > 0 && (__gmpfr_emin > MPFR_EMAX_MAX - n ||
-                                   exp < __gmpfr_emin + n)) )
-        {
-          if (rnd_mode == GMP_RNDN &&
-              (__gmpfr_emin > MPFR_EMAX_MAX - (n - 1) ||
-               exp < __gmpfr_emin + (n - 1) ||
-               (inexact >= 0 && mpfr_powerof2_raw (y))))
-            rnd_mode = GMP_RNDZ;
-          return mpfr_underflow (y, rnd_mode, MPFR_SIGN(y));
-        }
-
-      if (MPFR_UNLIKELY(n < 0 && (__gmpfr_emax < MPFR_EMIN_MIN - n ||
-                                  exp > __gmpfr_emax + n)) )
-        return mpfr_overflow (y, rnd_mode, MPFR_SIGN(y));
-
-      MPFR_SET_EXP (y, exp - n);
-    }
-
-  return inexact;
-}