[gcc] GCC 4.5.0=>4.5.1

gcc/mpfr/exp.c

Index: gcc/mpfr/exp.c
diff --git a/gcc/mpfr/exp.c b/gcc/mpfr/exp.c
deleted file mode 100644
index 10e859c9c7d2058f2cb72e47996723ae65206e98..0000000000000000000000000000000000000000
--- a/gcc/mpfr/exp.c
+++ /dev/null
@@ -1,163 +0,0 @@
-/* mpfr_exp -- exponential of a floating-point number
-
-Copyright 1999, 2000, 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"
-
-/* #define DEBUG */
-
-int
-mpfr_exp (mpfr_ptr y, mpfr_srcptr x, mp_rnd_t rnd_mode)
-{
-  mp_exp_t expx;
-  mp_prec_t precy;
-  int inexact;
-  MPFR_SAVE_EXPO_DECL (expo);
-
-  MPFR_LOG_FUNC (("x[%#R]=%R rnd=%d", x, x, rnd_mode),
-                 ("y[%#R]=%R inexact=%d", y, y, inexact));
-
-  if (MPFR_UNLIKELY( MPFR_IS_SINGULAR(x) ))
-    {
-      if (MPFR_IS_NAN(x))
-        {
-          MPFR_SET_NAN(y);
-          MPFR_RET_NAN;
-        }
-      else if (MPFR_IS_INF(x))
-        {
-          if (MPFR_IS_POS(x))
-            MPFR_SET_INF(y);
-          else
-            MPFR_SET_ZERO(y);
-          MPFR_SET_POS(y);
-          MPFR_RET(0);
-        }
-      else
-        {
-          MPFR_ASSERTD(MPFR_IS_ZERO(x));
-          return mpfr_set_ui (y, 1, rnd_mode);
-        }
-    }
-
-  /* First, let's detect most overflow and underflow cases. */
-  {
-    mpfr_t e, bound;
-
-    /* We must extended the exponent range and save the flags now. */
-    MPFR_SAVE_EXPO_MARK (expo);
-
-    mpfr_init2 (e, sizeof (mp_exp_t) * CHAR_BIT);
-    mpfr_init2 (bound, 32);
-
-    inexact = mpfr_set_exp_t (e, expo.saved_emax, GMP_RNDN);
-    MPFR_ASSERTD (inexact == 0);
-    mpfr_const_log2 (bound, expo.saved_emax < 0 ? GMP_RNDD : GMP_RNDU);
-    mpfr_mul (bound, bound, e, GMP_RNDU);
-    if (MPFR_UNLIKELY (mpfr_cmp (x, bound) >= 0))
-      {
-        /* x > log(2^emax), thus exp(x) > 2^emax */
-        mpfr_clears (e, bound, (mpfr_ptr) 0);
-        MPFR_SAVE_EXPO_FREE (expo);
-        return mpfr_overflow (y, rnd_mode, 1);
-      }
-
-    inexact = mpfr_set_exp_t (e, expo.saved_emin, GMP_RNDN);
-    MPFR_ASSERTD (inexact == 0);
-    inexact = mpfr_sub_ui (e, e, 2, GMP_RNDN);
-    MPFR_ASSERTD (inexact == 0);
-    mpfr_const_log2 (bound, expo.saved_emin < 0 ? GMP_RNDU : GMP_RNDD);
-    mpfr_mul (bound, bound, e, GMP_RNDD);
-    if (MPFR_UNLIKELY (mpfr_cmp (x, bound) <= 0))
-      {
-        /* x < log(2^(emin - 2)), thus exp(x) < 2^(emin - 2) */
-        mpfr_clears (e, bound, (mpfr_ptr) 0);
-        MPFR_SAVE_EXPO_FREE (expo);
-        return mpfr_underflow (y, rnd_mode == GMP_RNDN ? GMP_RNDZ : rnd_mode,
-                               1);
-      }
-
-    /* Other overflow/underflow cases must be detected
-       by the generic routines. */
-    mpfr_clears (e, bound, (mpfr_ptr) 0);
-    MPFR_SAVE_EXPO_FREE (expo);
-  }
-
-  MPFR_CLEAR_FLAGS (y);
-
-  expx  = MPFR_GET_EXP (x);
-  precy = MPFR_PREC (y);
-
-  /* if x < 2^(-precy), then exp(x) i.e. gives 1 +/- 1 ulp(1) */
-  if (MPFR_UNLIKELY (expx < 0 && (mpfr_uexp_t) (-expx) > precy))
-    {
-      mp_exp_t emin = __gmpfr_emin;
-      mp_exp_t emax = __gmpfr_emax;
-      int signx = MPFR_SIGN (x);
-
-      MPFR_SET_POS (y);
-      if (MPFR_IS_NEG_SIGN (signx) && (rnd_mode == GMP_RNDD ||
-                                       rnd_mode == GMP_RNDZ))
-        {
-          __gmpfr_emin = 0;
-          __gmpfr_emax = 0;
-          mpfr_setmax (y, 0);  /* y = 1 - epsilon */
-          inexact = -1;
-        }
-      else
-        {
-          __gmpfr_emin = 1;
-          __gmpfr_emax = 1;
-          mpfr_setmin (y, 1);  /* y = 1 */
-          if (MPFR_IS_POS_SIGN (signx) && rnd_mode == GMP_RNDU)
-            {
-              mp_size_t yn;
-              int sh;
-
-              yn = 1 + (MPFR_PREC(y) - 1) / BITS_PER_MP_LIMB;
-              sh = (mp_prec_t) yn * BITS_PER_MP_LIMB - MPFR_PREC(y);
-              MPFR_MANT(y)[0] += MPFR_LIMB_ONE << sh;
-              inexact = 1;
-            }
-          else
-            inexact = -MPFR_FROM_SIGN_TO_INT(signx);
-        }
-
-      __gmpfr_emin = emin;
-      __gmpfr_emax = emax;
-    }
-  else  /* General case */
-    {
-      if (MPFR_UNLIKELY (precy > MPFR_EXP_THRESHOLD))
-        /* mpfr_exp_3 saves the exponent range and flags itself, otherwise
-           the flag changes in mpfr_exp_3 are lost */
-        inexact = mpfr_exp_3 (y, x, rnd_mode); /* O(M(n) log(n)^2) */
-      else
-        {
-          MPFR_SAVE_EXPO_MARK (expo);
-          inexact = mpfr_exp_2 (y, x, rnd_mode); /* O(n^(1/3) M(n)) */
-          MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, __gmpfr_flags);
-          MPFR_SAVE_EXPO_FREE (expo);
-        }
-    }
-
-  return mpfr_check_range (y, inexact, rnd_mode);
-}