[gcc] GCC 4.5.0=>4.5.1

gcc/mpfr/tanh.c

Index: gcc/mpfr/tanh.c
diff --git a/gcc/mpfr/tanh.c b/gcc/mpfr/tanh.c
deleted file mode 100644
index c22eab9151c1800ff789bcf2ac6c42fbeba5561f..0000000000000000000000000000000000000000
--- a/gcc/mpfr/tanh.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/* mpfr_tanh -- hyperbolic tangent
-
-Copyright 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. */
-
-#define MPFR_NEED_LONGLONG_H
-#include "mpfr-impl.h"
-
-int
-mpfr_tanh (mpfr_ptr y, mpfr_srcptr xt , mp_rnd_t rnd_mode)
-{
-  /****** Declaration ******/
-  mpfr_t x;
-  int inexact;
-  MPFR_SAVE_EXPO_DECL (expo);
-
-  MPFR_LOG_FUNC (("x[%#R]=%R rnd=%d", xt, xt, rnd_mode),
-                 ("y[%#R]=%R inexact=%d", y, y, inexact));
-
-  /* Special value checking */
-  if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (xt)))
-    {
-      if (MPFR_IS_NAN (xt))
-        {
-          MPFR_SET_NAN (y);
-          MPFR_RET_NAN;
-        }
-      else if (MPFR_IS_INF (xt))
-        {
-          /* tanh(inf) = 1 && tanh(-inf) = -1 */
-          return mpfr_set_si (y, MPFR_INT_SIGN (xt), rnd_mode);
-        }
-      else /* tanh (0) = 0 and xt is zero */
-        {
-          MPFR_ASSERTD (MPFR_IS_ZERO(xt));
-          MPFR_SET_ZERO (y);
-          MPFR_SET_SAME_SIGN (y, xt);
-          MPFR_RET (0);
-        }
-    }
-
-  /* tanh(x) = x - x^3/3 + ... so the error is < 2^(3*EXP(x)-1) */
-  MPFR_FAST_COMPUTE_IF_SMALL_INPUT (y, xt, -2 * MPFR_GET_EXP (xt), 1, 0,
-                                    rnd_mode, {});
-
-  MPFR_TMP_INIT_ABS (x, xt);
-
-  MPFR_SAVE_EXPO_MARK (expo);
-
-  /* General case */
-  {
-    /* Declaration of the intermediary variable */
-    mpfr_t t, te;
-    mp_exp_t d;
-
-    /* Declaration of the size variable */
-    mp_prec_t Ny = MPFR_PREC(y);   /* target precision */
-    mp_prec_t Nt;                  /* working precision */
-    long int err;                  /* error */
-    int sign = MPFR_SIGN (xt);
-    MPFR_ZIV_DECL (loop);
-    MPFR_GROUP_DECL (group);
-
-    /* First check for BIG overflow of exp(2*x):
-       For x > 0, exp(2*x) > 2^(2*x)
-       If 2 ^(2*x) > 2^emax or x>emax/2, there is an overflow */
-    if (MPFR_UNLIKELY (mpfr_cmp_si (x, __gmpfr_emax/2) >= 0)) {
-      /* initialise of intermediary variables
-         since 'set_one' label assumes the variables have been
-         initialize */
-      MPFR_GROUP_INIT_2 (group, MPFR_PREC_MIN, t, te);
-      goto set_one;
-    }
-
-    /* Compute the precision of intermediary variable */
-    /* The optimal number of bits: see algorithms.tex */
-    Nt = Ny + MPFR_INT_CEIL_LOG2 (Ny) + 4;
-    /* if x is small, there will be a cancellation in exp(2x)-1 */
-    if (MPFR_GET_EXP (x) < 0)
-      Nt += -MPFR_GET_EXP (x);
-
-    /* initialise of intermediary variable */
-    MPFR_GROUP_INIT_2 (group, Nt, t, te);
-
-    MPFR_ZIV_INIT (loop, Nt);
-    for (;;) {
-      /* tanh = (exp(2x)-1)/(exp(2x)+1) */
-      mpfr_mul_2ui (te, x, 1, GMP_RNDN);  /* 2x */
-      /* since x > 0, we can only have an overflow */
-      mpfr_exp (te, te, GMP_RNDN);        /* exp(2x) */
-      if (MPFR_UNLIKELY (MPFR_IS_INF (te))) {
-      set_one:
-        inexact = MPFR_FROM_SIGN_TO_INT (sign);
-        mpfr_set4 (y, __gmpfr_one, GMP_RNDN, sign);
-        if (MPFR_IS_LIKE_RNDZ (rnd_mode, MPFR_IS_NEG_SIGN (sign)))
-          {
-            inexact = -inexact;
-            mpfr_nexttozero (y);
-          }
-        break;
-      }
-      d = MPFR_GET_EXP (te);              /* For Error calculation */
-      mpfr_add_ui (t, te, 1, GMP_RNDD);   /* exp(2x) + 1*/
-      mpfr_sub_ui (te, te, 1, GMP_RNDU);  /* exp(2x) - 1*/
-      d = d - MPFR_GET_EXP (te);
-      mpfr_div (t, te, t, GMP_RNDN);      /* (exp(2x)-1)/(exp(2x)+1)*/
-
-      /* Calculation of the error */
-      d = MAX(3, d + 1);
-      err = Nt - (d + 1);
-
-      if (MPFR_LIKELY ((d <= Nt / 2) && MPFR_CAN_ROUND (t, err, Ny, rnd_mode)))
-        {
-          inexact = mpfr_set4 (y, t, rnd_mode, sign);
-          break;
-        }
-
-      /* if t=1, we still can round since |sinh(x)| < 1 */
-      if (MPFR_GET_EXP (t) == 1)
-        goto set_one;
-
-      /* Actualisation of the precision */
-      MPFR_ZIV_NEXT (loop, Nt);
-      MPFR_GROUP_REPREC_2 (group, Nt, t, te);
-    }
-    MPFR_ZIV_FREE (loop);
-    MPFR_GROUP_CLEAR (group);
-  }
-  MPFR_SAVE_EXPO_FREE (expo);
-  inexact = mpfr_check_range (y, inexact, rnd_mode);
-
-  return inexact;
-}
-