[gcc] GCC 4.5.0=>4.5.1

gcc/mpfr/atanh.c

Index: gcc/mpfr/atanh.c
diff --git a/gcc/mpfr/atanh.c b/gcc/mpfr/atanh.c
deleted file mode 100644
index b0183ad59dc768714260ddd1602a50a6098adc81..0000000000000000000000000000000000000000
--- a/gcc/mpfr/atanh.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/* mpfr_atanh -- Inverse Hyperbolic Tangente
-
-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"
-
- /* The computation of atanh is done by
-       atanh= 1/2*ln(x+1)-1/2*ln(1-x)   */
-
-int
-mpfr_atanh (mpfr_ptr y, mpfr_srcptr xt , mp_rnd_t rnd_mode)
-{
-  int inexact;
-  mpfr_t x, t, te;
-  mp_prec_t Nx, Ny, Nt;
-  mp_exp_t err;
-  MPFR_ZIV_DECL (loop);
-  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 cases */
-  if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (xt)))
-    {
-      /* atanh(NaN) = NaN, and atanh(+/-Inf) = NaN since tanh gives a result
-         between -1 and 1 */
-      if (MPFR_IS_NAN (xt) || MPFR_IS_INF (xt))
-        {
-          MPFR_SET_NAN (y);
-          MPFR_RET_NAN;
-        }
-      else /* necessarily xt is 0 */
-        {
-          MPFR_ASSERTD (MPFR_IS_ZERO (xt));
-          MPFR_SET_ZERO (y);   /* atanh(0) = 0 */
-          MPFR_SET_SAME_SIGN (y,xt);
-          MPFR_RET (0);
-        }
-    }
-
-  /* atanh (x) = NaN as soon as |x| > 1, and arctanh(+/-1) = +/-Inf */
-  if (MPFR_UNLIKELY (MPFR_EXP (xt) > 0))
-    {
-      if (MPFR_EXP (xt) == 1 && mpfr_powerof2_raw (xt))
-        {
-          MPFR_SET_INF (y);
-          MPFR_SET_SAME_SIGN (y, xt);
-          MPFR_RET (0);
-        }
-      MPFR_SET_NAN (y);
-      MPFR_RET_NAN;
-    }
-
-  /* atanh(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, 1,
-                                    rnd_mode, {});
-
-  MPFR_SAVE_EXPO_MARK (expo);
-
-  /* Compute initial precision */
-  Nx = MPFR_PREC (xt);
-  MPFR_TMP_INIT_ABS (x, xt);
-  Ny = MPFR_PREC (y);
-  Nt = MAX (Nx, Ny);
-  /* the optimal number of bits : see algorithms.ps */
-  Nt = Nt + MPFR_INT_CEIL_LOG2 (Nt) + 4;
-
-  /* initialise of intermediary variable */
-  mpfr_init2 (t, Nt);
-  mpfr_init2 (te, Nt);
-
-  /* First computation of cosh */
-  MPFR_ZIV_INIT (loop, Nt);
-  for (;;)
-    {
-      /* compute atanh */
-      mpfr_ui_sub (te, 1, x, GMP_RNDU);   /* (1-xt)*/
-      mpfr_add_ui (t,  x, 1, GMP_RNDD);   /* (xt+1)*/
-      mpfr_div (t, t, te, GMP_RNDN);      /* (1+xt)/(1-xt)*/
-      mpfr_log (t, t, GMP_RNDN);          /* ln((1+xt)/(1-xt))*/
-      mpfr_div_2ui (t, t, 1, GMP_RNDN);   /* (1/2)*ln((1+xt)/(1-xt))*/
-
-      /* error estimate: see algorithms.tex */
-      /* FIXME: this does not correspond to the value in algorithms.tex!!! */
-      /* err=Nt-__gmpfr_ceil_log2(1+5*pow(2,1-MPFR_EXP(t)));*/
-      err = Nt - (MAX (4 - MPFR_GET_EXP (t), 0) + 1);
-
-      if (MPFR_LIKELY (MPFR_IS_ZERO (t)
-                       || MPFR_CAN_ROUND (t, err, Ny, rnd_mode)))
-        break;
-
-      /* reactualisation of the precision */
-      MPFR_ZIV_NEXT (loop, Nt);
-      mpfr_set_prec (t, Nt);
-      mpfr_set_prec (te, Nt);
-    }
-  MPFR_ZIV_FREE (loop);
-
-  inexact = mpfr_set4 (y, t, rnd_mode, MPFR_SIGN (xt));
-
-  mpfr_clear(t);
-  mpfr_clear(te);
-
-  MPFR_SAVE_EXPO_FREE (expo);
-  return mpfr_check_range (y, inexact, rnd_mode);
-}
-