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); |
-} |
- |