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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/cosh.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/cosh.c | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/cosh.c b/Build/source/libs/mpfr/mpfr-src/src/cosh.c deleted file mode 100644 index 4e878331590..00000000000 --- a/Build/source/libs/mpfr/mpfr-src/src/cosh.c +++ /dev/null @@ -1,128 +0,0 @@ -/* mpfr_cosh -- hyperbolic cosine - -Copyright 2001-2002, 2004-2020 Free Software Foundation, Inc. -Contributed by the AriC and Caramba 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 3 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.LESSER. If not, see -https://www.gnu.org/licenses/ or 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 cosh is done by * - * cosh= 1/2[e^(x)+e^(-x)] */ - -int -mpfr_cosh (mpfr_ptr y, mpfr_srcptr xt , mpfr_rnd_t rnd_mode) -{ - mpfr_t x; - int inexact; - MPFR_SAVE_EXPO_DECL (expo); - - MPFR_LOG_FUNC ( - ("x[%Pu]=%*.Rg rnd=%d", mpfr_get_prec (xt), mpfr_log_prec, xt, rnd_mode), - ("y[%Pu]=%*.Rg inexact=%d", mpfr_get_prec (y), mpfr_log_prec, y, - inexact)); - - 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)) - { - MPFR_SET_INF(y); - MPFR_SET_POS(y); - MPFR_RET(0); - } - else - { - MPFR_ASSERTD(MPFR_IS_ZERO(xt)); - return mpfr_set_ui (y, 1, rnd_mode); /* cosh(0) = 1 */ - } - } - - MPFR_SAVE_EXPO_MARK (expo); - - /* cosh(x) = 1+x^2/2 + ... <= 1+x^2 for x <= 2.9828..., - thus the error < 2^(2*EXP(x)). If x >= 1, then EXP(x) >= 1, - thus the following will always fail. */ - MPFR_FAST_COMPUTE_IF_SMALL_INPUT (y, __gmpfr_one, -2 * MPFR_GET_EXP (xt), 0, - 1, rnd_mode, inexact = _inexact; goto end); - - MPFR_TMP_INIT_ABS(x, xt); - /* General case */ - { - /* Declaration of the intermediary variable */ - mpfr_t t, te; - /* Declaration of the size variable */ - mpfr_prec_t Ny = MPFR_PREC(y); /* Precision of output variable */ - mpfr_prec_t Nt; /* Precision of the intermediary variable */ - long int err; /* Precision of error */ - MPFR_ZIV_DECL (loop); - MPFR_GROUP_DECL (group); - - /* compute the precision of intermediary variable */ - /* The optimal number of bits : see algorithms.tex */ - Nt = Ny + 3 + MPFR_INT_CEIL_LOG2 (Ny); - - /* initialize of intermediary variables */ - MPFR_GROUP_INIT_2 (group, Nt, t, te); - - /* First computation of cosh */ - MPFR_ZIV_INIT (loop, Nt); - for (;;) - { - MPFR_BLOCK_DECL (flags); - - /* Compute cosh */ - MPFR_BLOCK (flags, mpfr_exp (te, x, MPFR_RNDD)); /* exp(x) */ - /* exp can overflow (but not underflow since x>0) */ - if (MPFR_OVERFLOW (flags)) - /* cosh(x) > exp(x), cosh(x) underflows too */ - { - inexact = mpfr_overflow (y, rnd_mode, MPFR_SIGN_POS); - MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, MPFR_FLAGS_OVERFLOW); - break; - } - mpfr_ui_div (t, 1, te, MPFR_RNDU); /* 1/exp(x) */ - mpfr_add (t, te, t, MPFR_RNDU); /* exp(x) + 1/exp(x)*/ - mpfr_div_2ui (t, t, 1, MPFR_RNDN); /* 1/2(exp(x) + 1/exp(x))*/ - - /* Estimation of the error */ - err = Nt - 3; - /* Check if we can round */ - if (MPFR_LIKELY (MPFR_CAN_ROUND (t, err, Ny, rnd_mode))) - { - inexact = mpfr_set (y, t, rnd_mode); - break; - } - - /* 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); - } - - end: - MPFR_SAVE_EXPO_FREE (expo); - return mpfr_check_range (y, inexact, rnd_mode); -} |