diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/sinh_cosh.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/sinh_cosh.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/sinh_cosh.c b/Build/source/libs/mpfr/mpfr-src/src/sinh_cosh.c deleted file mode 100644 index 5e5764cd858..00000000000 --- a/Build/source/libs/mpfr/mpfr-src/src/sinh_cosh.c +++ /dev/null @@ -1,158 +0,0 @@ -/* mpfr_sinh_cosh -- hyperbolic sine and cosine - -Copyright 2001-2020 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 computations are done by - cosh(x) = 1/2 [e^(x)+e^(-x)] - sinh(x) = 1/2 [e^(x)-e^(-x)] - Adapted from mpfr_sinh.c */ - -int -mpfr_sinh_cosh (mpfr_ptr sh, mpfr_ptr ch, mpfr_srcptr xt, mpfr_rnd_t rnd_mode) -{ - mpfr_t x; - int inexact_sh, inexact_ch; - - MPFR_ASSERTN (sh != ch); - - MPFR_LOG_FUNC - (("x[%Pu]=%.*Rg rnd=%d", - mpfr_get_prec (xt), mpfr_log_prec, xt, rnd_mode), - ("sh[%Pu]=%.*Rg ch[%Pu]=%.*Rg", - mpfr_get_prec (sh), mpfr_log_prec, sh, - mpfr_get_prec (ch), mpfr_log_prec, ch)); - - if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (xt))) - { - if (MPFR_IS_NAN (xt)) - { - MPFR_SET_NAN (ch); - MPFR_SET_NAN (sh); - MPFR_RET_NAN; - } - else if (MPFR_IS_INF (xt)) - { - MPFR_SET_INF (sh); - MPFR_SET_SAME_SIGN (sh, xt); - MPFR_SET_INF (ch); - MPFR_SET_POS (ch); - MPFR_RET (0); - } - else /* xt is zero */ - { - MPFR_ASSERTD (MPFR_IS_ZERO (xt)); - MPFR_SET_ZERO (sh); /* sinh(0) = 0 */ - MPFR_SET_SAME_SIGN (sh, xt); - inexact_sh = 0; - inexact_ch = mpfr_set_ui (ch, 1, rnd_mode); /* cosh(0) = 1 */ - return INEX(inexact_sh,inexact_ch); - } - } - - /* Warning: if we use MPFR_FAST_COMPUTE_IF_SMALL_INPUT here, make sure - that the code also works in case of overlap (see sin_cos.c) */ - - MPFR_TMP_INIT_ABS (x, xt); - - { - mpfr_t s, c, ti; - mpfr_exp_t d; - mpfr_prec_t N; /* Precision of the intermediary variables */ - long int err; /* Precision of error */ - MPFR_ZIV_DECL (loop); - MPFR_SAVE_EXPO_DECL (expo); - MPFR_GROUP_DECL (group); - - MPFR_SAVE_EXPO_MARK (expo); - - /* compute the precision of intermediary variable */ - N = MPFR_PREC (ch); - N = MAX (N, MPFR_PREC (sh)); - /* the optimal number of bits : see algorithms.ps */ - N = N + MPFR_INT_CEIL_LOG2 (N) + 4; - - /* initialize of intermediary variables */ - MPFR_GROUP_INIT_3 (group, N, s, c, ti); - - /* First computation of sinh_cosh */ - MPFR_ZIV_INIT (loop, N); - for (;;) - { - MPFR_BLOCK_DECL (flags); - - /* compute sinh_cosh */ - MPFR_BLOCK (flags, mpfr_exp (s, x, MPFR_RNDD)); - if (MPFR_OVERFLOW (flags)) - /* exp(x) does overflow */ - { - /* since cosh(x) >= exp(x), cosh(x) overflows too */ - inexact_ch = mpfr_overflow (ch, rnd_mode, MPFR_SIGN_POS); - /* sinh(x) may be representable */ - inexact_sh = mpfr_sinh (sh, xt, rnd_mode); - MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, MPFR_FLAGS_OVERFLOW); - break; - } - d = MPFR_GET_EXP (s); - mpfr_ui_div (ti, 1, s, MPFR_RNDU); /* 1/exp(x) */ - mpfr_add (c, s, ti, MPFR_RNDU); /* exp(x) + 1/exp(x) */ - mpfr_sub (s, s, ti, MPFR_RNDN); /* exp(x) - 1/exp(x) */ - mpfr_div_2ui (c, c, 1, MPFR_RNDN); /* 1/2(exp(x) + 1/exp(x)) */ - mpfr_div_2ui (s, s, 1, MPFR_RNDN); /* 1/2(exp(x) - 1/exp(x)) */ - - /* it may be that s is zero (in fact, it can only occur when exp(x)=1, - and thus ti=1 too) */ - if (MPFR_IS_ZERO (s)) - err = N; /* double the precision */ - else - { - /* calculation of the error */ - d = d - MPFR_GET_EXP (s) + 2; - /* error estimate: err = N-(__gmpfr_ceil_log2(1+pow(2,d)));*/ - err = N - (MAX (d, 0) + 1); - if (MPFR_LIKELY (MPFR_CAN_ROUND (s, err, MPFR_PREC (sh), - rnd_mode) && \ - MPFR_CAN_ROUND (c, err, MPFR_PREC (ch), - rnd_mode))) - { - inexact_sh = mpfr_set4 (sh, s, rnd_mode, MPFR_SIGN (xt)); - inexact_ch = mpfr_set (ch, c, rnd_mode); - break; - } - } - /* actualization of the precision */ - N += err; - MPFR_ZIV_NEXT (loop, N); - MPFR_GROUP_REPREC_3 (group, N, s, c, ti); - } - MPFR_ZIV_FREE (loop); - MPFR_GROUP_CLEAR (group); - MPFR_SAVE_EXPO_FREE (expo); - } - - /* now, let's raise the flags if needed */ - inexact_sh = mpfr_check_range (sh, inexact_sh, rnd_mode); - inexact_ch = mpfr_check_range (ch, inexact_ch, rnd_mode); - - return INEX(inexact_sh,inexact_ch); -} |