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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/tan.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/tan.c | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/tan.c b/Build/source/libs/mpfr/mpfr-src/src/tan.c deleted file mode 100644 index ccdaa907a8b..00000000000 --- a/Build/source/libs/mpfr/mpfr-src/src/tan.c +++ /dev/null @@ -1,89 +0,0 @@ -/* mpfr_tan -- tangent of a floating-point number - -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" - -/* computes tan(x) = sign(x)*sqrt(1/cos(x)^2-1) */ -int -mpfr_tan (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd_mode) -{ - mpfr_prec_t precy, m; - int inexact; - mpfr_t s, c; - MPFR_ZIV_DECL (loop); - MPFR_SAVE_EXPO_DECL (expo); - MPFR_GROUP_DECL (group); - - MPFR_LOG_FUNC - (("x[%Pu]=%.*Rg rnd=%d", mpfr_get_prec (x), mpfr_log_prec, x, rnd_mode), - ("y[%Pu]=%.*Rg inexact=%d", - mpfr_get_prec (y), mpfr_log_prec, y, inexact)); - - if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(x))) - { - if (MPFR_IS_NAN(x) || MPFR_IS_INF(x)) - { - MPFR_SET_NAN(y); - MPFR_RET_NAN; - } - else /* x is zero */ - { - MPFR_ASSERTD(MPFR_IS_ZERO(x)); - MPFR_SET_ZERO(y); - MPFR_SET_SAME_SIGN(y, x); - MPFR_RET(0); - } - } - - /* tan(x) = x + x^3/3 + ... so the error is < 2^(3*EXP(x)-1) */ - MPFR_FAST_COMPUTE_IF_SMALL_INPUT (y, x, -2 * MPFR_GET_EXP (x), 1, 1, - rnd_mode, {}); - - MPFR_SAVE_EXPO_MARK (expo); - - /* Compute initial precision */ - precy = MPFR_PREC (y); - m = precy + MPFR_INT_CEIL_LOG2 (precy) + 13; - MPFR_ASSERTD (m >= 2); /* needed for the error analysis in algorithms.tex */ - - MPFR_GROUP_INIT_2 (group, m, s, c); - MPFR_ZIV_INIT (loop, m); - for (;;) - { - /* The only way to get an overflow is to get ~ Pi/2 - But the result will be ~ 2^Prec(y). */ - mpfr_sin_cos (s, c, x, MPFR_RNDN); /* err <= 1/2 ulp on s and c */ - mpfr_div (c, s, c, MPFR_RNDN); /* err <= 4 ulps */ - MPFR_ASSERTD (!MPFR_IS_SINGULAR (c)); - if (MPFR_LIKELY (MPFR_CAN_ROUND (c, m - 2, precy, rnd_mode))) - break; - MPFR_ZIV_NEXT (loop, m); - MPFR_GROUP_REPREC_2 (group, m, s, c); - } - MPFR_ZIV_FREE (loop); - inexact = mpfr_set (y, c, rnd_mode); - MPFR_GROUP_CLEAR (group); - - MPFR_SAVE_EXPO_FREE (expo); - return mpfr_check_range (y, inexact, rnd_mode); -} |