diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/div_2ui.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/div_2ui.c | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/div_2ui.c b/Build/source/libs/mpfr/mpfr-src/src/div_2ui.c deleted file mode 100644 index 349d8367af3..00000000000 --- a/Build/source/libs/mpfr/mpfr-src/src/div_2ui.c +++ /dev/null @@ -1,69 +0,0 @@ -/* mpfr_div_2ui -- divide a floating-point number by a power of two - -Copyright 1999, 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. */ - -#include "mpfr-impl.h" - -int -mpfr_div_2ui (mpfr_ptr y, mpfr_srcptr x, unsigned long n, mpfr_rnd_t rnd_mode) -{ - int inexact; - - MPFR_LOG_FUNC ( - ("x[%Pu]=%.*Rg n=%lu rnd=%d", mpfr_get_prec(x), mpfr_log_prec, x, n, - rnd_mode), - ("y[%Pu]=%.*Rg inexact=%d", mpfr_get_prec(y), mpfr_log_prec, y, inexact)); - - if (MPFR_UNLIKELY (n == 0 || MPFR_IS_SINGULAR (x))) - return mpfr_set (y, x, rnd_mode); - else - { - mpfr_exp_t exp = MPFR_GET_EXP (x); - mpfr_uexp_t diffexp; - - MPFR_SETRAW (inexact, y, x, exp, rnd_mode); - /* Warning! exp may have increased by 1 due to rounding. Thus the - difference below may overflow in a mpfr_exp_t; but mpfr_uexp_t - is OK to hold the value, with the difference done in unsigned - integer arithmetic in this type. */ - diffexp = (mpfr_uexp_t) exp - (mpfr_uexp_t) (__gmpfr_emin - 1); - if (MPFR_UNLIKELY (n >= diffexp)) /* exp - n <= emin - 1 */ - { - if (rnd_mode == MPFR_RNDN && - (n > diffexp || - ((MPFR_IS_NEG (y) ? inexact <= 0 : inexact >= 0) && - mpfr_powerof2_raw (y)))) - rnd_mode = MPFR_RNDZ; - return mpfr_underflow (y, rnd_mode, MPFR_SIGN (y)); - } - /* Now, n < diffexp, i.e. n <= exp - emin, which a difference of - * two valid exponents + 0 or 1, thus fits in a mpfr_exp_t (from - * the constraints on valid exponents). Moreover, there cannot be - * an overflow (if exp had been increased by 1 due to rounding) - * since the case n = 0 has been filtered out. - */ - MPFR_ASSERTD (n <= MPFR_EXP_MAX); - MPFR_ASSERTD (n >= 1); - MPFR_SET_EXP (y, exp - (mpfr_exp_t) n); - } - - MPFR_RET (inexact); -} |