diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/sub.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/sub.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/sub.c b/Build/source/libs/mpfr/mpfr-src/src/sub.c deleted file mode 100644 index 6b21b8beb29..00000000000 --- a/Build/source/libs/mpfr/mpfr-src/src/sub.c +++ /dev/null @@ -1,134 +0,0 @@ -/* mpfr_sub -- subtract two floating-point numbers - -Copyright 2001-2004, 2006-2020 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" - -MPFR_HOT_FUNCTION_ATTR int -mpfr_sub (mpfr_ptr a, mpfr_srcptr b, mpfr_srcptr c, mpfr_rnd_t rnd_mode) -{ - MPFR_LOG_FUNC - (("b[%Pu]=%.*Rg c[%Pu]=%.*Rg rnd=%d", - mpfr_get_prec (b), mpfr_log_prec, b, - mpfr_get_prec (c), mpfr_log_prec, c, rnd_mode), - ("a[%Pu]=%.*Rg", mpfr_get_prec (a), mpfr_log_prec, a)); - - if (MPFR_ARE_SINGULAR_OR_UBF (b,c)) - { - if (MPFR_IS_NAN (b) || MPFR_IS_NAN (c)) - { - MPFR_SET_NAN (a); - MPFR_RET_NAN; - } - else if (MPFR_IS_INF (b)) - { - if (!MPFR_IS_INF (c) || MPFR_SIGN (b) != MPFR_SIGN(c)) - { - MPFR_SET_INF (a); - MPFR_SET_SAME_SIGN (a, b); - MPFR_RET (0); /* exact */ - } - else - { - MPFR_SET_NAN (a); /* Inf - Inf */ - MPFR_RET_NAN; - } - } - else if (MPFR_IS_INF (c)) - { - MPFR_SET_INF (a); - MPFR_SET_OPPOSITE_SIGN (a, c); - MPFR_RET (0); /* exact */ - } - else if (MPFR_IS_ZERO (b)) - { - if (MPFR_IS_ZERO (c)) - { - int sign = rnd_mode != MPFR_RNDD - ? ((MPFR_IS_NEG(b) && MPFR_IS_POS(c)) ? -1 : 1) - : ((MPFR_IS_POS(b) && MPFR_IS_NEG(c)) ? 1 : -1); - MPFR_SET_SIGN (a, sign); - MPFR_SET_ZERO (a); - MPFR_RET(0); /* 0 - 0 is exact */ - } - else - return mpfr_neg (a, c, rnd_mode); - } - else if (MPFR_IS_ZERO (c)) - { - return mpfr_set (a, b, rnd_mode); - } - else - { - MPFR_ASSERTD (MPFR_IS_PURE_UBF (b)); - MPFR_ASSERTD (MPFR_IS_PURE_UBF (c)); - /* mpfr_sub1sp and mpfr_add1sp are not intended to support UBF, - for which optimization is less important. */ - if (MPFR_SIGN(b) == MPFR_SIGN(c)) - return mpfr_sub1 (a, b, c, rnd_mode); - else if (MPFR_UBF_EXP_LESS_P (b, c)) - { - int inexact; - rnd_mode = MPFR_INVERT_RND (rnd_mode); - inexact = mpfr_add1 (a, c, b, rnd_mode); - MPFR_CHANGE_SIGN (a); - return -inexact; - } - else - return mpfr_add1 (a, b, c, rnd_mode); - } - } - - MPFR_ASSERTD (MPFR_IS_PURE_FP (b)); - MPFR_ASSERTD (MPFR_IS_PURE_FP (c)); - - if (MPFR_LIKELY (MPFR_SIGN (b) == MPFR_SIGN (c))) - { /* signs are equal, it's a real subtraction */ - if (MPFR_LIKELY (MPFR_PREC (a) == MPFR_PREC (b) - && MPFR_PREC (b) == MPFR_PREC (c))) - return mpfr_sub1sp (a, b, c, rnd_mode); - else - return mpfr_sub1 (a, b, c, rnd_mode); - } - else - { /* signs differ, it's an addition */ - if (MPFR_GET_EXP (b) < MPFR_GET_EXP (c)) - { /* exchange rounding modes toward +/- infinity */ - int inexact; - rnd_mode = MPFR_INVERT_RND (rnd_mode); - if (MPFR_LIKELY (MPFR_PREC (a) == MPFR_PREC (b) - && MPFR_PREC (b) == MPFR_PREC (c))) - inexact = mpfr_add1sp (a, c, b, rnd_mode); - else - inexact = mpfr_add1 (a, c, b, rnd_mode); - MPFR_CHANGE_SIGN (a); - return -inexact; - } - else - { - if (MPFR_LIKELY (MPFR_PREC (a) == MPFR_PREC (b) - && MPFR_PREC (b) == MPFR_PREC (c))) - return mpfr_add1sp (a, b, c, rnd_mode); - else - return mpfr_add1 (a, b, c, rnd_mode); - } - } -} |