diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/total_order.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/total_order.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/total_order.c b/Build/source/libs/mpfr/mpfr-src/src/total_order.c new file mode 100644 index 00000000000..c0999f2d13c --- /dev/null +++ b/Build/source/libs/mpfr/mpfr-src/src/total_order.c @@ -0,0 +1,42 @@ +/* mpfr_total_order_p -- total order of two floating-point numbers + +Copyright 2018-2020 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" + +/* follows IEEE 754-2008, Section 5.10 */ +int +mpfr_total_order_p (mpfr_srcptr x, mpfr_srcptr y) +{ + if (MPFR_SIGN (x) != MPFR_SIGN (y)) + return MPFR_IS_POS (y); + + if (MPFR_IS_NAN (x)) + return MPFR_IS_NAN (y) || MPFR_IS_NEG (x); + + /* Now x is not NaN. */ + if (MPFR_IS_NAN (y)) + return MPFR_IS_POS (y); /* x < +NaN, x > -NaN */ + + /* Now neither x nor y is NaN, and zeros of different sign have + already been taken into account. */ + return mpfr_lessequal_p (x, y); +} |