diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/sgn.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/sgn.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/sgn.c b/Build/source/libs/mpfr/mpfr-src/src/sgn.c new file mode 100644 index 00000000000..1e2a7fc5d2f --- /dev/null +++ b/Build/source/libs/mpfr/mpfr-src/src/sgn.c @@ -0,0 +1,40 @@ +/* mpfr_sgn -- Sign of a floating point number. + +Copyright 2003-2004, 2006-2015 Free Software Foundation, Inc. +Contributed by the AriC and Caramel 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 +http://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_sgn) (mpfr_srcptr a) +{ + if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (a))) + { + if (MPFR_LIKELY (MPFR_IS_ZERO (a))) + return 0; + if (MPFR_UNLIKELY (MPFR_IS_NAN (a))) + { + MPFR_SET_ERANGE (); + return 0; + } + /* Remains infinity, handled by the return below. */ + } + return MPFR_INT_SIGN (a); +} |