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author | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2016-02-22 06:02:38 +0000 |
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committer | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2016-02-22 06:02:38 +0000 |
commit | b2ef5d127f546fa32f303b1dedfc4a6390ad677e (patch) | |
tree | 17cd90adb54888579df0e08223bf4909332380c2 /Build/source/libs/mpfr/mpfr-src/src/copysign.c | |
parent | 05d739843a7c50294efbda2abf2ab4ea3fc146b1 (diff) |
libs/mpfr: New convention
git-svn-id: svn://tug.org/texlive/trunk@39814 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/copysign.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/copysign.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/copysign.c b/Build/source/libs/mpfr/mpfr-src/src/copysign.c new file mode 100644 index 00000000000..96c18137531 --- /dev/null +++ b/Build/source/libs/mpfr/mpfr-src/src/copysign.c @@ -0,0 +1,38 @@ +/* mpfr_copysign -- Produce a value with the magnitude of x and sign bit of y + +Copyright 2001-2004, 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" + + /* + The computation of z with magnitude of x and sign of y: + z = (-1)^signbit(y) * abs(x), i.e. with the same sign bit as y, + even if z is a NaN. + Note: This function implements copysign from the IEEE-754 standard + when no rounding occurs (e.g. if PREC(z) >= PREC(x)). + */ + +#undef mpfr_copysign +int +mpfr_copysign (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, mpfr_rnd_t rnd_mode) +{ + return mpfr_set4 (z, x, rnd_mode, MPFR_SIGN (y)); +} |