diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_signbit.c')
-rw-r--r-- | sysdeps/ieee754/dbl-64/s_signbit.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_signbit.c b/sysdeps/ieee754/dbl-64/s_signbit.c new file mode 100644 index 0000000..ee34003 --- /dev/null +++ b/sysdeps/ieee754/dbl-64/s_signbit.c @@ -0,0 +1,32 @@ +/* Return nonzero value if number is negative. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <math.h> + +#include "math_private.h" + +int +__signbit (double x) +{ + int32_t hx; + + GET_HIGH_WORD (hx, x); + return hx & 0x80000000; +} |