From b9e8095bd7c7b1492baf175e1ebf336dc3ff6e4d Mon Sep 17 00:00:00 2001 From: bkoz Date: Fri, 21 Apr 2000 20:33:34 +0000 Subject: 2000-04-21 Benjamin Kosnik * libstdc++-v3: New directory. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@33317 138bc75d-0d04-0410-961f-82ee72b054a4 --- libstdc++-v3/math/signbit.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 libstdc++-v3/math/signbit.c (limited to 'libstdc++-v3/math/signbit.c') diff --git a/libstdc++-v3/math/signbit.c b/libstdc++-v3/math/signbit.c new file mode 100644 index 00000000000..0d58ed88880 --- /dev/null +++ b/libstdc++-v3/math/signbit.c @@ -0,0 +1,41 @@ +/* Return nonzero value if number is negative. */ + +/* Copyright (C) 1997-1999 Free Software Foundation, Inc. + + This file is part of the GNU ISO C++ Library. This library is free + software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the + Free Software Foundation; either version 2, or (at your option) + any later version. + + This 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 General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this library; see the file COPYING. If not, write to the Free + Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, + USA. + + As a special exception, you may use this file as part of a free software + library without restriction. Specifically, if other files instantiate + templates or use macros or inline functions from this file, or you compile + this file and link it with other files to produce an executable, this + file does not by itself cause the resulting executable to be covered by + the GNU General Public License. This exception does not however + invalidate any other reasons why the executable file might be covered by + the GNU General Public License. */ + + +#include +#include "mathconf.h" + +int +__signbit (double x) +{ + Int32_t hx; + + GET_HIGH_WORD (hx, x); + return hx & 0x80000000; +} -- cgit v1.2.1