abs_s64.comp

//   This is a component for Machinekit
//   Copyright 2011 Sebastian Kuzminsky <seb@highlab.com>
//
//   Adapted for 64 bit ArcEye <arceyeATmgwareDOTcoDOTuk>
//
//   This program is free software; you can redistribute it and/or
//   modify it under the terms of version 2 of the GNU General
//   Public License as published by the Free Software Foundation.
//
//   This program 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 program; if not, write to the Free Software
//   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
component abs_s64 "Compute the absolute value and sign of the input signal";

pin in s64 in "input value" ;
pin out s64 out "output value, always non-negative";
pin out bit sign "Sign of input, false for positive, true for negative" ;
pin out bit is_positive "true if input is positive, false if input is 0 or negative";
pin out bit is_negative "true if input is negative, false if input is 0 or positive";

option period no;
function _;
license "GPL";
author "ArcEye based on code from Sebastian Kuzminsky";
;;
FUNCTION(_)
{
    if ( in >= 0 ) {
        sign = false;
        out = in;
    } else {
        sign = true;
        out = -in;
    }

    if (in > 0)
        is_positive = true;
    else
        is_positive = false;

    if (in < 0)
        is_negative = true;
    else
        is_negative = false;
}