Subversion Repositories zipcpu

////////////////////////////////////////////////////////////////////////////
//
// Filename: 	twoc.h
//
// Project:	Zip CPU -- a small, lightweight, RISC CPU soft core
//
// Purpose:	Some various two's complement related C++ helper routines.
//		Specifically, these help extract signed numbers from
//		packed bitfields, while guaranteeing that the upper bits
//		are properly sign extended (or not) as desired.
//
// Creator:	Dan Gisselquist, Ph.D.
//		Gisselquist Tecnology, LLC
//
///////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2015, Gisselquist Technology, LLC
//
// This program is free software (firmware): 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 3 of the License, or (at
// your option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY 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.  (It's in the $(ROOT)/doc directory, run make with no
// target there if the PDF file isn't present.)  If not, see
// <http://www.gnu.org/licenses/> for a copy.
//
// License:	GPL, v3, as defined and found on www.gnu.org,
//		http://www.gnu.org/licenses/gpl.html
//
//
///////////////////////////////////////////////////////////////////////////
#ifndef	TWOC_H
#define	TWOC_H
 
extern	long	sbits(const long val, const int bits);
extern	bool	sfits(const long val, const int bits);
extern	unsigned long	ubits(const long val, const int bits);
extern	unsigned long	rndbits(const long val, const int bi, const int bo);
 
#endif