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////////////////////////////////////////////////////////////////////////////

//

// 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