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[/] [zipcpu/] [trunk/] [sw/] [zasm/] [twoc.h] - Rev 58
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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
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