159 lines
4.3 KiB
C++
159 lines
4.3 KiB
C++
#ifndef __vvm_H
|
|
#define __vvm_H
|
|
/*
|
|
* Copyright (c) 1998-2000 Stephen Williams (steve@icarus.com)
|
|
*
|
|
* This source code is free software; you can redistribute it
|
|
* and/or modify it in source code form under the terms of the GNU
|
|
* General Public License as published by the Free Software
|
|
* Foundation; either version 2 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
|
|
* 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
|
|
*/
|
|
#if !defined(WINNT) && !defined(macintosh)
|
|
#ident "$Id: vvm.h,v 1.36 2000/04/10 05:26:06 steve Exp $"
|
|
#endif
|
|
|
|
# include <cassert>
|
|
# include "vpi_priv.h"
|
|
|
|
/*
|
|
* The Verilog Virtual Machine are definitions for the virtual machine
|
|
* that executes models that the simulation generator makes.
|
|
*/
|
|
|
|
typedef unsigned vvm_u32;
|
|
|
|
class vvm_event;
|
|
class vvm_thread;
|
|
class ostream;
|
|
|
|
|
|
inline vpip_bit_t B_AND(vpip_bit_t l, vpip_bit_t r)
|
|
{
|
|
if (B_IS0(l)) return St0;
|
|
if (B_IS0(r)) return St0;
|
|
if (B_IS1(l) && B_IS1(r)) return St1;
|
|
return StX;
|
|
}
|
|
|
|
inline vpip_bit_t B_OR(vpip_bit_t l, vpip_bit_t r)
|
|
{
|
|
if (B_IS1(l)) return St1;
|
|
if (B_IS1(r)) return St1;
|
|
if (B_IS0(l) && B_IS0(r)) return St0;
|
|
return StX;
|
|
}
|
|
|
|
inline vpip_bit_t B_XOR(vpip_bit_t l, vpip_bit_t r)
|
|
{
|
|
if (B_ISZ(l)) return StX;
|
|
if (B_ISZ(r)) return StX;
|
|
if (B_ISX(l)) return StX;
|
|
if (B_ISX(r)) return StX;
|
|
if (B_IS0(l)) return r;
|
|
return B_IS0(r)? St1 : St0;
|
|
}
|
|
|
|
inline vpip_bit_t less_with_cascade(vpip_bit_t l, vpip_bit_t r, vpip_bit_t c)
|
|
{
|
|
if (B_ISXZ(l)) return StX;
|
|
if (B_ISXZ(r)) return StX;
|
|
if ((l&0x80) > (r&0x80)) return St0;
|
|
if ((l&0x80) < (r&0x80)) return St1;
|
|
return c;
|
|
}
|
|
|
|
inline vpip_bit_t greater_with_cascade(vpip_bit_t l, vpip_bit_t r, vpip_bit_t c)
|
|
{
|
|
if (B_ISXZ(l)) return StX;
|
|
if (B_ISXZ(r)) return StX;
|
|
if ((l&0x80) > (r&0x80)) return St1;
|
|
if ((l&0x80) < (r&0x80)) return St0;
|
|
return c;
|
|
}
|
|
|
|
extern vpip_bit_t add_with_carry(vpip_bit_t l, vpip_bit_t r, vpip_bit_t&carry);
|
|
|
|
inline vpip_bit_t B_NOT(vpip_bit_t l)
|
|
{
|
|
if (B_IS0(l)) return St1;
|
|
if (B_IS1(l)) return St0;
|
|
return StX;
|
|
}
|
|
|
|
/*
|
|
* These functions return true if the transition from A to B is a
|
|
* Verilog type of negedge of posedge.
|
|
*/
|
|
extern bool negedge(vpip_bit_t from, vpip_bit_t to);
|
|
extern bool posedge(vpip_bit_t from, vpip_bit_t to);
|
|
|
|
extern ostream& b_output (ostream&os, vpip_bit_t);
|
|
|
|
/*
|
|
* Verilog events (update events and nonblocking assign) are derived
|
|
* from this abstract class so that the simulation engine can treat
|
|
* all of them identically.
|
|
*/
|
|
class vvm_event {
|
|
|
|
public:
|
|
vvm_event();
|
|
virtual ~vvm_event() =0;
|
|
virtual void event_function() =0;
|
|
|
|
void schedule(unsigned long delay =0);
|
|
|
|
private:
|
|
struct vpip_event*event_;
|
|
|
|
static void callback_(void*);
|
|
|
|
private: // not implemented
|
|
vvm_event(const vvm_event&);
|
|
vvm_event& operator= (const vvm_event&);
|
|
};
|
|
|
|
|
|
/*
|
|
* $Log: vvm.h,v $
|
|
* Revision 1.36 2000/04/10 05:26:06 steve
|
|
* All events now use the NetEvent class.
|
|
*
|
|
* Revision 1.35 2000/03/26 16:55:41 steve
|
|
* Remove the vvm_bits_t abstract class.
|
|
*
|
|
* Revision 1.34 2000/03/22 04:26:41 steve
|
|
* Replace the vpip_bit_t with a typedef and
|
|
* define values for all the different bit
|
|
* values, including strengths.
|
|
*
|
|
* Revision 1.33 2000/03/16 19:03:04 steve
|
|
* Revise the VVM backend to use nexus objects so that
|
|
* drivers and resolution functions can be used, and
|
|
* the t-vvm module doesn't need to write a zillion
|
|
* output functions.
|
|
*
|
|
* Revision 1.32 2000/03/13 00:02:34 steve
|
|
* Remove unneeded templates.
|
|
*
|
|
* Revision 1.31 2000/02/23 04:43:43 steve
|
|
* Some compilers do not accept the not symbol.
|
|
*
|
|
* Revision 1.30 2000/02/23 02:56:56 steve
|
|
* Macintosh compilers do not support ident.
|
|
*
|
|
* Revision 1.29 2000/01/08 03:09:14 steve
|
|
* Non-blocking memory writes.
|
|
*/
|
|
#endif
|