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/*
* Copyright (c) 1999 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: PDelays.cc,v 1.1 2000/12/21 21:57:12 jrandrews Exp $"
#endif
# include "PDelays.h"
# include "PExpr.h"
# include "verinum.h"
PDelays::PDelays()
{
for (unsigned idx = 0 ; idx < 3 ; idx += 1)
delay_[idx] = 0;
}
PDelays::~PDelays()
{
for (unsigned idx = 0 ; idx < 3 ; idx += 1)
delete delay_[idx];
}
void PDelays::set_delay(PExpr*del)
{
assert(del);
assert(delay_[0] == 0);
delay_[0] = del;
}
void PDelays::set_delays(const svector<PExpr*>*del)
{
assert(del);
assert(del->count() <= 3);
for (unsigned idx = 0 ; idx < del->count() ; idx += 1)
delay_[idx] = (*del)[idx];
}
void PDelays::eval_delays(Design*des, const string&path,
unsigned long&rise_time,
unsigned long&fall_time,
unsigned long&decay_time) const
{
verinum*dv;
if (delay_[0]) {
dv = delay_[0]->eval_const(des, path);
assert(dv);
rise_time = dv->as_ulong();
delete dv;
if (delay_[1]) {
dv = delay_[1]->eval_const(des, path);
assert(dv);
fall_time = dv->as_ulong();
delete dv;
if (delay_[2]) {
dv = delay_[2]->eval_const(des, path);
assert(dv);
decay_time = dv->as_ulong();
delete dv;
} else {
if (rise_time < fall_time)
decay_time = rise_time;
else
decay_time = fall_time;
}
} else {
assert(delay_[2] == 0);
fall_time = rise_time;
decay_time = rise_time;
}
} else {
rise_time = 0;
fall_time = 0;
decay_time = 0;
}
}
/*
* $Log: PDelays.cc,v $
* Revision 1.1 2000/12/21 21:57:12 jrandrews
* initial import
*
* Revision 1.2 2000/02/23 02:56:53 steve
* Macintosh compilers do not support ident.
*
* Revision 1.1 1999/09/04 19:11:46 steve
* Add support for delayed non-blocking assignments.
*
*/