106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
/*
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* Copyright (c) 2000 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#if !defined(WINNT) && !defined(macintosh)
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#ident "$Id: vvm_force.cc,v 1.3 2000/05/11 23:37:27 steve Exp $"
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#endif
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# include "vvm_gates.h"
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# include <assert.h>
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vvm_force::vvm_force(unsigned w)
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: width_(w)
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{
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force_flag_ = true;
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bits_ = new vpip_bit_t[width_];
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target_ = new vvm_nexus*[width_];
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for (unsigned idx = 0 ; idx < width_ ; idx += 1)
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target_[idx] = 0;
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}
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vvm_force::~vvm_force()
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{
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delete[]bits_;
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delete[]target_;
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}
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void vvm_force::init_I(unsigned key, vpip_bit_t val)
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{
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assert(key < width_);
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bits_[key] = val;
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}
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void vvm_force::take_value(unsigned key, vpip_bit_t val)
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{
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assert(key < width_);
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if (bits_[key] == val)
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return;
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bits_[key] = val;
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if (! target_[key]) return;
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if (force_flag_)
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target_[key]->force_assign(val);
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else
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target_[key]->cassign(val);
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}
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void vvm_force::assign(unsigned key, vvm_nexus*tgt)
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{
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assert(key < width_);
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assert(target_[key] == 0);
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force_flag_ = false;
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target_[key] = tgt;
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target_[key]->cassign_set(this, key);
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target_[key]->cassign(bits_[key]);
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}
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void vvm_force::force(unsigned key, vvm_nexus*tgt)
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{
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assert(key < width_);
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assert(target_[key] == 0);
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force_flag_ = true;
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target_[key] = tgt;
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target_[key]->force_set(this, key);
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target_[key]->force_assign(bits_[key]);
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}
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/*
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* This method is to be called from the vvm_nexus only when it has
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* been told to release me.
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*/
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void vvm_force::release(unsigned key)
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{
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assert(target_[key]);
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target_[key] = 0;
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}
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/*
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* $Log: vvm_force.cc,v $
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* Revision 1.3 2000/05/11 23:37:27 steve
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* Add support for procedural continuous assignment.
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*
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* Revision 1.2 2000/04/23 03:45:25 steve
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* Add support for the procedural release statement.
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*
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* Revision 1.1 2000/04/22 04:20:20 steve
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* Add support for force assignment.
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*
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*/
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