70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
/*
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* File: StateCalculator.cpp
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* Author: Christopher
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*
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* Created on December 12, 2013, 8:29 PM
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*/
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#include "StateCalculator.h"
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#include "Circuit.h"
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#include "trans.h"
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/*
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* Recalculate segment states (on/off), based on the fact that the segments
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* in segs have just changed state. Keep track of which other segments are
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* affected, and repeat the process on those segments. Repeat until no more
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* segments change state.
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*/
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#define SANE (100)
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void StateCalculator::recalc(const SegmentSet& segs) {
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int sanity(0);
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SegmentSet changed(segs);
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while (!changed.empty()) {
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if (++sanity >= SANE) {
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throw "ERROR: reached maximum iteration limit while recalculating CPU state";
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}
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StateCalculator c;
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for (auto s : changed) {
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c.recalcNode(s);
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}
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changed = c.segs;
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}
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}
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/*
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* Gets group of segments currently electrically connected to seg,
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* gets what their group value is (or should be), goes through all
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* those segments and sets their "on" value. For all connected gates,
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* turn on/off, and indicate that the segments connected to those
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* transistors' source and drain legs have changed, by adding them
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* to this->segs.
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*/
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void StateCalculator::recalcNode(Segment* seg) {
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if (!(seg->vss || seg->vcc)) {
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Circuit c(seg);
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for (auto s : c) {
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setSeg(s, c.getValue());
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}
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}
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}
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void StateCalculator::setSeg(Segment* s, const bool on) {
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if (s->on != on) {
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s->on = on;
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for (auto t : s->gates) {
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setTrans(t, on);
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}
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}
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}
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void StateCalculator::setTrans(Trans* t, const bool on) {
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if (t->on != on) {
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t->on = on;
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this->segs.insert(t->c1);
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this->segs.insert(t->c2);
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}
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}
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