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package condense;
import misc.*;
import cs132.vapor.ast.VFunction;
import cs132.vapor.ast.VMemRef;
import java.util.*;
public class StackHelper {
private int in;
private int out;
private int local;
private int frame_size;
private HashMap<String, String> idx_to_addr;
public StackHelper(VFunction.Stack s) {
this.in = s.in;
this.out = s.out;
this.local = s.local;
this.frame_size = this.stackFrameFormula();
this.idx_to_addr = new HashMap<String,String>();
MinimalLogger.info(String.format("Found in:%d out:%d local%d framesize:%d...",
this.in,
this.out,
this.local,
this.frame_size));
String key;
String value;
int loc;
for (int i = 0; i < this.local; ++i) { // locals
loc = (( -i - 1 ) * 4) - 8;
key = String.format("Local[%d]", i);
value = String.format("%d($fp)", loc);
this.idx_to_addr.put(key, value);
}
for (int i = 0; i < this.out; ++i) { // out
loc = ((this.out + this.local + 2) - i) * -4;
key = String.format("Out[%d]", i);
value = String.format("%d($fp)", loc);
this.idx_to_addr.put(key, value);
}
for (int i = 0; i < this.in; ++i) { // in
loc = i * 4;
key = String.format("In[%d]", i);
value = String.format("%d($fp)", loc);
this.idx_to_addr.put(key, value);
}
MinimalLogger.info(String.format("Mapping: %s", this.idx_to_addr.toString()));
}
public String get(VMemRef.Stack m) {
String key = String.format("%s[%d]",
m.region,
m.index);
MinimalLogger.severe(key);
return this.idx_to_addr.get(key);
}
public int getFrameSize() {
return this.frame_size;
}
private int stackFrameFormula() {
return (this.out + this.local + 2) * 4;
}
}
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