46 lines
1.0 KiB
Java
46 lines
1.0 KiB
Java
/*
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* Code formatter project
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* CS 4481
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*/
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package submit.ast;
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import submit.MIPSResult;
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import submit.RegisterAllocator;
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import submit.SymbolTable;
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/**
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*
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* @author edwajohn
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*/
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public class Mutable implements Expression {
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private final String id;
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private final Expression index;
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public Mutable(String id, Expression index) {
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this.id = id;
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this.index = index;
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}
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@Override
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public void toCminus(StringBuilder builder, String prefix) {
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builder.append(id);
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if (index != null) {
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builder.append("[");
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index.toCminus(builder, prefix);
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builder.append("]");
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}
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}
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public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
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SymbolTable symbolTable,
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RegisterAllocator regAllocator) {
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String stackReg = regAllocator.getAny();
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code.append(String.format("li %s %d\n", stackReg, symbolTable.offsetOf(id)))
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.append(String.format("add %s %s $sp\n", stackReg, stackReg));
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return MIPSResult.createAddressResult(stackReg, VarType.INT);
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}
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}
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