123 lines
4.1 KiB
Java
123 lines
4.1 KiB
Java
/*
|
|
* Code formatter project
|
|
* CS 4481
|
|
*/
|
|
package submit.ast;
|
|
|
|
import submit.MIPSResult;
|
|
import submit.RegisterAllocator;
|
|
import submit.SymbolTable;
|
|
|
|
/**
|
|
*
|
|
* @author edwajohn
|
|
*/
|
|
public class BinaryOperator extends AbstractNode implements Expression {
|
|
|
|
private final Expression lhs, rhs;
|
|
private final BinaryOperatorType type;
|
|
|
|
public BinaryOperator(Expression lhs, BinaryOperatorType type,
|
|
Expression rhs) {
|
|
this.lhs = lhs;
|
|
this.type = type;
|
|
this.rhs = rhs;
|
|
}
|
|
|
|
public BinaryOperator(Expression lhs, String type, Expression rhs) {
|
|
this.lhs = lhs;
|
|
this.type = BinaryOperatorType.fromString(type);
|
|
this.rhs = rhs;
|
|
}
|
|
|
|
@Override
|
|
public void toCminus(StringBuilder builder, String prefix) {
|
|
lhs.toCminus(builder, prefix);
|
|
builder.append(" ").append(type).append(" ");
|
|
rhs.toCminus(builder, prefix);
|
|
}
|
|
|
|
@Override
|
|
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
|
|
SymbolTable symbolTable,
|
|
RegisterAllocator regAllocator) {
|
|
MIPSResult left = lhs.toMIPS(code, data, symbolTable, regAllocator);
|
|
String leftRegister =
|
|
regAllocator.getRegisterOrLoadIntoRegister(left, code);
|
|
|
|
MIPSResult right = rhs.toMIPS(code, data, symbolTable, regAllocator);
|
|
String rightRegister =
|
|
regAllocator.getRegisterOrLoadIntoRegister(right, code);
|
|
String resultRegister = regAllocator.getAny();
|
|
|
|
switch (type) {
|
|
case PLUS:
|
|
code.append(String.format("add %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister));
|
|
break;
|
|
case MINUS:
|
|
code.append(String.format("sub %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister));
|
|
break;
|
|
case TIMES:
|
|
code.append(String.format("mult %s %s\n", leftRegister, rightRegister))
|
|
.append(String.format("mflo %s\n", resultRegister));
|
|
break;
|
|
case DIVIDE:
|
|
code.append(String.format("div %s %s\n", leftRegister, rightRegister))
|
|
.append(String.format("mflo %s\n", resultRegister));
|
|
break;
|
|
case MOD:
|
|
code.append(String.format("div %s %s\n", leftRegister, rightRegister))
|
|
.append(String.format("mfhi %s\n", resultRegister));
|
|
break;
|
|
case LT:
|
|
code.append(String.format("slt %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister))
|
|
.append(
|
|
String.format("subi %s %s 1\n", resultRegister, resultRegister));
|
|
break;
|
|
case GT:
|
|
code.append(String.format("slt %s %s %s\n", resultRegister, rightRegister,
|
|
leftRegister))
|
|
.append(
|
|
String.format("subi %s %s 1\n", resultRegister, resultRegister));
|
|
break;
|
|
case LE:
|
|
code.append(String.format("slt %s %s %s\n", resultRegister, rightRegister,
|
|
leftRegister));
|
|
break;
|
|
case GE:
|
|
code.append(String.format("slt %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister));
|
|
break;
|
|
case EQ:
|
|
code.append(String.format("sub %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister));
|
|
break;
|
|
case OR:
|
|
code.append(String.format("or %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister));
|
|
break;
|
|
case AND:
|
|
code.append(String.format("abs %s %s\n", leftRegister, leftRegister))
|
|
.append(String.format("abs %s %s\n", rightRegister, rightRegister))
|
|
.append(String.format("add %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister));
|
|
break;
|
|
case NE:
|
|
code.append(String.format("xor %s %s %s\n", resultRegister, leftRegister,
|
|
rightRegister))
|
|
.append(
|
|
String.format("sltiu %s %s 1\n", resultRegister, resultRegister));
|
|
default:
|
|
break;
|
|
}
|
|
|
|
regAllocator.clear(leftRegister);
|
|
regAllocator.clear(rightRegister);
|
|
|
|
return MIPSResult.createRegisterResult(resultRegister, VarType.INT);
|
|
}
|
|
}
|