public void genArithmeticExpression(ArithmeticExprNode expr)
{
genExpression(expr.lhs);
genExpression(expr.rhs);
assembly.addLine("pop ebx"); //rhs --> ebx
assembly.addLine("pop eax"); //lhs --> eax
switch (expr.op)
{
case ArithmeticExprNode.OPERATOR.ADD:
assembly.addLine("add eax,ebx");
break;
case ArithmeticExprNode.OPERATOR.SUB:
assembly.addLine("sub eax,ebx");
break;
case ArithmeticExprNode.OPERATOR.MULT:
assembly.addLine("mul eax,ebx");
break;
case ArithmeticExprNode.OPERATOR.DIV:
assembly.addLine("div eax,ebx");
break;
case ArithmeticExprNode.OPERATOR.MOD:
assembly.addLine("div eax, ebx");
assembly.addLine("mov eax, edx"); //remainder is in edx
break;
case ArithmeticExprNode.OPERATOR.PLUS:
break;
case ArithmeticExprNode.OPERATOR.MINUS:
break;
case ArithmeticExprNode.OPERATOR.INC:
assembly.addLine("inc eax");
break;
case ArithmeticExprNode.OPERATOR.DEC:
assembly.addLine("dec eax");
break;
default:
break;
}
assembly.addLine("push eax"); //result --> stack
}
public ArithmeticExprNode makeModuloExprNode(ExprNode lhs, ExprNode rhs)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.MOD, lhs, rhs);
return(node);
}
public ArithmeticExprNode makeMultiplyExprNode(ExprNode lhs, ExprNode rhs)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.MULT, lhs, rhs);
return(node);
}
public ArithmeticExprNode makeDivideExprNode(ExprNode lhs, ExprNode rhs)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.DIV, lhs, rhs);
return(node);
}
public ArithmeticExprNode makeSubtractExprNode(ExprNode lhs, ExprNode rhs)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.SUB, lhs, rhs);
return(node);
}
public ArithmeticExprNode makeAdditionExprNode(ExprNode lhs, ExprNode rhs)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.ADD, lhs, rhs);
return(node);
}
public ArithmeticExprNode makePostMinusMinusExprNode(ExprNode term)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.DEC, term, null);
return(node);
}
public ArithmeticExprNode makePrePlusPlusExprNode(ExprNode term)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.INC, null, term);
return(node);
}
public ArithmeticExprNode makeUnaryMinusExprNode(ExprNode term)
{
ArithmeticExprNode node = new ArithmeticExprNode(ArithmeticExprNode.OPERATOR.MINUS, term, null);
return(node);
}
