public void Emit(CompilationContext context)
{
context.EmitComment(";Multiplicative expression");
((ICodeEmitter)Tokens[0]).Emit(context);
var t1ExpressionType = ((IHasType)Tokens[0]).GetExpressionType(context);
if (Tokens.Count > 1)
{
TypeChecking.CheckExpressionTypeIsNumeric(t1ExpressionType);
}
for (int i = 1; i < Tokens.Count; i += 2)
{
((ICodeEmitter)Tokens[i + 1]).Emit(context);
var t2ExpressionType = ((IHasType)Tokens[i + 1]).GetExpressionType(context);
TypeChecking.CheckExpressionTypeIsNumeric(t2ExpressionType);
TypeChecking.CheckExpressionTypesMatch(t1ExpressionType, t2ExpressionType);
t1ExpressionType = t2ExpressionType;
string op = ((DefaultLanguageTerminalToken)Tokens[i]).Value;
context.EmitInstruction(new IRPop()
{
To = "ebx"
});
context.EmitInstruction(new IRPop()
{
To = "eax"
});
switch (op)
{
case "*":
context.EmitInstruction(new IRMult()
{
Left = "eax", Right = "ebx", To = "ecx"
});
break;
case "/":
context.EmitInstruction(new IRDiv()
{
Left = "eax", Right = "ebx", To = "ecx"
});
break;
}
context.EmitInstruction(new IRPushRegister()
{
From = "ecx"
});
}
}
public void Emit(CompilationContext context)
{
context.EmitComment(";Bitwise expression");
((ICodeEmitter)Tokens[0]).Emit(context);
var expressionType = ((IHasType)Tokens[0]).GetExpressionType(context);
if (Tokens.Count > 1)
{
TypeChecking.CheckExpressionTypeIsNumeric(expressionType);
}
for (int i = 1; i < Tokens.Count; i += 2)
{
string op = ((DefaultLanguageTerminalToken)Tokens[i]).Value;
((ICodeEmitter)Tokens[i + 1]).Emit(context);
expressionType = ((IHasType)Tokens[i + 1]).GetExpressionType(context);
TypeChecking.CheckExpressionTypeIsNumeric(expressionType);
context.EmitInstruction(new IRPop()
{
To = "ebx"
});
context.EmitInstruction(new IRPop()
{
To = "eax"
});
switch (op)
{
case "&":
context.EmitInstruction(new IRAnd()
{
Left = "eax", Right = "ebx", To = "ecx"
});
break;
case "|":
context.EmitInstruction(new IROr()
{
Left = "eax", Right = "ebx", To = "ecx"
});
break;
case "^":
context.EmitInstruction(new IRXOr()
{
Left = "eax", Right = "ebx", To = "ecx"
});
break;
}
context.EmitInstruction(new IRPushRegister()
{
From = "ecx"
});
}
}
