public void Accept(CIL_Function function)
{
var scope = new Scope {
father = CurrentScope
};
CurrentScope = scope;
// Las funciones van a recivir los parametros a partir de la
// tercera posicion del stack (-12($sp)), en las dos primeras
// van ra (-4($sp)) y fp (-8($sp))
// Despues de los Args van los Locals
scope.VarInStack["void"] = 0;
scope.VarInStack["this"] = -12;
int i = -16;
foreach (var arg in function.Args)
{
scope.VarInStack[arg] = i;
i -= 4;
}
foreach (var local in function.Locals)
{
scope.VarInStack[local] = i;
i -= 4;
}
int n = 4 * (function.Args.Count + function.Locals.Count + 2);
Text += function.Name + ":\n";
Text += "\t sw $zero, 0($sp) \n" +
"\t sw $ra, -4($sp) \n" +
"\t sw $fp, -8($sp) \n" +
"\t subu $sp, $sp, " + n + "\n" +
"\t addu $fp, $sp, " + n + "\n";
foreach (var inst in function.Instructions)
{
inst.Accept(this);
}
Text += "\t lw $ra, -4($fp) \n" +
"\t lw $fp, -8($fp) \n" +
"\t addu $sp, $sp, " + n + "\n" +
"\t j $ra \n" +
"#########################################################################\n";
CurrentScope = CurrentScope.father;
}
public void AddFunc(CIL_Function func)
{
Funcs.Add(func);
}
