private IEnumerable <string> ProcessCall(Vmcmd vmcmd, Idgen idgen, string stFunc)
{
var lblNext = idgen.Id("after_call");
yield return("//r14: hány argumentum van a veremben");
yield return("//r15: hova kell ugrani");
yield return("//D: hova kell visszatérni");
if (vmcmd.I == 0)
{
yield return("@R14");
yield return("M=0");
}
else if (vmcmd.I == 1)
{
yield return("@R14");
yield return("M=1");
}
else
{
yield return("@" + vmcmd.I);
yield return("D=A");
yield return("@R14");
yield return("M=D");
}
yield return("@" + idgen.Fun(vmcmd.StFn));
yield return("D=A");
yield return("@R15");
yield return("M=D");
yield return("@" + lblNext);
yield return("D=A");
yield return("@" + lblFunCall);
yield return("D;JMP");
yield return("(" + lblNext + ")");
}
private static IEnumerable <string> ProcessFunction(Vmcmd vmcmd, Idgen idgen, string stFunc)
{
yield return("(" + idgen.Fun(vmcmd.StFn) + ")");
for (int k = 0; k < vmcmd.I; k++)
{
yield return("//push 0");
yield return("@SP");
yield return("AM=M+1");
yield return("A=A-1");
yield return("M=0");
}
}