public void Visit(NotEquals m)
{
sw.WriteLine(Tabs() + "// !=");
sw.WriteLine(Tabs() + "param1 = param_stack_pop();");
sw.WriteLine(Tabs() + "param2 = param_stack_pop();");
sw.WriteLine(Tabs() + "param_stack.push(param1 != param2);");
}
/// <summary>
/// compare and push inverse of z flag
/// </summary>
/// <param name="m"></param>
public void Visit(NotEquals m)
{
sw.WriteLine("\t ; building != statement");
/*
* Console.WriteLine("Pop stack into a");
* Console.WriteLine("Pop stack into b");
* Console.WriteLine("compare a,b");
* Console.WriteLine("push ! zero flag onto stack");
*
* Console.WriteLine("Pop stack into a");
*/
PopAndCompare();
// Console.WriteLine("Compare a,b");
sw.WriteLine("\tphp ; flags -> a");
sw.WriteLine("\tpla");
sw.WriteLine("\tlsr a ; put z bit in rightmost place");
sw.WriteLine("\tand #1 ; mask off 0 bit");
sw.WriteLine("\tclc");
sw.WriteLine("\tadc #1 ; flip it");
sw.WriteLine("\tand #1 ; mask off 0 bit (again)");
sw.WriteLine("\tpha ; push result of != ");
// Console.WriteLine("push z flag onto stack");
}
public void Visit(NotEquals m)
{
sw.WriteLine("\tnop ;!=");
sw.WriteLine("\tpop ax");
sw.WriteLine("\tpop bx");
sw.WriteLine("\tcmp ax,bx");
sw.WriteLine("\tpushf");
sw.WriteLine("\tpop ax");
sw.WriteLine("\tnot ax");
sw.WriteLine("\tand ax,64; isolate z flag");
sw.WriteLine("\tmov cx,6");
sw.WriteLine("\tshr ax,cl; z-> position 0");
sw.WriteLine("\tpush ax");
}
public void Visit(NotEquals m)
{
sw.WriteLine("\t;!=");
sw.WriteLine("\tpuls a");
sw.WriteLine("\tsta temp");
sw.WriteLine("\tpuls a");
sw.WriteLine("\tcmpa temp");
sw.WriteLine("\ttfr cc,a");
sw.WriteLine("\tcoma ; flip bits");
sw.WriteLine("\tanda #4 ; isolate z flag");
sw.WriteLine("\tlsra ; z-> position 0");
sw.WriteLine("\tlsra");
sw.WriteLine("\tpshs a");
}
public void Visit(NotEquals m)
{
sw.WriteLine("\t; != statement");
sw.WriteLine("\tpop af");
sw.WriteLine("\tpop bc");
sw.WriteLine("\tcp b");
sw.WriteLine("\t;jr nz,4");
sw.WriteLine("\tdb 20h ; jrnz");
sw.WriteLine("\tdb 4");
sw.WriteLine("\tld a,0");
sw.WriteLine("\t;jr 2");
sw.WriteLine("\tdb 18h; jr");
sw.WriteLine("\tdb 2");
sw.WriteLine("\tld a,1");
sw.WriteLine("\tpush af ");
}
