public void Visit(GreaterThanEquals m)
{
/* Console.WriteLine("pop stack into a");
* Console.WriteLine("pop stack into b");
* Console.WriteLine("push a 1 if carry flag or z flag set");
*/
sw.WriteLine("\t;building a >= operation");
PopAndCompare();
//carry flag is not set or the
//zero flag is set
//zc
//00 - less than
//11 - equal
//01 - gte
//need to determine that carry flag is 0
sw.WriteLine("\tphp ; flags -> a");
sw.WriteLine("\tpla");
sw.WriteLine("\tand #1 ; isolate c for >=");
// sw.WriteLine("\tcmp #0 ; test");
// sw.WriteLine("\tphp ; flags -> a");
// sw.WriteLine("\tpla");
// sw.WriteLine("\tand #1 ; mask it");
sw.WriteLine("\tpha ; push result of gte (carry == 1)");
}
public void Visit(GreaterThanEquals m)
{
//push a 1 if c == 0
sw.WriteLine(Tabs() + "//a >= b");
sw.WriteLine(Tabs() + "param2 = param_stack_pop();");
sw.WriteLine(Tabs() + "param1 = param_stack_pop();");
sw.WriteLine(Tabs() + "param_stack.push(param1 >= param2);");
}
public void Visit(GreaterThanEquals m)
{
//push a 1 if c == 0
sw.WriteLine("\tnop ;a >= b");
sw.WriteLine("\tpop bx");
sw.WriteLine("\tpop ax");
sw.WriteLine("\tcmp ax,bx");
sw.WriteLine("\tcmc ; flip bits");
sw.WriteLine("\tpushf");
sw.WriteLine("\tpop ax");
sw.WriteLine("\tand ax,1 ; isolate c");
sw.WriteLine("\tpush ax");
}
public void Visit(GreaterThanEquals m)
{
//push a 1 if c == 0
sw.WriteLine("\t;a >= b");
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 #1 ; isolate c");
sw.WriteLine("\tpshs a");
}
public void Visit(GreaterThanEquals m)
{
//push a 0 if carry = 1
sw.WriteLine("\t; a >= b");
sw.WriteLine("\tpop bc");
sw.WriteLine("\tpop af");
sw.WriteLine("\tcp b");
sw.WriteLine("\tdb 28h ; jr z,8 - skip to load 1");
sw.WriteLine("\tdb 8h ; ");
sw.WriteLine("\tdb 30h ; jr cc,6 ; skip to load 1");
sw.WriteLine("\tdb 6; ");
sw.WriteLine("\tld a,0");
sw.WriteLine("\tdb 18h ; jr ; jump to push af");
sw.WriteLine("\tdb 4");
sw.WriteLine("\tld a,1");
sw.WriteLine("\tpush af");
}
