public override int GenerateCode(int loc, IVirtualMachine vm, CheckerInformation info)
{
int conditionLoc = loc;
loc = Condition.GenerateCode(loc, vm, info);
int condJumpLoc = loc++; //Placeholder for conditonal jump out of while loop
foreach (ASTCpsCmd cmd in Commands)
{
loc = cmd.GenerateCode(loc, vm, info);
}
vm.UncondJump(loc++, conditionLoc);
//Fill in placeholder
vm.CondJump(condJumpLoc, loc);
return(loc);
}
public override int GenerateCode(int loc, IVirtualMachine vm, CheckerInformation info)
{
loc = Condition.GenerateCode(loc, vm, info);
int condJumpLoc = loc++; //Placeholder
foreach (ASTCpsCmd cmd in TrueCommands)
{
loc = cmd.GenerateCode(loc, vm, info);
}
int uncondJumpLoc = loc++; //Placeholder2
vm.CondJump(condJumpLoc, loc); //Fill in Placeholder
foreach (ASTCpsCmd cmd in FalseCommands)
{
loc = cmd.GenerateCode(loc, vm, info);
}
vm.UncondJump(uncondJumpLoc, loc); //Fill in Placeholder2
return(loc);
}
/*
* program intDiv
* global
* proc divide(in copy m:int, in copy n:int, out ref q:int, out ref r:int)
* do
* q init := 0;
* r init := m;
* while r >= n do
* q := q + 1;
* r := r - n
* endwhile
* endproc;
*
* var m:int;
* var n:int;
* var q:int;
* var r:int
* do
* ? m init;
* ? n init;
* call divide(m, n, q init, r init);
* ! q;
* ! r
* endprogram
*/
public static void Test()
{
try {
vm.Alloc(0, 4);
vm.IntLoad(1, 0);
vm.IntInput(2, "m");
vm.IntLoad(3, 1);
vm.IntInput(4, "n");
vm.Alloc(5, 0);
vm.IntLoad(6, 0);
vm.Deref(7);
vm.IntLoad(8, 1);
vm.Deref(9);
vm.IntLoad(10, 2);
vm.IntLoad(11, 3);
vm.Call(12, 20);
vm.IntLoad(13, 2);
vm.Deref(14);
vm.IntOutput(15, "q");
vm.IntLoad(16, 3);
vm.Deref(17);
vm.IntOutput(18, "r");
vm.Stop(19);
vm.Enter(20, 0, 0);
vm.IntLoad(21, 0);
vm.LoadRel(22, (-2));
vm.Deref(23);
vm.Store(24);
vm.LoadRel(25, (-4));
vm.Deref(26);
vm.LoadRel(27, (-1));
vm.Deref(28);
vm.Store(29);
vm.LoadRel(30, (-1));
vm.Deref(31);
vm.Deref(32);
vm.LoadRel(33, (-3));
vm.Deref(34);
vm.IntGE(35);
vm.CondJump(36, 55);
vm.LoadRel(37, (-2));
vm.Deref(38);
vm.Deref(39);
vm.IntLoad(40, 1);
vm.IntAdd(41);
vm.LoadRel(42, (-2));
vm.Deref(43);
vm.Store(44);
vm.LoadRel(45, (-1));
vm.Deref(46);
vm.Deref(47);
vm.LoadRel(48, (-3));
vm.Deref(49);
vm.IntSub(50);
vm.LoadRel(51, (-1));
vm.Deref(52);
vm.Store(53);
vm.UncondJump(54, 30);
vm.Return(55, 4);
} catch (IVirtualMachine.CodeTooSmallError e) {
Console.WriteLine(e.ToString());
return;
}
try {
vm.Execute();
} catch (IVirtualMachine.ExecutionError e) {
Console.WriteLine(e.ToString());
return;
}
}