internal static void getTabUp(Instruction i, ref LuaVM vm)
{
var a_c = i.ABC();
var a = a_c.Item1 + 1;
var c = a_c.Item3;
vm.PushGlobalTable();
vm.GetRK(c);
vm.GetTable(-2);
vm.Replace(a);
vm.Pop(1);
}
internal static void loadNil(Instruction i, ref LuaVM vm)
{
var(a, b) = i.AsBx();
a += 1;
vm.PushNil();
for (var l = a; l <= a + b; l++)
{
vm.Copy(-1, l);
}
vm.Pop(1);
}
static void fixStack(int a, LuaVM vm)
{
int x = (int)vm.ToInteger(-1);
vm.Pop(1);
vm.CheckStack(x - a);
for (int i = a; i < x; i++)
{
vm.PushValue(i);
}
vm.Rotate(vm.RegisterCount() + 1, x - a);
}
internal static void LoadNil(Instruction i, ref LuaVM vm)
{
var(a, b, _) = i.ABC();
a += 1;
vm.PushNil();
for (var j = a; j <= a + b; j++)
{
vm.Copy(-1, j);
}
vm.Pop(1);
}
internal static void loadNil(Instruction i, ref LuaVM vm)
{
var ab_ = i.AsBx();
var a = ab_.Item1 + 1;
var b = ab_.Item2;
vm.PushNil();
for (var l = a; l <= a + b; l++)
{
vm.Copy(-1, l);
}
vm.Pop(1);
}
private static void Compare(Instruction i, ref LuaVM vm, CompareOp op)
{
var(a, b, c) = i.ABC();
vm.GetRK(b);
vm.GetRK(c);
var br = vm.Compare(-2, -1, op) != (a != 0);
if (br)
{
vm.AddPC(1);
}
vm.Pop(2);
}
internal static void _compare(Instruction i, ref LuaVM vm, CompareOp op)
{
var abc = i.ABC();
var a = abc.Item1;
var b = abc.Item2;
var c = abc.Item3;
vm.GetRK(b);
vm.GetRK(c);
if (vm.Compare(-2, -1, op) != (a != 0))
{
vm.AddPC(1);
}
vm.Pop(2);
}
internal static void setList(Instruction i, ref LuaVM vm)
{
var abc = i.ABC();
var a = abc.Item1 + 1;
var b = abc.Item2;
var c = abc.Item3;
if (c > 0)
{
c = c - 1;
}
else
{
c = new Instruction(vm.Fetch()).Ax();
}
var bIsZero = b == 0;
if (bIsZero)
{
b = (int)vm.ToInteger(-1) - a - 1;
vm.Pop(1);
}
vm.CheckStack(1);
var idx = (long)(c * LFIELDS_PER_FLUSH);
for (var j = 1; j <= b; j++)
{
idx++;
vm.PushValue(a + j);
vm.SetI(a, idx);
}
if (bIsZero)
{
for (var j = vm.RegisterCount() + 1; j <= vm.GetTop(); j++)
{
idx++;
vm.PushValue(j);
vm.SetI(a, idx);
}
// clear stack
vm.SetTop(vm.RegisterCount());
}
}
