/// <summary>
/// R(A), R(A + 1), ..., R(A + B) = nil
/// </summary>
public static void LoadNil(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out _);
a += 1;
vm.PushNil();
for (var j = a; j <= a + b; j++)
{
vm.Copy(-1, j);
}
vm.Pop(1);
}
private static void Compare(Instruction i, ILuaVM vm, CompareOp op)
{
var(a, b, c) = i.ABC();
vm.GetRK(b);
vm.GetRK(c);
if (vm.Compare(-2, -1, op) != (a != 0))
{
vm.AddPC(1);
}
vm.Pop(2);
}
internal static void LoadNil(Instruction i, ILuaVM vm)
{
var(a, b, _) = i.ABC();
a += 1;
vm.PushNil();
for (int j = a; j <= a + b; j++)
{
vm.Copy(-1, j);
}
vm.Pop(1);
}
public static void LoadNil(int i, ILuaVM vm)
{
int a = Instruction.GetA(i) + 1;
int b = Instruction.GetB(i);
vm.PushNil();
for (int j = a; j <= a + b; j++)
{
vm.Copy(-1, j);
}
vm.Pop(1);
}
private static void FixStack(int a, ILuaVM vm)
{
var x = (int)vm.ToInteger(-1);
vm.Pop(1);
vm.CheckStack(x - a);
for (var i = a; i < x; i++)
{
vm.PushValue(i);
}
vm.Rotate(vm.RegisterCount() + 1, x - a);
}
/// <summary>
/// if ((RK(B) op RK(C)) != A)
/// pc++
/// </summary>
private static void Compare(Instruction ins, ILuaVM vm, ECompOp op)
{
ins.ABC(out var a, out var b, out var c);
vm.GetRK(b);
vm.GetRK(c);
if (vm.Compare(-2, -1, op) != (a != 0))
{
vm.AddPC(1);
}
vm.Pop(2);
}
public static void SetList(Instruction i, ILuaVM vm)
{
const int FIELDS_PER_FLUSH = 50;
var(a, b, c) = i.ABC();
a += 1;
bool bIsZero = b == 0;
if (bIsZero)
{
b = (int)vm.ToInteger(-1) - a - 1;
vm.Pop(1);
}
if (c > 0)
{
c -= 1;
}
else
{
c = ((Instruction)vm.Fetch()).Ax();
}
Int64 idx = (Int64)(c * FIELDS_PER_FLUSH);
for (int j = 1; j <= b; j++)
{
idx++;
vm.PushValue(a + j);
vm.SetI(a, idx);
}
if (bIsZero)
{
for (int j = vm.RegisterCount() + 1; j <= vm.GetTop(); j++)
{
idx++;
vm.PushValue(j);
vm.SetI(a, idx);
}
vm.SetTop(vm.RegisterCount());
}
}
/// <summary>
/// R(A)[(C - 1) * FPF + i] := R(A + i), 1 <= i <= B
/// </summary>
public static void SetList(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out var c);
a += 1;
if (c > 0)
{
c--;
}
else
{
new Instruction(vm.Fetch()).Ax(out c);
}
var bIsZero = b == 0;
if (bIsZero)
{
b = (int)vm.ToInteger(-1) - a - 1;
vm.Pop(1);
}
vm.CheckStack(1);
var idx = (LuaInt)(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);
}
vm.SetTop(vm.RegisterCount());
}
}