/// <summary>
/// R(A) -= R(A + 2)
/// pc += sBx
/// </summary>
public static void ForPrep(Instruction ins, ILuaVM vm)
{
ins.AsBx(out var a, out var sbx);
a += 1;
if (vm.Type(a) == ELuaType.String)
{
vm.PushNumber(vm.ToNumber(a));
vm.Replace(a);
}
if (vm.Type(a + 1) == ELuaType.String)
{
vm.PushNumber(vm.ToNumber(a + 1));
vm.Replace(a + 1);
}
if (vm.Type(a + 2) == ELuaType.String)
{
vm.PushNumber(vm.ToNumber(a + 2));
vm.Replace(a + 2);
}
// R(A) -= R(A + 2)
vm.PushValue(a);
vm.PushValue(a + 2);
vm.Arith(EArithOp.Sub);
vm.Replace(a);
// pc += sBx
vm.AddPC(sbx);
}
/// <summary>
/// UpValue[B] = R(A)
/// </summary>
public static void SetUpval(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out _);
a += 1;
b += 1;
vm.Copy(a, vm.LuaUpvalueIndex(b));
}
internal static void LoadK(Instruction i, ILuaVM vm)
{
var(a, bx) = i.ABx();
a += 1;
vm.GetConst(bx);
vm.Replace(a);
}
/// <summary>
/// R(A) = R(B)
/// </summary>
public static void Move(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out _);
a += 1;
b += 1;
vm.Copy(b, a);
}
public static void Move(int i, ILuaVM vm)
{
int a = Instruction.GetA(i) + 1;
int b = Instruction.GetB(i) + 1;
vm.Copy(b, a);
}
//R(A) := {} (size = B,C)
public static void NewTable(int i, ILuaVM vm)
{
int a = Instruction.GetA(i) + 1;
int b = Instruction.GetB(i) + 1;
int c = Instruction.GetC(i);
vm.GetRK(c);
}
public static void LoadKx(int i, ILuaVM vm)
{
int a = Instruction.GetA(i) + 1;
int ax = Instruction.GetAx(vm.Fetch());
vm.GetConst(ax);
vm.Replace(a);
}
public static void LoadK(int i, ILuaVM vm)
{
int a = Instruction.GetA(i) + 1;
int bx = Instruction.GetBx(i);
vm.GetConst(bx);
vm.Replace(a);
}
/// <summary>
/// R(A) = Kst(extra arg)
/// </summary>
public static void LoadKx(Instruction ins, ILuaVM vm)
{
ins.ABx(out var a, out _);
a += 1;
new Instruction(vm.Fetch()).Ax(out var ax);
vm.GetConst(ax);
vm.Replace(a);
}
/// <summary>
/// R(A) = {} (size = B, C)
/// </summary>
public static void NewTable(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out var c);
a += 1;
vm.CreateTable(Fpb.Fb2Int(b), Fpb.Fb2Int(c));
vm.Replace(a);
}
internal static void GetUpval(Instruction i, ILuaVM vm)
{
var(a, b, _) = i.ABC();
a += 1;
b += 1;
vm.Copy(LuaState.LuaUpvalueIndex(b), a);
}
/// <summary>
/// UpValue[A][RK(B)] = RK(C)
/// </summary>
public static void SetTabUp(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out var c);
a += 1;
vm.GetRK(b);
vm.GetRK(c);
vm.SetTable(vm.LuaUpvalueIndex(a));
}
public void Execute(ILuaVM luaVM)
{
var action = OpCodes.Codes[(int)Opcode()].Action;
if (!(action is null))
{
action(this, luaVM);
}
/// <summary>
/// R(A + 3, ..., R(A + 2 + C) = R(A)(R(A + 1), R(A + 2))
/// </summary>
public static void TForCall(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out _, out var c);
a += 1;
PushFuncAndArgs(a, 3, vm);
vm.Call(2, c);
PopResults(a + 3, c + 1, vm);
}
/// <summary>
/// R(A) = closure(KPROTO[Bx])
/// </summary>
public static void Closure(Instruction ins, ILuaVM vm)
{
ins.ABx(out var a, out var bx);
a += 1;
vm.LoadProto(bx);
vm.Replace(a);
}
internal static void NewTable(Instruction i, ILuaVM vm)
{
var(a, b, c) = i.ABC();
a += 1;
vm.CreateTable(Fb2int(b), Fb2int(c));
vm.Replace(a);
}
//(iBx) R(A) := closure(KPROTO[Bx])
public static void Closure(int i, ILuaVM vm)
{
int a = Instruction.GetA(i);
int bx = Instruction.GetBx(i);
vm.LoadProto(bx);
vm.Replace(a);
}
internal static void Closure(Instruction i, ILuaVM vm)
{
var(a, bx) = i.ABx();
a += 1;
vm.LoadProto(bx);
vm.Replace(a);
}
/// <summary>
/// R(A) = Kst(Bx)
/// </summary>
public static void LoadK(Instruction ins, ILuaVM vm)
{
ins.ABx(out var a, out var bx);
a += 1;
vm.GetConst(bx);
vm.Replace(a);
}
public static void SetTable(Instruction i, ILuaVM vm)
{
var(a, b, c) = i.ABC();
a += 1;
vm.GetRK(b);
vm.GetRK(c);
vm.SetTable(a);
}
internal static void Not(Instruction i, ILuaVM vm)
{
var(a, b, _) = i.ABC();
a += 1;
b += 1;
vm.PushBoolean(!vm.ToBoolean(b));
vm.Replace(a);
}
internal static void TForCall(Instruction i, ILuaVM vm)
{
var(a, _, c) = i.ABC();
a += 1;
PushFuncAndArgs(a, 3, vm);
vm.Call(2, c);
PopResults(a + 3, c + 1, vm);
}
private static void unaryArith(int i, ILuaVM vm, ArithOpEnum op)
{
int a = Instruction.GetA(i) + 1;
int b = Instruction.GetB(i) + 1;
vm.PushValue(b);
vm.Arith(op);
vm.Replace(a);
}
internal static void SetTabUp(Instruction i, ILuaVM vm)
{
var(a, b, c) = i.ABC();
a += 1;
vm.GetRK(b);
vm.GetRK(c);
vm.SetTable(LuaState.LuaUpvalueIndex(a));
}
internal static void LoadKx(Instruction i, ILuaVM vm)
{
var(a, _) = i.ABx();
a += 1;
int ax = ((Instruction)vm.Fetch()).Ax();
vm.GetConst(ax);
vm.Replace(a);
}
/// <summary>
/// R(A)[RK(B)] = RK(C)
/// </summary>
public static void SetTable(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out var c);
a += 1;
vm.GetRK(b);
vm.GetRK(c);
vm.SetTable(a);
}
internal static void Len(Instruction i, ILuaVM vm)
{
var(a, b, _) = i.ABC();
a += 1;
b += 1;
vm.Len(b);
vm.Replace(a);
}
/// <summary>
/// if R(A + 1) != null
/// R(A) = R(A + 1); pc += sBx
/// </summary>
public static void TForLoop(Instruction ins, ILuaVM vm)
{
ins.AsBx(out var a, out var sbx);
a += 1;
if (!vm.IsNil(a + 1))
{
vm.Copy(a + 1, a);
vm.AddPC(sbx);
}
}
internal static void Call(Instruction i, ILuaVM vm)
{
var(a, b, c) = i.ABC();
a += 1;
int nArgs = PushFuncAndArgs(a, b, vm);
vm.Call(nArgs, c - 1);
PopResults(a, c, vm);
}
/// <summary>
/// R(A), ..., R(A + C - 2) = R(A)(R(A + 1), ..., R(A + B - 1))
/// </summary>
public static void Call(Instruction ins, ILuaVM vm)
{
ins.ABC(out var a, out var b, out var c);
a += 1;
var nArgs = PushFuncAndArgs(a, b, vm);
vm.Call(nArgs, c - 1);
PopResults(a, c, vm);
}
