internal static void Move(Instruction i, ref LuaVM vm)
{
var(a, b, _) = i.ABC();
a += 1;
b += 1;
vm.Copy(b, a);
}
internal static void move(Instruction i, ref LuaVM vm)
{
var ab_ = i.ABC();
var a = ab_.Item1 + 1;
var b = ab_.Item2 + 1;
vm.Copy(b, a);
}
internal static void getUpval(Instruction i, ref LuaVM vm)
{
var(a, b, _) = i.ABC();
a += 1;
b += 1;
vm.Copy(LuaVM.LuaUpvalueIndex(b), a);
}
// if R(A+1) ~= nil then {
// R(A)=R(A+1); pc += sBx
// }
internal static void TForLoop(Instruction i, ref LuaVM vm)
{
var(a, sBx) = i.AsBx();
a += 1;
if (!vm.IsNil(a + 1))
{
vm.Copy(a + 1, a);
vm.AddPC(sBx);
}
}
// R(A+1) := R(B); R(A) := R(B)[RK(C)]
internal static void Self(Instruction i, ref LuaVM vm)
{
var(a, b, c) = i.ABC();
a += 1;
b += 1;
vm.Copy(b, a + 1);
vm.GetRK(c);
vm.GetTable(b);
vm.Replace(a);
}
// R(A+1) := R(B); R(A) := R(B)[RK(C)]
internal static void self(Instruction i, ref LuaVM vm)
{
var abc = i.ABC();
var a = abc.Item1 + 1;
var b = abc.Item2 + 1;
var c = abc.Item3;
vm.Copy(b, a + 1);
vm.GetRK(c);
vm.GetTable(b);
vm.Replace(a);
}
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);
}
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);
}
internal static void testSet(Instruction i, ref LuaVM vm)
{
var abc = i.ABC();
var a = abc.Item1 + 1;
var b = abc.Item2 + 1;
var c = abc.Item3 + 1;
if (vm.ToBoolean(b) == (c != 0))
{
vm.Copy(b, a);
}
else
{
vm.AddPC(1);
}
}
internal static void TestSet(Instruction i, ref LuaVM vm)
{
var(a, b, c) = i.ABC();
a += 1;
b += 1;
c += 1;
if (vm.ToBoolean(b) == (c != 0))
{
vm.Copy(b, a);
}
else
{
vm.AddPC(1);
}
}
internal static void ForLoop(Instruction i, ref LuaVM vm)
{
var(a, sBx) = i.AsBx();
a += 1;
// R(A)+=R(A+2);
vm.PushValue(a + 2);
vm.PushValue(a);
vm.Arith(Constant.LUA_OPADD);
vm.Replace(a);
var isPositiveStep = vm.ToNumber(a + 2) >= 0;
if (
(isPositiveStep && vm.Compare(a, a + 1, Constant.LUA_OPLE)) ||
(!isPositiveStep && vm.Compare(a + 1, a, Constant.LUA_OPLE)))
{
// pc+=sBx; R(A+3)=R(A)
vm.AddPC(sBx);
vm.Copy(a, a + 3);
}
}
