private static void _binaryArith(Instruction i, LuaVM vm, ArithOp op)
{
var(a, b, c) = i.ABC();
a += 1;
vm.GetRK(b);
vm.GetRK(c);
vm.Arith(op);
vm.Replace(a);
}
private static void _unaryArith(Instruction i, LuaVM vm, ArithOp op)
{
var(a, b, _) = i.ABC();
a += 1;
b += 1;
vm.PushValue(b);
vm.Arith(op);
vm.Replace(a);
}
private static void _unaryArith(Instruction i, LuaVM vm, ArithOp op)
{
var ab_ = i.ABC();
var a = ab_.Item1 + 1;
var b = ab_.Item2 + 1;
vm.PushValue(b);
vm.Arith(op);
vm.Replace(a);
}
internal static void forPrep(Instruction i, ref LuaVM vm)
{
var(a, sBx) = i.AsBx();
a += 1;
vm.PushValue(a);
vm.PushValue(a + 2);
vm.Arith(Consts.LUA_OPSUB);
vm.Replace(a);
vm.AddPC(sBx);
}
internal static void forPrep(Instruction i, ref LuaVM vm)
{
var asBx = i.AsBx();
var a = asBx.Item1 + 1;
var sBx = asBx.Item2;
vm.PushValue(a);
vm.PushValue(a + 2);
vm.Arith(Consts.LUA_OPSUB);
vm.Replace(a);
vm.AddPC(sBx);
}
private static void _binaryArith(Instruction i, LuaVM vm, ArithOp op)
{
var abc = i.ABC();
var a = abc.Item1 + 1;
var b = abc.Item2;
var c = abc.Item3;
vm.GetRK(b);
vm.GetRK(c);
vm.Arith(op);
vm.Replace(a);
}
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);
}
}
