local registers = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
local r = registers
for _,path in pairs({...}) do
  local file = io.open(path)
  if not file then error("Could not open: "..path) end
  local content = file:read("*a")
  local index = 1
  local instructions = {
    ["add (%d+) (%d+) (%d+)"] = function(d,a,b) r[d + 1] = r[a + 1] + r[b + 1] end,
    ["sub (%d+) (%d+) (%d+)"] = function(d,a,b) r[d + 1] = r[a + 1] - r[b + 1] end,
    ["mul (%d+) (%d+) (%d+)"] = function(d,a,b) r[d + 1] = r[a + 1] * r[b + 1] end,
    ["shl (%d+) (%d+)"] = function(d,a,b) r[d + 1] = r[d + 1] << r[a + 1] end,
    ["shr (%d+) (%d+)"] = function(d,a,b) r[d + 1] = r[d + 1] >> r[a + 1] end,
    ["bor (%d+) (%d+)"] = function(d,a,b) r[d + 1] = r[a + 1] | r[b + 1] end,
    ["band (%d+) (%d+)"] = function(d,a,b) r[d + 1] = r[a + 1] & r[b + 1] end,
    ["li (%d+) (%d+)"] = function(d,i) r[d + 1] = i end,
    ["jz (%d+) (%d+)"] = function(d,a,i) if r[a + 1] == 0 then index = index + r[i + 1] - 1 end end,
    ["jp (%d+) (%d+)"] = function(d,a,i) if r[a + 1] > 0 then index = index + r[i + 1] - 1 end end,
    ["TELL (%d+)"] = function(r) print("    ",registers[r]) end, -- DEBUGGING, NOT IN FUNNYCORE!!!
    ["PUT (.+)"] = function(r) end,
    ["HALT"] = function(r) index = -1 end
  }
  local lines = {}
  for line in content:gmatch("[^\n\r]+") do table.insert(lines,line) end
  local function execute_instruction(line)
    for pattern,callback in pairs(instructions) do
      local result = {}
      for index,item in pairs({line:match(pattern)}) do
        table.insert(result,tonumber(item))
      end
      if #result ~= 0 then
        callback(table.unpack(result))
      end
    end
  end
  while lines[index] do
    print(lines[index],string.format("R{%s}",table.concat(registers,",")))
    execute_instruction(lines[index])
    index = index + 1
  end 
end