Loop coding

gistfile1.txt

Making the hot path (in this case, no match) fall-through:

--- before ---

  mov up,down
  mov up,down
  # check 4
l:mov up,acc
  sub 4
  jez z
  mov 0,right
  jmp t
z:mov 1,right
t:add 4
  mov acc,down
  jmp l
  
  
--- after ---

  mov up,down
  mov up,down
  jmp l
  # check 4
f:mov 0,right
t:add 4
  mov acc,down
l:mov up,acc
  sub 4
  jnz f
  mov 1,right
  jmp t