@pos = 0 def push_eax puts "push eax" @pos += 4 end def int i puts "push $#{i}" @pos += 4 end def add a, b puts "mov eax, [esp+#{@pos - a}]" puts "add eax, [esp+#{@pos - b}]" push_eax end def ret a puts "mov eax, [esp+#{@pos - a}]" puts "sub esp, #{@pos}" puts "ret" end a = int 3 b = int 5 ret add a, (add a, b)