anchor.diff:    (sys.lap-x86:mov64 :rax :r8)
     (sys.lap-x86:mov64 :rdi :r9)
     (sys.lap-x86:mov64 :rcx :r10)
  -  (sys.lap-x86:sar64 :rdi 3)
  -  (sys.lap-x86:sar64 :rsi 3)
  +  (sys.lap-x86:sar64 :rax 3)
  +  (sys.lap-x86:sar64 :rdi 3)
     (sys.lap-x86:sar64 :rcx 3)
     (sys.lap-x86:rep)
     (sys.lap-x86:stos32)
  
positive.code:   (sys.lap-x86:mov64 :rax :r8)
    (sys.lap-x86:mov64 :rdi :r9)
    (sys.lap-x86:mov64 :rcx :r10)
    (sys.lap-x86:sar64 :rdi 3)
    (sys.lap-x86:sar64 :rsi 3)
    (sys.lap-x86:sar64 :rcx 3)
    (sys.lap-x86:rep)
    (sys.lap-x86:stos64)
  
negative.code:   (sys.lap-x86:mov64 :rax :r8)
    (sys.lap-x86:mov64 :rdi :r9)
    (sys.lap-x86:mov64 :rcx :r10)
    (sys.lap-x86:sar64 :rax 3)
    (sys.lap-x86:sar64 :rdi 3)
    (sys.lap-x86:sar64 :rcx 3)
    (sys.lap-x86:rep)
    (sys.lap-x86:stos8)
  