哪位高手帮看下，这是个什么算法？

发表于 2014-2-13 11:31

L0:    MOV B, #10H
L1:    CLR C
      MOV A, R5
      RLC A
      MOV R5, A
      MOV A, R4
      RLC A
      MOV R4, A
      MOV A, R3
      RLC A
      MOV R3, A
      XCH A, R2
      RLC A
      XCH A, R2
      MOV F0, C
      CLR C
      SUBB A, R7
      MOV 09H, A
      MOV A, R2
      SUBB A, R6
      JB    F0, L2
      JC    L3
L2:    MOV R2, A
      MOV A, 09H
      MOV R3, A
      INC R5
L3:    DJNZ B, L1
      RETI