>I'm sure I saw an easy way to reverse a byte some time ago in this list, but
>I've forgotten it..
>
>I want to change   b7 b6 b5 b4 b3 b2 b1 b0   to  b0 b1 b2 b3 b4 b5 b6 b7.

I've seen a lot of replies, but to me, the simple 'brute force and
ignorance' technique seems to make the most sense.

    clrf    dest
    btfsc   source,0
      bsf   dest,7
    btfsc   source,1
      bsf   dest,6
    btfsc   source,2
      bsf   dest,5
    btfsc   source,3
      bsf   dest,4
    btfsc   source,4
      bsf   dest,3
    btfsc   source,5
      bsf   dest,2
    btfsc   source,6
      bsf   dest,1
    btfsc   source,7
      bsf   dest,0

17 instructions, 17 cycles

dwayne


Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

Celebrating 15 years of Engineering Innovation (1984 - 1999)

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