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Address syntax (x,y)

Discussion in 'Engineering & Reverse Engineering' started by Hayate, Jun 29, 2007.

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  1. Jun 29, 2007 #1
    Hayate

    Hayate

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    What does something like

    move.w (pc,d0.w),d0

    mean? Is it the same as

    move.w X(pc),d0

    but for registers instead of constants?
     
  2. Jun 29, 2007 #2
    drx

    drx

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    :rolleyes:
    move.w X(pc,d0.w),d0

    Essentially this copies a word at address (X+d0.w) to d0. Additionally, the pc part makes sure the instruction is relative (taking less space, and stored in the form of a relative pointer to X from the current pc rather than absolute)
     
  3. Jun 30, 2007 #3
    Sik

    Sik

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    being an asshole =P
    Basically, yes.
     
  4. Jul 1, 2007 #4
    drx

    drx

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    :rolleyes:
    That is not true. You can still put a constant before (pc,dX.w), eg. 4(pc,d0.w). (pc,d0.w) alone means nothing other than 0(pc,d0.w).
     
  5. Jul 2, 2007 #5
    Hayate

    Hayate

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    Nice, thanks for the info guys :)
     
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