https://bugs.kde.org/show_bug.cgi?id=450025

--- Comment #1 from Carl Love <c...@us.ibm.com> ---
Created attachment 146589
  --> https://bugs.kde.org/attachment.cgi?id=146589&action=edit
Patch to change ACC to overlay VSRs

Initial ACC support was implemented to use a separate  register file, but in
practice (ISA 3.1) the hardware implementation
logically overlays over the existing VSR registers. This may change in future
hardware, so the current implementation assumes ACC
 and VSRs logically contain the same data, but code remains in place to support
 future implementations that may require a separate register file.

The patch reworks the code to support the ACC as implemented as a logical
mapping over the VSR registers, and lays groundwork for a future implementation
utilizing a separate register file.  There is a single boolean variable,
ACC_mapped_on_VSR, that can be set in
disInstr_PPC_WRK(), based on the ISA being used, to select which implementation
model to use.

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