Hi mpe,
On Wed, May 6, 2020 at 1:45 PM Jordan Niethe [off-list ref] wrote:

Currently unsigned ints are used to represent instructions on powerpc.
This has worked well as instructions have always been 4 byte words.
However, a future ISA version will introduce some changes to

s/a future ISA version will introduce/ISA v3.1 introduces/

instructions that mean this scheme will no longer work as well. This
change is Prefixed Instructions. A prefixed instruction is made up of a
word prefix followed by a word suffix to make an 8 byte double word
instruction. No matter the endianness of the system the prefix always
comes first. Prefixed instructions are only planned for powerpc64.

Introduce a ppc_inst type to represent both prefixed and word
instructions on powerpc64 while keeping it possible to exclusively have
word instructions on powerpc32.

Signed-off-by: Jordan Niethe <redacted>
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