[Bug gas/23419] New: Missing/Wrong Extended Mnemonics for POWER9 mt/fspr

[koenigni at student dot ethz.ch]

https://sourceware.org/bugzilla/show_bug.cgi?id=23419

            Bug ID: 23419
           Summary: Missing/Wrong Extended Mnemonics for POWER9 mt/fspr
           Product: binutils
           Version: 2.32 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: koenigni at student dot ethz.ch
  Target Milestone: ---

Created attachment 11134
  --> https://sourceware.org/bugzilla/attachment.cgi?id=11134&action=edit
Patch

The Power ISA 3.0B suggests having extended mnemonics for moving from and to
the perfomance count registers instead of using mt/fspr, so for example `mfspr
ra, 771` becomes `mfupmc1 ra` or `mfpmc1 ra` (see page 972 in the isa). 

Attached is my humble try at a patch. (I couldn't make `make check` work, I
hope it works).

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