[Bug gas/27684] New: [PowerPC] Missing extended mnemonic 'mtusprg0', 'mfusprg0', 'mtusprg1', 'mfusprg1', 'mfpir'

[pc at us dot ibm.com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27684

            Bug ID: 27684
           Summary: [PowerPC] Missing extended mnemonic 'mtusprg0',
                    'mfusprg0', 'mtusprg1', 'mfusprg1', 'mfpir'
           Product: binutils
           Version: 2.37 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: pc at us dot ibm.com
  Target Milestone: ---

$ ./gas/as-new --version
GNU assembler (GNU Binutils) 2.36.50.20210401
$ git log -1 --oneline
caaf412e989 (HEAD -> master, origin/master, origin/HEAD) Fix microblaze sim
build error
$ ./gas/as-new -mpwr10
 mtusprg0 0
 mfusprg0 0
 mtusprg1 0
 mfusprg1 0
 mfpir 0
{standard input}: Assembler messages:
{standard input}:1: Error: unrecognized opcode: `mtusprg0'
{standard input}:2: Error: unrecognized opcode: `mfusprg0'
{standard input}:3: Error: unrecognized opcode: `mtusprg1'
{standard input}:4: Error: unrecognized opcode: `mfusprg1'
{standard input}:5: Error: unrecognized opcode: `mfpir'

These extended mnemonics are shown in Power ISA v3.1, Book III, Chapter 5,
5.4.4 "Move To/From System Register Instructions" (pp.1167-1169).

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