[Bug gas/28919] New: powerpc e500mc Error: unrecognized opcode: `isel'

[judge.packham+glibc at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28919

            Bug ID: 28919
           Summary: powerpc e500mc Error: unrecognized opcode: `isel'
           Product: binutils
           Version: 2.38
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: judge.packham+glibc at gmail dot com
  Target Milestone: ---

When building with -mcpu=e500mc the assembler reports produces the following
error

[ALL  ]    /tmp/ccafVatb.s: Assembler messages:
[ERROR]    /tmp/ccafVatb.s:143: Error: unrecognized opcode: `isel'
[ERROR]    /tmp/ccafVatb.s:146: Error: unrecognized opcode: `isel'
[ERROR]    /tmp/ccafVatb.s:502: Error: unrecognized opcode: `isel'
[ERROR]    /tmp/ccafVatb.s:3781: Error: unrecognized opcode: `isel'

According to the EREF manual isel is a valid instruction for e500mc and GCC
certainly thinks it is free to use it but gas doesn't allow it.

I'll try and narrow things down to a simple reproduction.

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