[Bug binutils/20709] New: [libopcodes][x86]Failure to disassemble variant encoding of test instruction

[nholcomb at wisc dot edu]

https://sourceware.org/bugzilla/show_bug.cgi?id=20709

            Bug ID: 20709
           Summary: [libopcodes][x86]Failure to disassemble variant
                    encoding of test instruction
           Product: binutils
           Version: 2.26
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: nholcomb at wisc dot edu
  Target Milestone: ---

The following are the bytes of a test instruction and the expected output.
Libopcodes returns a "(bad)" instruction when disassembling these bytes.

Bytes: f6 0b 50
Expected output: test $0x50,(%rbx)

The other possible encoding of this instruction is f6 03 50.

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