[Bug binutils/20706] New: [libopcodes][x86] invalid quadword XOP instructions using %ymm registers

[nholcomb at wisc dot edu]

https://sourceware.org/bugzilla/show_bug.cgi?id=20706

            Bug ID: 20706
           Summary: [libopcodes][x86] invalid quadword XOP instructions
                    using %ymm registers
           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 examples of objdump output XOP instructions using %ymm
registers that produce invalid size errors.

Bytes: 8f a9 d6 93 52 07
Instruction: vprotq 0x7(%rdx), %xmm5, %ymm2

Bytes: 8f 29 34 9b 37
Instruction: vpshaq %xmm9, (%rdi), %ymm14

In addition to producing errors if assembled, these bytes are interpreted as an
invalid instruction by other decoders.

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