[Bug binutils/20763] New: 8e opcode wrong disassembling

[anatolymik at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20763

            Bug ID: 20763
           Summary: 8e opcode wrong disassembling
           Product: binutils
           Version: 2.26
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: anatolymik at gmail dot com
  Target Milestone: ---

8e opcode(mov Sw, Ew) is disassembled wrong for source register operand.

There is example for 16-bit mode here:
66 8e c0:    mov es, eax

but must be:
66 8e c0:    mov es, ax

Most significant bits of source register is ignored unlike 8c opcode(mov Ev,
Sw). For 8c opcode most significant bits are zeroed if operand size is larger
than 16 bit.

Source register is 16-bit for all processor modes.

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