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Date: Tue, 08 Oct 2013 15:45:00 -0000
Message-ID: <CAMe9rOpB9=0rgvE0nOZ8o-C1R_EMamgGm8-BRB5DtOGYgs7V0Q@mail.gmail.com>
Subject: Re: [PATCH 5/6] x86/MPX: fix operand size handling
From: "H.J. Lu" <hjl.tools@gmail.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: kirill.yukhin@intel.com, Binutils <binutils@sourceware.org>
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On Tue, Oct 8, 2013 at 7:43 AM, Jan Beulich <JBeulich@suse.com> wrote:
> All MPX instructions in 64-bit mode ignore REX.W, which means we neither
> need to encode this bit nor should disassemble with 32-bit register
> operands.
>
> No MPX instructions would ever take a 16-bit register operand.
>
> gas/
> 2013-10-08  Jan Beulich <jbeulich@suse.com>
>
>         * tc-i386.c (process_suffix): Warn about 32-bit register operands
>         to MPX instructions in 64-bit mode.

I think it should be an error.

> opcodes/
> 2013-10-08  Jan Beulich <jbeulich@suse.com>
>
>         * i386-dis.c (intel_operand_size): Move v_bnd_mode alongside the
>         default case.
>         (OP_E_register): Move v_bnd_mode alongside m_mode.
>         * i386-opc.h (REGNAM_RAX): New.
>         * i386-opc.tbl (bndcl, bndcu, bndcn): Drop Reg16. Add NoRex64.
>         * i386-tbl.h: Re-generate.
>

Should we also remove Disp16?


-- 
H.J.