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Date: Tue, 08 Oct 2013 15:16:00 -0000
Message-ID: <CAMe9rOqDp1_mAdthvC=kJt_71K4b59kBXEAguGNMBKhrw24Upg@mail.gmail.com>
Subject: Re: [PATCH 3/6] x86/MPX: suppress base/index swapping in Intel mode for bndmk, bndldx, and bndstx
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 7:42 AM, Jan Beulich <JBeulich@suse.com> wrote:
> bndmk, bndldx, and bndstx assign special meaning to base and index
> registers, and hence silently swapping the registers should be
> suppressed.
>
> gas/
> 2013-10-08  Jan Beulich <jbeulich@suse.com>
>
>         * tc-i386.c (i386_intel_simplify_register): Suppress base/index
>         swapping for bndmk, bndldx, and bndstx.
>
> --- 2013-10-07/gas/config/tc-i386-intel.c
> +++ 2013-10-07/gas/config/tc-i386-intel.c
> @@ -291,6 +291,8 @@ i386_intel_simplify_register (expression
>    else if (!intel_state.index)
>      {
>        if (intel_state.in_scale
> +          || current_templates->start->base_opcode == 0xf30f1b /* bndmk */
> +          || (current_templates->start->base_opcode & ~1) == 0x0f1a /* bnd{ld,st}x */
>           || i386_regtab[reg_num].reg_type.bitfield.baseindex)
>         intel_state.index = i386_regtab + reg_num;
>        else
>
>
>

We need a testcase for this.


-- 
H.J.