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Date: Tue, 08 Oct 2013 15:23:00 -0000
From: "Jan Beulich" <JBeulich@suse.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: <kirill.yukhin@intel.com>,"Binutils" <binutils@sourceware.org>
Subject: Re: [PATCH 3/6] x86/MPX: suppress base/index swapping in Intel mode for bndmk, bndldx, and bndstx
References: <5254349502000078000F9A3D@nat28.tlf.novell.com> <525435E002000078000F9A55@nat28.tlf.novell.com> <CAMe9rOqDp1_mAdthvC=kJt_71K4b59kBXEAguGNMBKhrw24Upg@mail.gmail.com>
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>>> On 08.10.13 at 17:16, "H.J. Lu" <hjl.tools@gmail.com> wrote:
> 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 =3D=3D 0xf30f1b /* b=
ndmk */
>> +          || (current_templates->start->base_opcode & ~1) =3D=3D 0x0f1a=
 /* bnd{ld,st}x */
>>           || i386_regtab[reg_num].reg_type.bitfield.baseindex)
>>         intel_state.index =3D i386_regtab + reg_num;
>>        else
>>
>>
>>
>=20
> We need a testcase for this.

Which is included in patch 1!

Jan