linux-kernel - Re: [PATCH -tip ] x86/insn: Add Haswell-introduced opcodes

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Message-ID: <5201E2AC.2010604@hitachi.com>
Date:	Wed, 07 Aug 2013 15:01:16 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip ] x86/insn: Add Haswell-introduced opcodes

(2013/08/07 14:03), H. Peter Anvin wrote:
> On 08/06/2013 09:51 PM, Masami Hiramatsu wrote:
>>
>> Thanks, Andi also asked me to support them ;)
>> As far as I can see, that requires more work to support
>> EVEX decoding. And perhaps, I have to classify new instructions
>> and operands and introduce new abbreviations/superscripts for
>> them, because there is no opcode map in the above document.
>>
>> Would you intel guys have any idea about new opcode map?
>>
> 
> What is it you need, specifically?

A new opcode map about AVX-512, which introduces ZMM registers which
has 512-bit width. Perhaps, we need to introduce new code of operand
type for that new large registers, I guess it is Octa-Quadword(oq)? :)
And also, MASK instructions may require new addressing method codes for
opmask registers. Of course I can make new one for those and update
after official opcode map is released, as I did on AVX instructions.

Thank you,

-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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