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Re: Bug: gather/scatter accepts same registers in destination/src and index
- From: "Jan Beulich" <JBeulich at suse dot com>
- To: "Michael Zolotukhin" <michael dot v dot zolotukhin at gmail dot com>
- Cc: "H.J. Lu" <hjl dot tools at gmail dot com>, "binutils at sourceware dot org" <binutils at sourceware dot org>
- Date: Wed, 22 Jan 2014 08:00:19 +0000
- Subject: Re: Bug: gather/scatter accepts same registers in destination/src and index
- Authentication-results: sourceware.org; auth=none
- References: <CANtU078XuYEQ8AnKR2BQoRSSByKLAf_TrzdpjEO=4h09U524gQ at mail dot gmail dot com> <52DE438B0200007800115421 at nat28 dot tlf dot novell dot com> <20140121111627 dot GC13904 at msticlxl57 dot ims dot intel dot com> <CAMe9rOpLKpmSR-vYpOE5RS3BDn2P7PewSVh85-zTHy4ZUxXvuA at mail dot gmail dot com> <20140121135628 dot GF13904 at msticlxl57 dot ims dot intel dot com> <52DE93F00200007800115670 at nat28 dot tlf dot novell dot com> <CANtU0782E-KwJbEQf=Otvq0h+0vhLXoi2yYip0gkZdonRBVvOQ at mail dot gmail dot com> <52DE96420200007800115697 at nat28 dot tlf dot novell dot com> <CANtU07_huE8K_xvb9LNg11F9zZ5RzGO9gT_r=b9j_DVG3y1PzA at mail dot gmail dot com> <52DEA12A02000078001156E4 at nat28 dot tlf dot novell dot com> <CANtU079dG0X3dPbDV8Xhxb6aybUrmzqAxJCv4bCmG-Gf+fLVSQ at mail dot gmail dot com>
>>> On 21.01.14 at 19:44, Michael Zolotukhin <michael.v.zolotukhin@gmail.com> wrote:
>> While
>>
>> vmovaps [rax], zmm0
>>
>> is allowed
>>
>> vscatterdps [rax]{k1}, zmm0
>>
>> isn't, i.e. this is not a typical "invalid operand". Same for gather
>> of course. Also, I'm not sure if this
>>
>> vscatterdps [rax+zmm1], zmm0
>>
>> (also invalid iirc) is being checked for already.
> I see what you meant, it is a good point. However, I think it's better
> to be a separate patch, what do you think?
The subject of the mail would say otherwise, but I don't really
care whether that gets done in one or multiple patches.
Jan