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Re: [PATCH] Don't write beyond destination in __mempcpy_avx512_no_vzeroupper (bug 23196)

On Mai 22 2018, "H.J. Lu" <hjl.tools@gmail.com> wrote:

> On Tue, May 22, 2018 at 5:38 AM, Andreas Schwab <schwab@suse.de> wrote:
>> On Mai 22 2018, "H.J. Lu" <hjl.tools@gmail.com> wrote:
>>
>>> It should also fail without the fix.
>>
>> Again, tell me how to do that.
>
> You need to trigger this condition on all AVX512 machines.

Again, tell me how to do that.

> memmove-vec-unaligned-erms.S is a template.  It can be used to
> implement AVX512 memmove without vzeroupper.

How is that relevant?

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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