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From: R0b0t1 <r030t1 AT gmail DOT com>
Date: Sat, 14 Apr 2018 00:00:01 -0500
Message-ID: <CAAD4mYh+Yy0K1WMdsbGk-LwBUdFB5q9_05J4TzGv0xxyGD28ug@mail.gmail.com>
Subject: Re: failure notice
To: Brian DOT Inglis AT systematicsw DOT ab DOT ca, cygwin AT cygwin DOT com
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On Fri, Apr 13, 2018 at 10:51 PM, Brian Inglis
<Brian DOT Inglis AT systematicsw DOT ab DOT ca> wrote:
> On 2018-04-13 21:10, Jeffrey Walton wrote:
>>> On Fri, Apr 13, 2018 at 8:36 PM, Jeffrey Walton <noloader AT gmail DOT com> wrote:
>>>> On Fri, Apr 13, 2018 at 7:51 AM, Corinna Vinschen
>>>> <corinna-cygwin AT cygwin DOT com> wrote:
>>>>> On Apr 12 23:01, Jeffrey Walton wrote:
>>>>>> Hi Everyone,
>>>>>>
>>>>>> I'm working on an AMD A6-9220 and seeing unusual results from
>>>>>> /proc/cpuinfo. I think this may be an issue with the latest Cygwin. It
>>>>>> may be present in earlier versions, too.
>>>>>>
>>>>>> Russinovich's coreinfo is shown below
>>>>>> (https://docs.microsoft.com/en-us/sysinternals/downloads/coreinfo).
>>>>>> Notice /proc/cpuinfo is missing aesni, pclmul, rdrand, SSE4.1, SSE4.2,
>>>>>> AVX, etc.
>>>>>
>>>>> Note that, in theory, cpuinfo has to be extended for each new CPU
>>>>> generation.  That's a lot of work for marginal gain (Cygwin's not a real
>>>>> kernel) so I'm doing this only very seldomly.
>>>>>
>>>>> Patches welcome, of course!
>>>>
>>>> Thanks Corinna. I think I found the file of interest at fhandler_proc.cc.
>>>>
>>>> Whitespace is a bit off. It is a mix of tabs and space:
>>>>
>>>>       if (features1 & (1 << 0))
>>>>     print (" fpu");
>>>>       if (features1 & (1 << 1))
>>>>     print (" vme");
>>>>
>>>> Should I perform a whitespace check-in before things begin? Or can you
>>>> knock it out?
>>>
>>> The attachment is pp 572-74 from AMD's Programmer's Guide, Volume 3,
>>> General-Purpose and System Instructions (December 2017)
>>> (https://support.amd.com/TechDocs/24594.pdf). I believe it has the all
>>> the necessary information.
>>>
>>> Are there any objections to using it?
>> Any ideas how to get this through? It is a three page PDF extracted from the
>> AMD manual. It has the necessary information for the CPUID updates.
> Just include the link to Appendix D section 2 from the ToC:
> https://support.amd.com/TechDocs/24594.pdf#G14.931059
>

He may be concerned about the longterm availability of the referenced passages.

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