I use a  processor from before Noah,  an  AMD Athlon II X4 630 2.8 GHz,
 I believe its  pre- 2011 and useS the K10  microarchitecture , which
doesn't  support AVX calls.

73
LES
W2LPL



On Tue, Jun 8, 2021 at 8:15 PM Bill Somerville <g4...@classdesign.com>
wrote:

> Warren,
>
> I did say "In order to gauge how much backwards compatibility for older
> CPUs we will have to implement it would help to know who is using such
> older processors." Of course we would build in support for older
> technologies.
>
> 73
> Bill
> G4WJS.
>
> On 09/06/2021 01:02, halst...@gmail.com wrote:
>
> Many people snag old tablet computers for portable use, so I am going to
> conjecture that there are a good number that do not support AVX out there.
>
> Even the new(-ish) Surface Go 2 has a Pentium Gold processor without AVX.
>
> (Note: Pentium and Celeron processors based off the Tiger Lake have AVX2
> and AVX-512 support).
>
> Is there a way to build the support in and only make the AVX calls if the
> software detects CPU compatibility?
>
> Warren
> KN6HXP
>
> On Tue, Jun 8, 2021, 4:38 PM Bill Somerville <g4...@classdesign.com>
> wrote:
>
>> Hi all WSJT-X users,
>>
>> we are looking into some performance enhancements that will take
>> advantage of some parallel processing features of modern CPU
>> architectures. In order to gauge how much backwards compatibility for
>> older CPUs we will have to implement it would help to know who is using
>> such older processors. Please don't turn this thread in to a mine is
>> better than yours conversation, all I need to know is who or how many of
>> you are using the older CPU architectures. Note that this applies to MS
>> Windows, Intel Linux, and Intel macOS users, it is about CPUs not
>> operating systems.
>>
>> The technology we will use is called AVX and that is present on all
>> Intel CPUs branded Core i3/i5/i7/i9 (circa 2010 to present), it is also
>> present on AMD CPUs since the Jaguar or Puma based CPU models (some late
>> Athlon-II CPUs, all Zen based CPUs, including Ryzen) circa 2013 to
>> present.
>>
>> Notably Intel CPUs branded Celeron, Pentium, or Atom do not support the
>> AVX technology.
>>
>> So in summary, look up your CPU and if it **does not support AVX**
>> (https://en.wikipedia.org/wiki/Advanced_Vector_Extensions) then let me
>> know.
>>
>> 73
>> Bill
>> G4WJS.
>>
>
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