Re: Bumping CPU baseline to x86-64-v2

Ralf Gommers via NumPy-Discussion <[email protected]>
Newsgroups gmane.comp.python.numeric.general
Message-ID <CABL7CQjgrwG8iy7BWjiXqAS83oSABMgWXH+t7qPbV-HcFL87Gw@mail.gmail.com>
On Sun, May 18, 2025 at 9:40 AM Jerome Kieffer <[email protected]>
wrote:

> Hi,
>
> First I would like to highlight that "X86_V2" is very specific to the
> implementation in numpy, basically this implies the support of all 128
> bits SIMD extensions, i.e. SSE1,2,3&4, but does apparenty not requires
> any 256bit SIMD (AVX).
>

It isn't specific to NumPy. These are the psABI levels (
https://gitlab.com/x86-psABIs/x86-64-ABI), which is the closest thing there
is to a standard for SIMD instruction sets.

Here are some examples of Linux distros moving to x86-64-v2:
- Fedora 42:
https://fedoraproject.org/wiki/Changes/Optimized_Binaries_for_the_AMD64_Architecture_v2
- RHEL 9:
https://developers.redhat.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level#

Cheers,
Ralf

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