GNU bug report logs - #55431
[PATCH] guix: cpu: recognize other architectures.

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Message #16 received at 55431-done <at> debbugs.gnu.org (full text, mbox):

From: Efraim Flashner <efraim <at> flashner.co.il>
To: Julien Lepiller <julien <at> lepiller.eu>
Cc: 55431-done <at> debbugs.gnu.org
Subject: Re: [bug#55431] [PATCH] guix: cpu: recognize other architectures.
Date: Wed, 18 May 2022 15:05:38 +0300

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On Tue, May 17, 2022 at 05:55:38PM +0200, Julien Lepiller wrote:
> Thanks for fixing that anyway :)
> 
> I was only interested in it because it made me unable to reconfigure my systems. I don't care too much about the --tune code, and I don't understand what you suggest. Do you mean to create "x86 on x86_64" as a separate architecture? Or as a --tune target?
> 

As part of the autotuning process. GCC internally groups i686 and x86_64
together when determining how to tune for --march=native, and I'm pretty
sure I've added some i686 hardware for AMD when I was adding autotuning
support for AMD CPUs. Its similar for aarch64 and armhf, there are armhf
targets internally that accept armv8.X-a targets, so there's no need to
limit armhf tuning to armv7.

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Efraim Flashner   <efraim <at> flashner.co.il>   אפרים פלשנר
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