-funsafe-math-optimizations
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︀︀fun AND safe math optimizations? sign me up!

Attractive

Building a Debugger is now officially released!

It guides you through writing a whole native x64 debugger from scratch, dispelling all the magic and teaching you a ton about operating systems as it goes.

Even if you don't care about writing a debugger, you can read it to your cat.

The Portland Linux Kernel meetup is tomorrow, June 11th, at the Lucky Labrador Beer Hall on NW Quimby https://www.meetup.com/portland-linux-kernel-meetup/events/308186013/ #portland #pdx #linuxkernel #kernel #linux

One week in as a computer architect and I can already fit a line to a single data point!

Internet Archive is looking for engineering managers with a rare set of experiences, and we could use your help.

Do you know someone with extensive experience using PHP as a systems language? Someone who has gardened a petabyte-scale system under high load? Is this person a player/coach engineering manager who enjoys helping other people succeed?

If you do know someone like this, or someone close, I would love to talk to them.

Apply at this link and drop me a line:
https://workforcenow.adp.com/mascsr/default/mdf/recruitment/recruitment.html?cid=12261ced-819c-4d6d-af85-ffea690b6521&ccId=9201102651278_3&lang=en_US&jobId=544659&jwId=9201102651278_1

Dreamt of direct Linux access to your AI card's RISC-V cores? 🤔 Checkout https://github.com/tenstorrent/tt-bh-linux
Tinker, compile, innovate & own your silicon future. Some groups prefer closed software, not @tenstorrent!
If you own a PC with a @tenstorrent Blackhole P100/P150 card, you can try this today in under 5 minutes. No extra hardware needed.
We'd love your feedback.

call your state reps and tell them to make transit their highest budget priority today! this tool makes it easy.

in SF, Matt Haney especially needs to hear from you!

https://www.movecalifornia.org/state-funding

I guess I haven't been paying enough attention, but Intel's APX is a really big update to their ISA:
- 32 GP registers
- setting flags is optional in many cases
- instructions take 3 operands instead of 2

https://www.intel.com/content/www/us/en/developer/articles/technical/advanced-performance-extensions-apx.html

This is hot.

#BikeLane

What makes LLMs work isn't deep neural networks or attention mechanisms or vector databases or anything like that.

What makes LLMs work is our tendency to see faces on toast.

"Congratulations on having your first Pull Request (PR) merged into the LLVM Project!"

It's over for me

I can't believe we replaced blogs and RSS with people emailing their posts to you. just a really obviously stupid step backwards

Is anyone else at Facebook? I can't figure out how to let my VM talk to kernel.org, just copying the GitHub lines didn't work and I can't figure out how to find anything on these internal tools...

https://www.redhat.com/en/about/press-releases/red-hat-prepares-new-future-software-defined-vehicles-upcoming-general-availability-red-hat-vehicle-operating-system ... "Red Hat In-Vehicle Operating System has achieved functional safety certification as a Safety Element out-of-Context (SEooC) against the ISO 26262 Edition 2, 2018- Level ASIL-B standard." Built on top of the GNU Toolchain as a system compiler, with glibc and libstdc++ as the core C and C++ libraries. @gnutools

'"[…] Today we’re very excited to announce the open-source release of the Windows Subsystem for Linux. […] That means that the code that powers WSL is now available on GitHub at Microsoft/WSL and open sourced to the community! You can download WSL and build it from source, add new fixes and features and participate in WSL’s active development."'

https://blogs.windows.com/windowsdeveloper/2025/05/19/the-windows-subsystem-for-linux-is-now-open-source/

Air pollution in Paris before and after they added bike lanes and put restrictions on cars.

I will never understand people needing to drive cars in large cities like Paris.

We found an Apple Silicon CPU issue with FJCVTZS, the "JS-compatible double-to-int32 conversion" instruction that was added to ARMv8.3.

If the Flush-to-Zero flag is set in the FPCR register and FJCVTZS is used with a denormal, my M1 sets the Zero flag to 1 and M2-M4 CPUs set it to 0. This flag indicates whether the conversion was exact. I believe M1 is correct?

Test case: https://gist.github.com/jandem/e6b5660975f145b85d533b97ad054f08