Stafford Horne

Born in California and studied Computer Hacking, a job took me to Beijing then to Tokyo. OpenRISC maintainer. Tweet about FOSSi and embedded.

[Stafford Horne @stffrdhrn]

The OoenRISC glibc hardware floating point support is getting some love again. I finally have a few brain cycles to spend on this and finished the kernel docs in a blog post.

https://t.co/Go1Q8UTOtn

[Stafford Horne @stffrdhrn]

I finally finished the second installment in my series on the OpenRISC FPU port. Here we discuss updating hardware and simulators.

https://t.co/Ovj6ctpsit

[Stafford Horne @stffrdhrn]

Someone ask me for some docker images to make it easy to setup the OpenRISC toolchain and simulator environment. Here they are; I have both or1ksim (or1k-sim-env) and fusesoc (or1k-verilog-env) environments.

I hope its useful.

https://t.co/qKUDbUuHoX

[Stafford Horne @stffrdhrn]

@redhog_org Cool writeup on these

https://t.co/wYgVOZYR0L

[Stafford Horne @stffrdhrn]

In the Linux kernel crypto libraries there are several machine generated constant time math algorithms. I find these fascinating.

Talk about walls of code.

https://t.co/JXuZ4RaJZk

[Stafford Horne @stffrdhrn]

@redhog_org There is a different implementation in signal too originally written by Google.

https://t.co/A2M8KCv6vC

However, it looks like that was replaced by a rust rewrite.

https://t.co/D347YpQ6FZ

[Stafford Horne @stffrdhrn]

@kubatyszko Hopefully not part of the keyboard

[Stafford Horne @stffrdhrn]

Here is a start of a series on how we went about porting GLIBC to support the OpenRISC FPU.
https://t.co/K7CaTWv7r6

[Stafford Horne @stffrdhrn]

Wow, I just found @Embecosm maintains an OpenRISC toolchain download page, that's nice.

https://t.co/2FRxDGyiZp

[Stafford Horne @stffrdhrn]

@muwlgr @minut_e This board looks like a beast so I was hopeful it might have a PCI bus. But yes, it could be all memory mapped devices, so maybe just look under /sys/devices/platform.

[Stafford Horne @stffrdhrn]

@kubatyszko @OpenWRT2 You were lucky your battery was still charged.

[Stafford Horne @stffrdhrn]

@yannsionneau I think it deserves a blog entry. It was a interesting full stack cross cutting project.

[Stafford Horne @stffrdhrn]

I have been working on getting the OpenRISC FPU supported in linux and now all GLIBC math tests PASS! This required adding support and fixing bugs in QEMU, Linux, GCC and glibc. The last fix took the the longest, and is right here can you spot it:

https://t.co/HUEO2l3Cv5

[Stafford Horne @stffrdhrn]

Here is the answer

https://t.co/VC2bFtFcJk

[Stafford Horne @stffrdhrn]

@mxshift Don't give up on kids, I'm sure it will mean something to them in the long run even if your don't talk. Maybe change it to a weekly call on Saturday/Sunday?

[Stafford Horne @stffrdhrn]

@Lord_Arse I tried to organize, I have a big bag of little bags each labeled. i.e. 1.35mm audio, USB micro, USB mini, pro audio, and my favorite USB obsolete.

[Stafford Horne @stffrdhrn]

We have now got OpenRISC PCI support upstream for Linux 5.20/6.0.

https://t.co/GZCQsaNOJm