Top all-time · #13176
Luke Wren
Personal blog · wren.wtf/shower-thoughtshardwareprogramming
Luke Wren's personal blog at wren.wtf covers hardware and programming. Since 2025, 6 different Hacker News readers have linked it 6 times, most often “Mark's Magic Multiply”. No feed was found, so read it on the site itself.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
Luke Wren's posts on RISC-V and hardware design, including his Hazard3 core, custom extensions like Xh3bextm, and floating point. Commenters cite them as references without judging the writing.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Most-linked posts?
- Mark's Magic Multiply2 people · 2 mentions · first linked 2026-04-11
What Hacker News says?
An extension he calls Xh3bextm. For extracting multiple bits from bitfields. https://wren.wtf/hazard3/doc/#extension-xh3bextm-section
Comment linking /hazard3/doc/
on “RISC-V Is Sloooow”Submitted 16-Bit Data Pointers on RV32 as a story · 3 points
HN discussionWhen I looked into mconfigptr some years ago I thought it looked like a swirling vortex of pain that might produce something useful some day. Good to see it's still being worked on. Sad to hear ASN.1 is still involved. I added an "misa but more bits" register to my core, using the bit assignment from the RISC-V C API, so at least until then I know what extensions each instance of my core implements. https://wren.wtf…
Comment linking /hazard3/doc/
on “RISC-V: They Should Have Known Better”Submitted Stop Using OpenCode as a story · 2 points
HN discussionlooks like there's no mention of soft-floats support, like in Hazard3 cores see f.e.: https://wren.wtf/shower-thoughts/marks-magic-multiply/
Comment linking /shower-thoughts/marks-magic-multiply/
on “RISC-V and Floating Point”Submitted Mark's Magic Multiply as a story · 2 points
HN discussion