Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Luke Wren @wren6991@types.pl

11/16/2025, 9:44:39 PM

Public

Today in "RISC-V is incredibly vague about important things": they changed the wording in the spec to imply that writing to one half of `mcycle` or `minstret` suppresses the increment of the other half.

I thought the old wording was pretty clear and I actually had a test that it did *not* do that.

Is it good when the source code for your processor has to reference github issues to clarify spec details?

Git patch that is basically me being passive aggressive about what a shitshow the RISC-V spec is (very passive though)

Luke Wren @wren6991@types.pl

11/17/2025, 1:00:10 AM

Public

They added a test for the updated spec wording, but:

* The new test was wrong on some implementations (mine)

* My fix for the test was *also* wrong on some implementations (not mine)

It's really hard to definitely state any facts about all RISC-V cores

https://github.com/riscv-software-src/riscv-tests/pull/634

Clear mcountinhibit.ir in minstret test to ensure minstret increments. by Wren6991 · Pull Request #634 · riscv-software-src/riscv-tests

This test assumes that minstret is already running, but the spec does not mandate a reset value for mcountinhibit. My implementation deliberately resets mcountinhibit to all-ones to save energy and...

github.com · GitHub

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