enh-google

actually, looking at the current latest (https://github.com/riscv/riscv-isa-manual/releases/tag/20240411) i see that Zfh is in the "G" chapter, so at least one extension author agreed with me :-)

i'd also reference "26.8. RVC Instruction Set Listings" and ask why that's in a chapter of its own (and thus, if nothing else, harder to find) rather than combined with...

> recent versions of the spec are a great improvement in terms of actually including the funct3 values [etc] in binary when introducing instructions (100 is more helpful than XOR...

(we should update bionic/docs/clang_fortify_anatomy.md to link to the new page too.)

https://android.googlesource.com/platform/bionic/+/refs/heads/main/docs/clang_fortify_anatomy.md if you want a clickable link. (the bionic ELF TLS documentation is similar --- it starts with a "hey, this is documentation about how it's _implemented_ ... if you're...

@pirama-arumuga-nainar is the expert on code coverage on Android... ("lmk" is short for "let me know".)

Zicbom would let ART do cache flushes.

> > Zicbom would let ART do cache flushes. > > Zicbom isn't currently exposed to userspace. See this thread on the LKML: https://lore.kernel.org/linux-riscv/[email protected]/ ah, the same only-this-core problem that...

> Someone will need to go and figure out why so we can determine if adding unconditional polyfills is something we can pursue or not. this makes it sound like...

> The new part is "and it broke". We haven't been building those things, but other people have. it seems highly unlikely that none of our existing polyfills ever broke...