<micttyl>
hello folks, do you know where i can find the Unmatched mini itx? i looked around for a preowned, it seems people haven't yet enjoyed enough?
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* pabs3
would suggest waiting for the next iteration of (faster) hardware; visionfive2, star64, etc
<jrtc27>
forums.sifive.com occasionally has people selling them
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<bjdooks>
I really hope they are doing the pro-p550 or I am out of a job
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<conchuod>
optee in opensbi 🤔
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<prabhakarlad>
Hi all, quick Q regarding handling vendor_ext_provider() callbacks in OpenSBI. Should the callback check extid every time and if not expected return 0/einval?
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* jrtc27
decides to play electronics teacher
<conchuod>
jrtc27: leave me out of it!
<conchuod>
jrtc27: I also think that the description for that property is poor
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<vineetg762>
kito-cheng: Do you know if gcc generates a generic builtin corresponding to -m[no-]strict-align - quick look shows nothing which is a bit surprising
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<jrtc27>
builtin?
<jrtc27>
why would a command-line option make gcc generate a builtin?
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<vineetg762>
jrtc27: preprocessor builtin - e.g. -march=rv64gv generates __riscv_vector
<vineetg762>
maybe poor wording - preprocessor maro - but the gcc internal function to do that is called builtin_something
<jrtc27>
hm, GCC does seem to call this a "CPP builtin"
<jrtc27>
ew
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<palmer>
vineetg762: IIRC they're all in riscv-c.cc, I'm not seeing anything for misaligned access speed/support
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<vineetg762>
palmer: yeah we need to add one
<jrtc27>
I'm generally of the view you shouldn't have one, you should write the unaligned form and let the compiler optimise it to the aligned form
<jrtc27>
but I know Arm does
<vineetg762>
A lib writer can have 2 implementations and use the macro to compile time select one vs. other
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<vineetg762>
what u propose is hard to do for compiler for asm code
<jrtc27>
compilers don't see assembly so not sure what your point is there
<vineetg762>
yeah ideally it would be great if compiler did all the fancy stuff for us ;-)
<vineetg762>
ok it is more of a gcc driver macro
<jrtc27>
normally you just do something like `uint32_t x; memcpy(&x, p, 4); ...` and let the compiler optimise that to `uint32_t x = *(uint32_t *)p`
<jrtc27>
it's rare that you need something else
<vineetg762>
we can't write vector optimized code in "C"
<jrtc27>
yes you can
<jrtc27>
use the intrinsics
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<vineetg762>
jrtc27: You comment about memset() before read "hide bugs from sanitizers" - are u suggesting we don't init the buffer
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