fuhsnn

13 ms·

181.
by fuhsnn 2y ago
I'm currently pondering an IR format for a mildly optimizing C23 implementation, and am curious how C11 atomic operations would look like in sea-of-nodes. The representation seems to be completely opposite to the programming model, whe
182.
by fuhsnn 2y ago
It'll be great if there's some way to auto generate plugin templates or hardware controller presets, Ctrlr[0] might be a good target. [0] https://github.com/RomanKubiak/ctrlr
183.
by fuhsnn 2y ago
>I also have some ideas how to make this defer implementation work with break and continue, but that is unfortunately a bit more nasty. This is the kind of things better done in the compiler, I implemented the n3199 variant of defer[1],
184.
by fuhsnn 2y ago
Aside from "making C++ safe", the design looks like a good opportunity to have better Rust interop, if a standardized FFI with clear object lifetime semantics can be established between C++ and Rust, it's a win for everyone.
185.
by fuhsnn 2y ago
"llvm-readelf --elf-output-style=JSON | jq" is handy.
186.
by fuhsnn 2y ago
https://github.com/vnmakarov/mir is also great for this, the c2m binary is an optimizing C11 JIT runner, even accept "*.c" as input.
187.
by fuhsnn 2y ago
I have some experience getting several non-trivial projects to build with a small C compiler [1]. Generally, the more a toolchain resemblance, say GCC, the more GCC specific stuff build scripts will feed to it, this may send you down a rabb
188.
by fuhsnn 2y ago
>From there they can bootstrap yacc, basic coreutils, Bash, autotools, and eventually GCC ... it’s a fascinating process. I would say about half of the list can be trimmed off if you managed to separate GCC 4 and binutils from their orig
189.
by fuhsnn 2y ago
Perl, at build time, get errno numbers of the system in a similar way[0]: preprocess errno.h with `$CC -E` and recursively scan all files in # markers for macro defines. The configure script even checks the existence of several system heade
190.
by fuhsnn 2y ago
I imagine a new kind of instant camera, instead of printing the photo they upload to a satellite blockchain, timestamp the time of shooting. Zero privacy but hopefully more truthful representation of the world. Before AI filters of any kind
191.
by fuhsnn 2y ago
>throw a random-number generator at all the delay times Reverb algorithms are indeed random enough, a leading audio plugin brand once came up with a randomizing reverb freeware[0] embedded with a "submit when it sounds cool" bu
192.
by fuhsnn 2y ago
>[[musttail]] also ends the lifetime of local objects AFAICS. That's good to know. I had this github issue [0] in the back of my mind, as well as witnessing occasions of clang turning [[musttail]] into inner loops, and concluded cla
193.
by fuhsnn 2y ago
A C standard proposal exists for tail call [0], in the form of "return goto (expression);". What I like about it, over standardizing [[musttail]], is that lifetimes of local objects are guaranteed to end. This makes it possible to
194.
by fuhsnn 2y ago
I did found plenty of docs and books mentioning setrusage() though, like a proper Mandela Effect.
195.
by fuhsnn 2y ago
>setrusage() Is it old version of setrlimit()? Couldn't locate it in any of the man.*bsd.org.
196.
by fuhsnn 2y ago
>just a simple case of bad code generation render little compiler into a toy one If you find some time to go through gcc bugzilla you'll find shockingly simple snippets of code that miscompiled (often by optimization passes), with f
197.
by fuhsnn 2y ago
chibicc[0] complement this book nicely, in addition to a basic compiler, it guides you through writing the preprocessor and driver, which, although not addressed much in literature, are the missing link between the compiler built from the b
198.
by fuhsnn 2y ago
>If there is some library that can help create machine code from assembly instructions on a line by line basis That's what JIT libraries do, for example asmjit: https://github.com/asmjit/asmjit/blob/ma
199.
by fuhsnn 2y ago
It's in fact very common to microcode instructions at early iterations of an arch. https://uops.info/table.html is a nice place if certain instructions being slow brings joy to your life.
200.
by fuhsnn 2y ago
That thread already spawned a GCC-wiki page https://gcc.gnu.org/wiki/boringcc , with a quote in bold: >The only thing stopping gcc from becoming the desired boringcc is to find the people willing to do the work. And
201.
by fuhsnn 2y ago
In its current form without at least requiring balanced enclosing brackets, dropping the semantic check will make _Generic a new macro expansion system worthy of a dedicated round of obfuscated C contest.