mpu

5 ms·

1.
Fastgen – SOTA LLM inference in 3k lines of Python(github.com)
3 points by mpu 1y ago|1 comments
2.
by mpu 1y ago
We just released a tiny (~3kloc) Python library that implements state-of-the-art inference algorithms on GPU and provides performance similar to vLLM. We believe it's a great learning vehicle for inference techniques and the code is qu
3.
A suggestion for test framework writers(c9x.me)
1 points by mpu 9y ago|0 comments
4.
An undefined behavior adventure(c9x.me)
1 points by mpu 10y ago|0 comments
5.
by mpu 10y ago
Hi, thanks for the information, but LLVM still does not provide ABI compatibility. If you reduce the struct to 3 i32, it is passed in edi, esi, and edx on my machine. However according to the ABI it should be packed in rdi and rsi. Check
6.
by mpu 10y ago
I actually decided to take more time to answer your comment more throughly than others. Also, I TA'd twice the class from where you linked the article below, so I know about it :).
7.
by mpu 10y ago
It's only a goal I set to myself, if we can do better, heck let's do it! Keeping the code short, on the other hand, is really something I care about.
8.
by mpu 10y ago
I think the extra load/stores clutter the IL. Also, QBE does not really "alternate" SSA/non-SSA, SSA form is built once at the beginning of the compilation pipeline and preserved later. I don't understand what you m
9.
by mpu 10y ago
Cool, thank you guys!
10.
by mpu 10y ago
At least, I can try! And also, we are seeing more and more certified C programs: see the DeepSpec NSF expedition grant, the Verified Software Toolchain, and the CertiKOS project for examples. I work with these guys.
11.
by mpu 10y ago
I take this as a compliment. It means my design choice was totally valid, and maybe even a good one.
12.
by mpu 10y ago
Then maybe I did not express myself in the best terms. QBE definitely supports stack slots and their registerization! Minic, a small C frontend shipped with QBE makes use of them. The difference is that LLVM forces you to use them even when
13.
by mpu 10y ago
It's an alternative if you fit in the use case. I did not try to clone LLVM.
14.
by mpu 10y ago
It's much much smaller (I think libfirm is over 100kloc, QBE is about 6k). But the major difference is the IL: I use a human-readable and easily-printable text IL. This means that you don't need a graph-viewing tool to read the IL
15.
by mpu 10y ago
Thank you for your words. It is often called NIH, but eh, I learned a lot! And I think that I made some modest improvements over LLVM, you can check them out in my comparison at http://c9x.me/compile/doc/llvm.html
16.
Show HN: QBE – a new compiler back end(c9x.me)
241 points by mpu 10y ago|68 comments
17.
by mpu 11y ago
12,000 links is probably too much.
18.
Fnt: Create Bitmap Fonts with the Command Line(github.com)
1 points by mpu 11y ago|0 comments
19.
Fnt: Command Line Font Edition Tooling(lists.suckless.org)
3 points by mpu 11y ago|0 comments
20.
Resources for Amateur Compiler Writers [focus on the back end](c9x.me)
4 points by mpu 11y ago|0 comments
21.
by mpu 11y ago
Hurray, no floating points!
22.
by mpu 11y ago
So you rewrote the whole thing.
23.
by mpu 11y ago
You're wrong about the arrays, the standard guarantees that zeroing the bytes of an object of integer type will give a 0 value to the integer. Pointers are a different matter though.
24.
by mpu 11y ago
Bullshit, on x64 all 32 or 64 bit base arithmetic operations have the exact same cost, except the 64 bit version is one byte longer because of a REX prefix. This is why 32 bits is the natural int size for x64.
25.
by mpu 11y ago
Bc and dc do exact arithmetic.
26.
by mpu 11y ago
Anybody who wrote a medium-sized project in C is aware of such a trick. And also of the load of problems that comes with it! (They are not really pointers anymore.) Please stop trying to make C look like javascript, just create a new langua
27.
by mpu 11y ago
That's what Cello is about I think.
28.
by mpu 11y ago
Isn't it possible to talk about variance as soon as you have a type constructor (function from types to types)? In this case []. Edit: I don't know go, but if slices give write access, I think the automatic conversion the author
29.
by mpu 11y ago
Thank you, I fixed that. In my head I knew a REX prefix was necessary and thought it was sufficient, but i386 has shortcuts to load an immediate into a register that are not available in 64 bits version! Thanks for mentioning that.
30.
Loading an x64 register, how hard could it be?(c9x.me)
51 points by mpu 11y ago|17 comments

More ›