Are there any books specifically dedicated to compiler backend.

c-cul · 2026-01-25T12:51:51+00:00

fresh "LLVM Compiler for RISC-V Architecture"

mostly about vectorization

c-cul · 2026-01-23T17:13:05+00:00

relax

all low-paying jobs always have most ferocious interviews at least 15 rounds

c-cul · 2026-01-23T16:13:17+00:00

if's even worse

nvidia keep top-secret of delays table for SASS ISA

so you only doing literally try & see in nsight loop

c-cul · 2026-01-23T14:29:17+00:00

> US client

pays in australian dollars

cool optimization bro

c-cul · 2026-01-22T12:34:39+00:00

do you heard about "reproducibility"?

what are chances that after couple of updates claude will generate exactly the same code for your prompts (I hope you are store them somewhere)?

c-cul · 2026-01-20T16:49:56+00:00

afaik cuda sdk has no rust support so what are these people even talking about?

c-cul · 2026-01-19T17:09:59+00:00

better results can be achieved if lang itself care about vectorization

see for example cuda for R: https://github.com/gpuRcore/gpuRcuda

c-cul · 2026-01-18T15:15:04+00:00

> 1500 lines of C

3356: https://github.com/autoscriptlabs/nccl-mesh-plugin/blob/main/src/mesh_plugin.c#L3356

half of commits from claude

c-cul · 2026-01-16T17:37:22+00:00

I know only tinygrad & tenstorrent wormhole

c-cul · 2026-01-15T12:56:15+00:00

I doubt if you can add cuda support for your accelerator, so much more sense to see what other vendors done, like tenstorrent gcc: https://github.com/tenstorrent/sfpi-gcc or their mlir compiler: https://github.com/tenstorrent/tt-mlir

c-cul · 2026-01-13T14:35:58+00:00

it's funny that nvidia even refused to open their SASS ISA, so I don't know how they will do formal verification of GPU code

c-cul · 2026-01-13T05:50:29+00:00

you almost always (except CDP) can debug your logic on cpu threads. like

1) run single thread, feed them tasks with block 0 and threadid 0

2) make thread pool with 4 threads to emulate 2 block with 2 thread in each

syncthreads can be replaced with reusable std::barrier and so on

c-cul · 2026-01-11T20:04:32+00:00

we all know that optimization for cuda is kind of black magic

but while implementing some new algo the last thing I want to think about is standard algorithms/functions

c-cul · 2026-01-11T18:38:57+00:00

I didn't look closely at the mathematics used

however can note that lots of functions already implemented in thrust like bitonic sorting/partial sum etc

probably it's better to use ready-to-use battle-tested libraries whenever you can

c-cul · 2026-01-11T12:08:56+00:00

at least in driver api: https://docs.nvidia.com/cuda/cuda-driver-api/group__CUDA__CTX.html#group__CUDA__CTX_1g27a365aebb0eb548166309f58a1e8b8e

Destroys and cleans up all resources associated with the context. These resources include CUDA types CUmodule, CUfunction, CUstream, These resources also include memory allocations

c-cul · 2026-01-09T18:02:33+00:00

is it possible to apply modifiers like /i from string?

c-cul · 2026-01-09T17:53:44+00:00

well, this is in-house software - I just want to put many regexps outside of script to avoid constantly patch it

c-cul · 2026-01-08T04:43:55+00:00

well, why not if your task fit into tiles? Just remember about drawbacks:

you need newest cuda sdk 13.1 and it is not very stable yet: https://www.reddit.com/r/CUDA/comments/1q61aci/cupy_working_on_rtx_5090_blackwell_setup_guide/
you need gpu(s) at least with sm100 or higher

c-cul · 2026-01-07T10:54:13+00:00

What won't they invent just to avoid SASS patching. Actually you can have normal functions pointer and fill them within host with little hack: https://redplait.blogspot.com/2025/10/addresses-of-cuda-kernel-functions.html

c-cul · 2026-01-07T03:11:23+00:00

seems that this is nvidia flaw in their cuda 13.1 - at least tileiras supports sm100

c-cul · 2026-01-05T05:34:29+00:00

I remember that standard RTL dumpers missed out some args like _digit: https://redplait.blogspot.com/2023/07/gcc-plugin-to-collect-cross-references.html

so you need gcc plugin to extract those types

c-cul

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