February 2025
Languages
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rust-kperf MacOS 下的未公开的API 的逆向工程。
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ARM SVE2 架构基础 SVE 指令集的设计确实是一个创新，可以支持任意的向量长度而无需修改代码。相比 SSE/AVX/AVX2/AVX512 等指令集，SVE 要优美得多。
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What I like and unlike for Zig
- Likes
- arbitrary width integers and packed structs
- generic types are functions at the type level
- error union types
- c interop
- the build system
- Unlikes
- error handling, than Rust's Result
- shadowing is forbidden
- compile time duck typing: anytype
- no typeclasses/traits
- comptime is probably not interesting as it looks
- non encapsulion
- memory safety is highly underestimated and fallacious
- lazy compilation
- no destructors
- no (unicode) strings.
- Likes
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QBE QBE is a compiler backend that aims to provide 70% of the performance of industrial optimizing compilers in 10% of the code.
- like LLVM IR, but simpler.
- ~10k lines of c code. (vs 1M lines of LLVM), 代码量少，Pure C，是一个很好的学习编译期后端的参考。
- support for amd64 (linux and osx), arm64, and riscv64.
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指令选择过程以 IR 为输入，输出一系列使用无限寄存器的指令，分为如下阶段：
- 构建初始 Selection DAG
- 优化
- 类型合法化
- 优化
- 操作合法化
- 优化
- 目标指令选择
- 调度核形成。
注意：您可以通过在调用llc时作为命令行参数传递-view-dag-combine1-dags、-view-legalize-dags、-view-dag-combine2-dags、 -view-isel-dags或-view-sched-dags来告诉LLVM在指令选择过程的各个阶段生成选择DAG的可视化表示。 -debug参数告诉llc生成选择DAG的文本表示。
作者：图灵智能 链接：https://www.zhihu.com/question/500409301/answer/3210484073 来源：知乎 著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。
MPP & OLAP
Web & Visualization
- The State of WASM - 2024 and 2025
- ESM integration,
import {add} from './my-math.wasm'
- ESM integration,