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aykevl.nl
| | coredumped.dev
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| | In this post, we are going to take a deep dive into pointer tagging, where metadata is encoded into a word-sized pointer. Doing so allows us to keep a compact representation that can be passed around in machine registers. This is very common in implementing dynamic programming languages, but can really be used anywhere that additional runtime information is needed about a pointer. We will look at a handful of different ways these pointers can be encoded and see how the compiler can optimize them for diff...
| | www.bitsnbites.eu
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| | www.javaadvent.com
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| | After exploring Java bytecode in previous years (2022, 2023, 2024), this year we'll take an unexpected detour for a Java advent: instead of generating Java bytecode, we'll use Java to build and execute LLVM IR, the intermediate language behind compilers like clang. Using Java's Foreign Function & Memory (FFM) API, we'll call the LLVM C [...]
| | mcyoung.xyz
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| [AI summary] The article provides an in-depth exploration of computer architecture and assembly language, focusing on the RISC-V Instruction Set Architecture (ISA). It covers fundamental concepts such as machine words, registers, and the role of assembly language as a human-readable representation of machine instructions. The text explains how programs are structured using instructions, labels, and directives, and categorizes instructions into arithmetic, memory, control flow, and miscellaneous types. It also delves into the calling convention, which defines how functions are called and how data is passed between them, and highlights the importance of maintaining the call stack illusion. The article further discusses the practical implications of these conce...