Hacker News with Generative AI: Assembly Language

Customasm – An assembler for custom, user-defined instruction sets (github.com/hlorenzi)
customasm is an assembler that allows you to provide your own custom instruction sets to assemble your source files!

Assembly Language, Programming, Tools, Computer Architecture

73 points by zdw 5 days ago | 17 comments

Agner Fog's Software Optimization Resources (agner.org)
This series of five manuals describes everything you need to know about optimizing code for x86 and x86-64 family microprocessors, including optimization advices for C++ and assembly language, details about the microarchitecture and instruction timings of most Intel, AMD and VIA processors, and details about different compilers and calling conventions.

Software Optimization, C++, Assembly Language, Microprocessors, Intel, AMD, VIA

4 points by davikr 15 days ago | 1 comments

Write Your Own Virtual Machine (2022) (jmeiners.com)
In this tutorial, I will teach you how to write your own virtual machine (VM) that can run assembly language programs, such as my friend’s 2048 or my Roguelike.

Virtual Machines, Programming, Tutorials, Assembly Language

338 points by sebg 22 days ago | 97 comments

Bit Vectors and my first steps into assembly (smidt.dev)
I’ve recently started reading “Writing an Interpreter in Go” as part of my journey to sharpen my programming skills.

Programming, Assembly Language, Learning Resources

114 points by thunderbong 27 days ago | 43 comments

Rules to avoid common extended inline assembly mistakes (nullprogram.com)
GCC and Clang inline assembly is an interface between high and low level programming languages. It is subtle and treacherous. Many are ensnared in its traps, usually unknowingly. As such, the asm keyword is essentially the unsafe keyword of C and C++. Nearly every inline assembly tutorial, including the awful ibilio page at the top of search engines for decades, propagate fundamental, serious mistakes, and most examples are incorrect. The dangerous part is that the examples usually produce the expected results!

Programming, Assembly Language, GCC, Clang, Software Engineering

79 points by ingve 28 days ago | 19 comments

Bit-permuting 16 u32s at once with AVX-512 (blogspot.com)
The basic trick to apply the same bit-permutation to each of the u32s is to view them as matrix of 16 rows by 32 columns, transpose it into a 32 u16s, permute those u16s in the same way that we wanted to permute the bits of the u32s [1], then transpose back to 16 u32s. Easy:

Computer Architecture, Optimization, Assembly Language

24 points by mfiguiere 37 days ago | 1 comments

BareMetal OS (github.com/ReturnInfinity)
BareMetal OS is an exokernel-based operating system crafted entirely in x86-64 assembly and is designed to provide unparalleled levels of flexibility and efficiency.

Operating Systems, Assembly Language, Exokernels

138 points by tosh 39 days ago | 47 comments

Writing assembly language subroutines for Extended Color BASIC (conman.org)
The ongoing saga of a programmer who doesn't live in Boston, nor does he even like Boston, but yet named his weblog/journal “The Boston Diaries.”

Programming, Assembly Language, BASIC, Subroutines, Retrocomputing

20 points by ingve 52 days ago | 5 comments

AI Models for Decompiling Assembly Code (reveng.ai)
The challenge of converting low-level assembly code back into human-readable source code is a cornerstone problem in reverse engineering.

Reverse Engineering, Artificial Intelligence, Programming, Software, Assembly Language

9 points by rrampage 62 days ago | 0 comments

Assembly Optimization Tips by Mark Larson (2004) (masm32.com)
The most important thing to remember is to TIME your code. Trying different tricks might or might not speed up your code. So it is very important to time your code to see if you do get a speedup as you try each trick.

Assembly Language, Optimization, Programming, Performance, Software Development

48 points by htfy96 68 days ago | 19 comments

A 94x speed improvement demonstrated using handwritten assembly (twitter.com)

Assembly Language, Performance Optimization, Software Engineering

93 points by doener 75 days ago | 94 comments

FFmpeg: A 94x speed improvement demonstrated using handwritten assembly (twitter.com)

FFmpeg, Optimization, Assembly Language, Performance

12 points by thunderbong 75 days ago | 4 comments

Why those particular integer multiplies? (wordpress.com)
The x86 instruction set has a somewhat peculiar set of SIMD integer multiply operations, and Intel’s particular implementation of several of these operations in their headline core designs has certain idiosyncrasies that have been there for literally over 25 years at this point.

Computer Architecture, Optimization, Assembly Language

75 points by luu 84 days ago | 37 comments

LibLISA – Instruction Discovery and Analysis on x86-64 (liblisa.nl)
libLISA is a tool that can fully automatically scan instruction space, discover instructions and synthesize their semantics.

Computer Science, Programming, Security, Reverse Engineering, Assembly Language

85 points by Luc 86 days ago | 17 comments

A C++ Developer Learns Assembly (deadbeef.io)
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C++, Assembly Language, Programming Languages

51 points by rjinman 107 days ago | 14 comments

tolower() small string performance (dotat.at)
When processing very small string fragments, what is the cross-over point between scalar code and AVX-512 with masked loads and stores?

Performance Optimization, String Manipulation, Assembly Language, .NET

3 points by jmillikin 108 days ago | 0 comments

A "hello world" program in machine code on DOS (uninformativ.de)

Programming, Operating Systems, DOS, Assembly Language, Low-Level Programming

24 points by zdw 111 days ago | 13 comments

Implementing and Detecting Anti-Debugging with Fork() (netlify.app)
As I continue my journey into reverse engineering macOS and iOS applications, I’m currently focusing on ARM assembly. I’m also working on a follow-up to my previous post on reverse engineering. In this next post, I’ll be tackling the challenge of cracking a macOS app’s license, and since I’ll be dealing with a release build, assembly language will be essential.

Reverse Engineering, macOS, iOS, Assembly Language, Security

58 points by tonygo 117 days ago | 15 comments

Compiling to Assembly from Scratch (keleshev.com)
Have you been trying to learn how compilers and programming languages work?

Programming, Compilers, Assembly Language

133 points by AlexeyBrin 118 days ago | 49 comments

A Friendly Introduction to Assembly for High-Level Programmers (shikaan.github.io)
Coming from JavaScript, Rust, C, or any other high-level language, looking at assembly snippets can be confusing or even scary.

Assembly Language, Programming, High-Level Languages

286 points by shikaan 122 days ago | 60 comments

Writing a Lisp compiler (Lisp to assembly) from scratch in JavaScript (2018) (eatonphil.com)
In this post we'll write a simple compiler in Javascript (on Node) without any third-party libraries. Our goal is to take an input program like (+ 1 (+ 2 3)) and produce an output assembly program that does these operations to produce 6 as the exit code. The resulting compiler can be found here.

Programming, Compilers, JavaScript, Assembly Language

71 points by selvan 128 days ago | 6 comments

SectorC: A C Compiler in 512 bytes (2023) (xorvoid.com)
SectorC (github) is a C compiler written in x86-16 assembly that fits within the 512 byte boot sector of an x86 machine. It supports a subset of C that is large enough to write real and interesting programs. It is quite likely the smallest C compiler ever written.

C Compilers, Programming, Assembly Language, Computer Science, Retro Computing

7 points by fanf2 129 days ago | 1 comments

Assembly Instruction: Halt and Catch Fire (HCF) (wikipedia.org)

Assembly Language, Computer Architecture, Programming

6 points by ecstrema 153 days ago | 1 comments

Converting ASCII strings to lower case at crazy speeds with AVX-512 (lemire.me)

Optimization, Performance, Assembly Language, C++, Strings

11 points by usdogu 167 days ago | 4 comments

A FORTH compiler tutorial in x86 asm (2009) (annexia.org)

FORTH, Assembly Language, Programming, Tutorials

10 points by marcopolo 205 days ago | 0 comments

Hello world in C inline assembly (2018) (jameshfisher.com)