# yasm/yasm

Yasm Assembler mainline development tree

Repository: https://github.com/yasm/yasm
Canonical: https://ross.abutalabs.com/products/yasm
Homepage: http://yasm.tortall.net/
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-08-01T15:57:00+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 95, release rhythm 8, longevity 100
- inputs: {"age_days": 5667, "days_push": 32, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1480, forks 293 (observed 2026-08-28T04:04:50.558714+00:00)

## What it is
Yasm is a modular assembler, a complete rewrite of NASM under the BSD license, supporting x86 and AMD64 instruction sets with NASM and GAS syntaxes. It outputs many object formats (ELF, Mach-O, COFF/Win32/Win64, binary) and generates STABS, DWARF 2, and CodeView debug information.

## Use cases
- assemble x86 or amd64 assembly code
- nasm-compatible assembler with a permissive license
- assemble NASM or GAS syntax into Win32/Win64 object files for Visual Studio
- generate ELF64 or Mach-O object files from assembly
- produce DWARF debug info for assembly code

## When to choose
- you need a NASM-compatible assembler with BSD licensing
- you target multiple object formats or debug info standards from assembly
- you integrate assembly builds into Visual Studio projects

## When to avoid
- you need assemblers for non-x86 architectures like ARM or RISC-V
- you want a modern actively evolving assembler with new instruction set support
- you prefer GNU as with GCC toolchain integration

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: compiler, developer-tools, cli
- domain: developer-tools, compilers, operating-systems
- platform: windows, cross-platform, cli
- tags: assembler, nasm, x86, amd64, assembly-language, elf, mach-o, dwarf, linux, macos

## Member repositories
- yasm/yasm (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:50.558714+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:34:16.624729+00:00, confidence not recorded.
  - readme: https://github.com/yasm/yasm (fetched 2026-08-28T04:04:50.558714+00:00, sha 713c8c0c0dab)
- Data as of 2026-08-30T08:39:29.467469+00:00.