pasm

about

pasm is modern and independent assembler for x86-64 architecture as one of key parts in polon toolchain.

Note

pasm will not receive new content updates from now on as development on it is finished.

Only bugfixes and minor changes will be submitted.

• matissoss, 30.07.2025

features

• Wide coverage of x86-64 ISA (1795 unique mnemonics)
• Support for SSE*, AVX, AVX2, AVX-512/AVX-10, Intel APX, x87, MMX and more x86-64 extensions
• Support for bin and 32/64-bit ELF as export target
• Very performant and optimized (~3,4x faster than GAS in some cases)

getting started

Firstly you want to download/compile pasm's binary.

Then you should read documentation (docs) and see examples (some can be currently found in tests directory).

examples

go to examples

features

Precompiled pasm binary on default ships with following features: timed, iinfo and target_all.

You can also customize few parameters in src/conf.rs.

Here is exhaustive list of features you can use:

• time: measures time it took for assembling (as a whole)
• vtime: for benchmarking
• iinfo : instruction info (stores mnemonics as strings)
• target_all: every target_*
• target_elf: elf target handling

dev roadmap

see roadmap.md

credits

pasm was brought to you by matissoss <[email protected]> under MPL 2.0 license.