ARM/ARM64 Assembly grammar for Tree-sitter

A Tree-sitter grammar for ARM and ARM64 assembly language (GNU Assembler syntax).

Features

Supported Architectures

• ARM32: r0-r15 registers, standard ARM instruction set
• ARM64: x0-x30, w0-w30 registers, AArch64 instruction set
• SIMD/FP: v0-v31, q0-q31, d0-d31, s0-s31 registers
• Special registers: sp, lr, pc, fp, ip, xzr, wzr

Comment Styles

• @
  - ARM line comments (highest priority)
• #
  - Line comments (lower priority, allows
  #
  in immediate values)
• /* */
  - C-style block comments
• //
  - C++ style comments

Immediate Values

• #
  prefix for immediate values (e.g.,
  #0
  ,
  #0xff
  ,
  #-40
  )
• Supports decimal, hexadecimal (
  0x
  ), octal (
  0
  ), and binary (
  0b
  ) formats
• High priority parsing ensures
  #
  in operands is recognized as immediate value, not comment

Memory Addressing

• Square bracket syntax:
  [r1]
  ,
  [x1]
• With offset:
  [sp, #80]
  ,
  [x29, #-40]
• Apple ARM64 addressing:
  adrp x0, symbol@PAGE
  and
  add x0, x0, symbol@PAGEOFF

Directives

• All standard GNU as directives (
  .global
  ,
  .section
  ,
  .ascii
  ,
  .asciz
  , etc.)

Installation for Helix Editor

Add to your

Then run:

Testing

Run tests with:

Examples

ARM32

ARM64

Apple ARM64

Related Projects

For x86/x86-64 assembly, see tree-sitter-gas.