Assembly Arm

Teaches Claude to read and write AArch64 and 32-bit ARM Thumb assembly, covering the AAPCS64 calling convention, register layout, and common instruction patterns. Shows you how to generate assembly from GCC/Clang, write inline asm with proper constraints, and work with NEON SIMD intrinsics. Includes practical examples like function prologues, atomic operations with acquire/release semantics, and reading system registers. Most useful when you're debugging compiler output, writing performance-critical code paths, or porting low-level code to ARM. The register tables and constraint reference are handy if you forget which registers are caller-saved or what the Q constraint actually means.

skills.sh installs: 707
GitHub stars: 279
last updated: Aug 21, 2026

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Install

$ npx -y skills add mohitmishra786/low-level-dev-skills --skill assembly-arm --agent claude-code

Installs into .claude/skills of the current project.

Files

ARM / AArch64 Assembly

Purpose

Guide agents through AArch64 (64-bit) and ARM (32-bit Thumb) assembly: registers, calling conventions, inline asm, and NEON/SVE SIMD patterns.

Triggers

"How do I read ARM64 assembly output?"
"What are the AArch64 registers and calling convention?"
"How do I write inline asm for ARM?"
"What is the difference between AArch64 and ARM Thumb?"
"How do I use NEON intrinsics?"

Workflow

1. Generate ARM assembly

# AArch64 (native or cross-compile)
aarch64-linux-gnu-gcc -S -O2 foo.c -o foo.s

# 32-bit ARM Thumb
arm-linux-gnueabihf-gcc -S -O2 -mthumb foo.c -o foo.s

# From objdump
aarch64-linux-gnu-objdump -d -S prog

# From GDB on target
(gdb) disassemble /s main