Individual skill

assembly-arm

Use when reading or writing AArch64 or AArch32 Thumb assembly, inline asm in C, AAPCS64 register roles, or NEON and SVE vector code. Not for ABI detail across ISAs: use abi-and-calling-conventions.

.devin/skills/assembly-arm/SKILL.md

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Last checked: Nov 4, 2026

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Repository stars (not skill ratings): 55
Repository last updated: Sep 28, 2026
License: Apache-2.0

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# ARM and AArch64 assembly

AArch64 has 31 general 64-bit registers, a clean load-store instruction set, and per-core SIMD through NEON. This skill reads compiler output and writes correct inline asm for it.

## Contract

| Field | Bound contract |
|---|---|
| Trigger | The task reads GCC or Clang AArch64 output, writes inline asm or standalone assembly, decodes AAPCS64 register roles, or writes NEON intrinsics or SVE kernels. |
| Authority | Read-only. The skill explains, drafts, and annotates assembly; edits land in the user's source through the normal coding path. No remote mutation. |
| Side effect | None. Output is analysis and drafted code in chat. |
| Done | The drafted assembly assembles for the named target, or the compiler output under discussion is explained register by register. |

## Inputs