Liangxu Linux

Jul 7, 2024 · Fundamentals

Why Structs Beat Global Variables on Cortex‑A9: A Deep Dive into Assembly Efficiency

The article explains how encapsulating peripheral registers in a struct rather than using separate global variables reduces literal‑pool usage, cuts instruction count, and improves execution speed on Cortex‑A9, providing step‑by‑step assembly analysis, compilation commands, and further optimization techniques.