this post was submitted on 15 May 2025

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Tell me the truth ... (piefed.jeena.net)

submitted 2 days ago by [email protected] to c/programmer_humor

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[–] [email protected] 10 points 2 days ago

ARM has bit-banding specifically for this. I think it’s limited to M-profile CPUs (e.g. v7-M) but I’ve definitely used this before. It basically creates a 4-byte virtual address for every bit in a region. So the CPU itself can’t “address” a bit but it can access an address backed by only 1 bit of SRAM or registers (this is also useful to atomically access certain bits in registers without needing to use SW atomics).