3 ms·
Indeed, PDP/11s don't like it. Older ARM designs too, though I believe they allow it since about ARM6 (perhaqps because x86 does?).
by hazeii 6y ago
Indeed, PDP/11s don't like it. Older ARM designs too, though I believe they allow it since about ARM6 (perhaqps because x86 does?).
- simcop2387 6y agoThe arms allow it since ARMv5, but it's still not quite what one would expect until ARMv7. However it has a significant performance penalty when doing it. https://medium.com/@iLevex/the-curious-case-of-unaligned-access-on-arm-5dd0ebe24965 https://medium.com/@iLevex/the-curious-case-of-unaligned-acc...
- elgfare 6y agoCortex-M0 still does not allow it, and fun fact: Cortex-M4 allows unaligned access, but can be configured run-time to not allow it.