On Mon, 16 Nov 2020 20:58:52 +0900, Wonhyuk Yang said: > str w0, [x1] So we dirtied the cache line. > dmb sys > dc ivac, x1 // Invalidate potentially stale cache line So we invalidate it. > Is there any problem, if the dc operation precedes the store operation? If you swap them, you get... dc ivac,x1 // invalidate a cache line that's probably OK str w0,[x1 // and now we do a store that leaves a possibly stale cache line In other words, if you swap them you may leave an un-invalidated stale cache line.
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