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MrFuchs
searching PlanetScale…
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by
MrFuchs
4y ago
Indeed, only one port supports the corresponding instruction on Intel CPUs.
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MrFuchs
4y ago
From the port usage reported at https://uops.info/html-instr/CRC32_R64_R64.html , we can conclude (B) for the Intel microarchitectures. For AMD it's not entirely obvious, but I agree (B) appears more likely.