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Nontemporal proposed semantics #8

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Nontemporal proposed semantics #8

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This adds a specification for the nontemporal access class.

The nontemporal access class has two primary behaviours:

  • Hints that caching the value loaded/stored is unnecessary
  • Alters ordering semantics s.t. visibility wrt. other memory locations is not guaranteed (and a nontemporal fence is required in order to synchronize nontemporal operations).

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