area-CodeGen-coreclrenhancementhelp wanted
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Descrizione
At present, RMW semantics is tracked via a combination of the compiler support for VEX-encoded instructions and the NoRMWSemantics flag.
We should update this to instead be a combination of flags: RMWSemanticsSseOnly and RMWSemanticsAlways (or similar).
This will allow all scenarios to be table driven and for the check to be a positive case, rather than a negative case (which can sometimes lead to confusion).
category:implementation theme:hardware-intrinsics skill-level:intermediate cost:small