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runtime: Add Ice Lake and Sapphire Rapids ERMS support for memmove #66959

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@cocotyty cocotyty commented Apr 22, 2024

The current memmove implementation uses REP MOVSB to copy data larger than 2KB when the useAVXmemmove global variable is false and the CPU supports the ERMS feature.

This feature is currently only enabled on CPUs in the Sandy Bridge (Client), Sandy Bridge (Server), Ivy Bridge (Client), and Ivy Bridge (Server) microarchitectures.

For modern Intel CPU microarchitectures that support the ERMS feature, such as Ice Lake (Server), Sapphire Rapids , REP MOVSB achieves better performance than the AVX-based copy currently implemented in memmove.

Fixes #66958

Signed-off-by: TangYang <yang.tang@intel.com>
@cocotyty cocotyty changed the title Add Ice Lake and Sapphire Rapids ERMS support runtime: Add Ice Lake and Sapphire Rapids ERMS support for memmove Apr 22, 2024
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runtime: memmove should use the REP MOVSB instruction on newer Intel microarchitectures.
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