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65579d29081cb8501e4d7f786747bf12e7b37da2
esp8266/cores
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Takayuki 'January June' Suwa 65579d2908 Make precache() cleaner and more efficient (#8903) 
No need to issue a MEMW instrunction per load from each cache line.
Only once after the last load is sufficient.

  MEMW ensures that all previous load, store, acquire, release, prefetch,
  and cache instructions perform before performing any subsequent load,
  store, acquire, release, prefetch, or cache instructions.

    -- MEMW (Memory Wait), 6. Instruction Descriptions,
                                      Xtensa ISA Reference Manual (p.409)
2023-04-06 01:26:34 +03:00
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esp8266
Make precache() cleaner and more efficient (#8903)
2023-04-06 01:26:34 +03:00