## ALP Programming Guide and Reference

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### Notes

INVD should be used with care. It does not write back modified cache lines; therefore, it can cause the data cache to become inconsistent with other memories in the system. Unless there is a specific requirement or benefit to invalidate a cache without writing back the modified lines (i.e., testing or fault recovery where cache coherency with main memory is not a concern), software should use the WBINVD instruction.

This instruction is implementation-dependent; its function may be implemented differently on future Intel processors.

It is the responsibility of hardware to respond to the external cache write -back and flush indications.

This instruction is not supported on Intel386 processors. See the Intel documentation for information on detecting the processor type at runtime. See the Intel documentation for information on disabling the cache.