A.5.125 INVD: Invalidate Internal Caches
INVD ; 0F 08 [486]
INVD invalidates and empties the processor's internal caches, and causes
the processor to instruct external caches to do the same. It does not
write the contents of the caches back to memory first: any modified
data held in the caches will be lost. To write the data back first, use
WBINVD (section A.5.328).