Zicbop Extension Versions 1.0.0 State ratified Ratification date 2022-05 Synopsis Cache block prefetch instruction Instructions The following instructions are affected by this extension: prefetch.i Cache block prefetch for instruction fetch prefetch.r Cache block prefetch for data read prefetch.w Cache block prefetch for data write Parameters This extension has the following implementation options (AKA parameters): CACHE_BLOCK_SIZE Type integer Valid Values 1 to 0xffffffffffffffff Description The observable size of a cache block, in bytes