Control Flow Prediction Restriction by Context prevents control flow predictions that predict execution addresses, based on information gathered from earlier execution within a particular execution context, from allowing later speculative execution within that context to be observable through side-channels.
For more information, see CFP RCTX, Control Flow Prediction Restriction by Context.
This is an alias of SYS. This means:
- The encodings in this description are named to match the encodings of SYS.
- The description of SYS gives the operational pseudocode for this instruction.
CFP RCTX, <Xt>
is equivalent to
and is always the preferred disassembly.
The description of SYS gives the operational pseudocode for this instruction.