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Data Value Prediction Restriction by Context prevents data value predictions, that predict execution addresses based on information gathered from earlier execution within aan particular execution context. Data value predictions determined by the actions of code in the target execution context, orfrom contextsallowing appearinglater in program order before the instruction cannot be used to exploitatively control speculative execution occurringwithin afterthat thecontext instructionto isbe completeobservable andthrough synchronized.side-channels.
For more information, see DVP RCTX, Data Value Prediction Restriction by Context.
This is an alias of SYS. This means:
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | Rt | ||||
L | op1 | CRn | CRm | op2 |
The description of SYS gives the operational pseudocode for this instruction.
Internal version only: isa v32.15v32.13, AdvSIMD v29.05, pseudocode v2021-03v2020-12, sve v2021-03_rc2v2020-12
; Build timestamp: 2021-03-30T212021-03-05T20:2214
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