SETFFR

Initialise the first-fault register to all true

Initialise the first-fault register (FFR) to all true prior to a sequence of first-fault or non-fault loads. This instruction is unpredicated.

This instruction is illegal when executed in Streaming SVE mode, unless FEAT_SME_FA64 is implemented and enabled at the current Exception level.

313029282726252423222120191817161514131211109876543210
00100101001011001001000000000000

SETFFR

if !HaveSVE() then UNDEFINED;

Operation

CheckNonStreamingSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; FFR[PL] = Ones(PL);

Operational information

If FEAT_SVE2 is implemented or FEAT_SME is implemented, then when PSTATE.DIT is 1:


Internal version only: isa v33.53, AdvSIMD v29.11, pseudocode v2022-09_rel, sve v2022-09_rel ; Build timestamp: 2022-09-30T16:37

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