SETFFR Initialize the first-fault register to all true This instruction initializes 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. False SM_0_only 0 0 1 0 0 1 0 1 0 0 1 0 1 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 SETFFR if !IsFeatureImplemented(FEAT_SVE) then EndOfDecode(Decode_UNDEF); end; CheckNonStreamingSVEEnabled(); let VL : integer{} = CurrentVL(); let PL : integer{} = VL DIV 8; FFR{PL}() = Ones{PL}; 2026-03-12 12:23:09 2025-09_rel_asl1