PFALSE Set all predicate elements to false Set all elements in the destination predicate to false. For programmer convenience, an assembler must also accept predicate-as-counter register name for the destination predicate register. Green False True 0 0 1 0 0 1 0 1 0 0 0 1 1 0 0 0 1 1 1 0 0 1 0 0 0 0 0 0 PFALSE <Pd>.B if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer d = UInt(Pd); <Pd> Is the name of the destination scalable predicate register, encoded in the "Pd" field. CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; P[d, PL] = Zeros(PL);