PTEST Set condition flags for predicate Sets the First (N), None (Z), !Last (C) condition flags based on the predicate source register, and the V flag to zero. Green True True 0 0 1 0 0 1 0 1 0 1 0 1 0 0 0 0 1 1 0 0 0 0 0 0 PTEST <Pg>, <Pn>.B if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer esize = 8; constant integer g = UInt(Pg); constant integer n = UInt(Pn); <Pg> Is the name of the governing scalable predicate register, encoded in the "Pg" field. <Pn> Is the name of the source scalable predicate register, encoded in the "Pn" field. CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; constant bits(PL) mask = P[g, PL]; constant bits(PL) result = P[n, PL]; PSTATE.<N,Z,C,V> = PredTest(mask, result, esize);