LASTB (SIMD&FP scalar) Extract last element to SIMD&FP scalar register If there is an active element then extract the last active element from the final source vector register. If there are no active elements, extract the highest-numbered element. Then place the extracted element in the destination SIMD&FP register. Green True 0 0 0 0 0 1 0 1 1 0 0 0 1 1 1 0 0 LASTB <V><d>, <Pg>, <Zn>.<T> if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer esize = 8 << UInt(size); constant integer g = UInt(Pg); constant integer n = UInt(Zn); constant integer d = UInt(Vd); constant boolean isBefore = TRUE; <V> Is a width specifier, size <V> 00 B 01 H 10 S 11 D <d> Is the number [0-31] of the destination SIMD&FP register, encoded in the "Vd" field. <Pg> Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field. <Zn> Is the name of the source scalable vector register, encoded in the "Zn" field. <T> Is the size specifier, size <T> 00 B 01 H 10 S 11 D CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; constant integer elements = VL DIV esize; constant bits(PL) mask = P[g, PL]; constant bits(VL) operand = Z[n, VL]; integer last = LastActiveElement(mask, esize); if isBefore then if last < 0 then last = elements - 1; else last = last + 1; if last >= elements then last = 0; V[d, esize] = Elem[operand, last, esize];