WHILELO (predicate pair)

While incrementing unsigned scalar lower than scalar (pair of predicates)

This instruction generates a pair of predicates that starting from the lowest numbered element of the pair is true while the incrementing value of the first, unsigned scalar operand is lower than the second scalar operand and false thereafter up to the highest numbered element of the pair.

The full width of the scalar operands is significant for the purposes of comparison, and the full width first operand is incremented by one for each destination predicate element, irrespective of the predicate result element size. The first general-purpose source register is not itself updated.

The lower-numbered elements are placed in the first predicate destination register, and the higher-numbered elements in the second predicate destination register. This instruction sets the First (N), None (Z), and !Last (C) condition flags based on the predicate result, and sets the V flag to zero.

SVE2
(FEAT_SME2 || FEAT_SVE2p1)

Decode for this encoding

if !IsFeatureImplemented(FEAT_SME2) && !IsFeatureImplemented(FEAT_SVE2p1) then EndOfDecode(Decode_UNDEF); end; let esize : integer{} = 8 << UInt(size); let rsize : integer{} = 64; let n : integer = UInt(Rn); let m : integer = UInt(Rm); let d0 : integer = UInt(Pd::'0'); let d1 : integer = UInt(Pd::'1'); let unsigned : boolean = TRUE; let op : CmpOp = Cmp_LT;