PSEL

Predicate select between predicate register or all-false

This instruction places the contents of the first source predicate register into the destination predicate register if the indexed element of the second source predicate is true, otherwise it sets the destination predicate to all-false. The indexed element is determined by the sum of a general-purpose index register and an immediate, modulo the number of elements. This instruction does not set the condition flags. For programmer convenience, an assembler must also accept predicate-as-counter register names for the destination predicate register and the first source predicate register.

SVE2
(FEAT_SME || FEAT_SVE2p1)

Decode for this encoding

if !IsFeatureImplemented(FEAT_SME) && !IsFeatureImplemented(FEAT_SVE2p1) then EndOfDecode(Decode_UNDEF); end; let imm5 : bits(5) = i1::tszh::tszl; var esize : integer; var imm : integer; case tszh::tszl of when '0000' => EndOfDecode(Decode_UNDEF); when '1000' => esize = 64; imm = UInt(imm5[4]); when 'x100' => esize = 32; imm = UInt(imm5[4:3]); when 'xx10' => esize = 16; imm = UInt(imm5[4:2]); when 'xxx1' => esize = 8; imm = UInt(imm5[4:1]); end; let n : integer = UInt(Pn); let m : integer = UInt(Pm); let d : integer = UInt(Pd); let v : integer = UInt('011'::Rv);