RET Return from subroutine This instruction branches unconditionally to an address in a register. This instruction provides a hint that this is a subroutine return. 1 1 0 1 0 1 1 0 0 1 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 RET {<Xn>} let n : integer{} = UInt(Rn); <Xn> Is the 64-bit name of the general-purpose register holding the address to be branched to, encoded in the "Rn" field. Defaults to X30 if absent. var target : bits(64) = X{}(n); if IsFeatureImplemented(FEAT_GCS) && GCSPCREnabled(PSTATE.EL) then target = LoadCheckGCSRecord(target, GCSInstType_PRET); SetCurrentGCSPointer(GetCurrentGCSPointer() + 8); end; // Value in BTypeNext will be used to set PSTATE.BTYPE BTypeNext = '00'; let branch_conditional : boolean = FALSE; BranchTo{64}(target, BranchType_RET, branch_conditional); 2026-03-26 20:27:25 2026-03_rel