BTI Branch target identification This instruction is used to guard against the execution of instructions that are not the intended target of a branch. Outside of a guarded memory region, a BTI instruction executes as a NOP. Within a guarded memory region, while PSTATE.BTYPE != 0b00, a BTI instruction compatible with the current value of PSTATE.BTYPE will not generate a Branch Target Exception and will allow execution of subsequent instructions within the memory region. For more information, see PSTATE.BTYPE. The operand <targets> passed to a BTI instruction determines the values of PSTATE.BTYPE that the BTI instruction is compatible with. 1 1 0 1 0 1 0 1 0 0 0 0 0 0 1 1 0 0 1 0 0 1 0 0 x x 0 1 1 1 1 1 BTI {<targets>} if !IsFeatureImplemented(FEAT_BTI) then EndOfDecode(Decode_NOP); end; // Check branch target compatibility between BTI instruction and PSTATE.BTYPE SetBTypeCompatible(BTypeCompatible_BTI(op2[2:1])); <targets> Is the type of indirection, op2[2:1] <targets> 00 [absent] 01 c 10 j 11 jc SetBTypeNext('00'); 2026-03-12 12:23:09 2025-09_rel_asl1