HLT

Halt instruction

This instruction can generate a Halt Instruction debug event, which causes entry into Debug state.

Within a guarded memory region, while PSTATE.BTYPE != 0b00, an HLT instruction that would cause entry into Debug state will not generate a Branch Target exception and will cause entry into Debug state as normal. For more information, see PSTATE.BTYPE.

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
1	1	0	1	0	1	0	0	0	1	0	imm16																0	0	0	0	0
								opc																			op2			LL

Encoding

HLT #<imm>

Decode for this encoding

if EDSCR.HDE == '0' || !HaltingAllowed() then EndOfDecode(Decode_UNDEF); elsif IsFeatureImplemented(FEAT_BTI) then SetBTypeCompatible(TRUE);

Assembler Symbols

<imm>

Is a 16-bit unsigned immediate, in the range 0 to 65535, encoded in the "imm16" field.

Operation

constant boolean is_async = FALSE; constant FaultRecord fault = NoFault(); Halt(DebugHalt_HaltInstruction, is_async, fault);