J

1// PTO-INSTRUCTION: {"assembly":["j label"],"block":[],"catalog_indices":[306],"catalog_records":[{"asm":"j label","constraints":[],"encoding":[{"index":0,"mask":"0x0000707f","match":"0x00000037","width_bits":32}],"encoding_kind":"L32","fields":[{"name":"simm22","pieces":[{"instruction_lsb":15,"value_lsb":0,"width":17},{"instruction_lsb":7,"value_lsb":17,"width":5}],"signedness":"signed","width":22}],"form_id":"j_32_a303cf05af42","length_bits":32,"mnemonic":"J","semantic_family":"BRU","semantic_group":"BRU","semantic_handler":"JumpRelative","semantic_summary":"J - Jump to the PC-relative target.","status":"accepted"}],"classification":["bru"],"contract":{"block_composition":["none"],"canonical_assembly":["j label"],"defaults":["The selected assembly form determines which fields are present; every present field carries its encoded value and no encoded zero means omission."],"encoding_class":"standalone-encoded","examples":["j label"],"exceptions":["Reserved field encodings raise Fault_IllegalInstruction before effects; handler-specific arithmetic, memory, control-flow, system-register, and privilege faults follow the embedded normative ASL operation."],"field_contracts":{},"field_zero_meanings":{"simm22":"Encoded zero supplies numeric zero for the 22-bit signed immediate or displacement."},"legality":["Every value in each unconstrained encoded field is assigned; constrained complements are reserved and reject before effects."],"memory_effects":["none"],"operands":[{"field":"simm22","role":"22-bit signed immediate or displacement"}],"ordering":["none"],"standalone_opcode":true,"state_effects":["J - Jump to the PC-relative target.","After decode and legality checks, execute the normative JumpRelative ASL handler; no other architectural state is modified."]},"depends_on":["PTO-BLOCK-MODEL-SCHEMA-PROFILE-ENCODING"],"id":"PTO-SCALAR-J","mnemonic":"J","summary":"J - Jump to the PC-relative target.","surface":"scalar"}2// PTO-REVIEW: {"review_method":"formal-definition-read","outcome":"FORMAL-COMPLETE","reviewed_fields":["assembly","encoding","defaults","operation","state","memory","ordering","faults","reserved"]}3// NDF-BEGIN: PTO-J-DECISION-BINDING-0014// ndf: kind=contract level=L1 layer=scalar status=accepted5// J MUST implement the mnemonic-local canonical assembly, encoded6// legality, defaults, state and memory effects, ordering, and fault boundaries7// declared in this owner. The operation region below is the executable binding8// for every accepted decision that names this mnemonic.9// NDF-END: PTO-J-DECISION-BINDING-00110// DOC-BEGIN: decode11readonly func InstructionContractOperation_J() => ScalarOperation12begin13    return ScalarOperation_J;14end;15// DOC-END: decode16// DOC-BEGIN: operation17readonly func InstructionContractHandler_J() => ScalarSemanticHandler18begin19    return ScalarHandler_JumpRelative;20end;21
22pure func InstructionContractUsesCurrentPC_J()23    => boolean24begin25    return TRUE;26end;27
28pure func InstructionContractTarget_J(29    current_pc: Word,30    halfword_offset: Word)31    => Word32begin33    return current_pc + LSL(halfword_offset, 1);34end;35// DOC-END: operation36