ACRC

assembly

[
  "acrc rst_type"
]

block

[]

catalog_indices

[
  0
]

catalog_records

[
  {
    "asm": "acrc rst_type",
    "constraints": [],
    "encoding": [
      {
        "index": 0,
        "mask": "0xff0fffff",
        "match": "0x0000302b",
        "width_bits": 32
      }
    ],
    "encoding_kind": "L32",
    "fields": [
      {
        "name": "RST_Type",
        "pieces": [
          {
            "instruction_lsb": 20,
            "value_lsb": 0,
            "width": 4
          }
        ],
        "signedness": "encoding-defined",
        "width": 4
      }
    ],
    "form_id": "acrc_32_a9c0e33f9904",
    "length_bits": 32,
    "mnemonic": "ACRC",
    "semantic_family": "SYS",
    "semantic_group": "SYS",
    "semantic_handler": "ArchitectureCloseRequest",
    "semantic_summary": "ACRC requests context close and marks the final scalar position of the active SYS block.",
    "status": "accepted"
  }
]

classification

[
  "sys"
]

contract

{
  "block_composition": [
    "ACRC executes as one scalar operation in the body of an active SYS block."
  ],
  "canonical_assembly": [
    "acrc rst_type"
  ],
  "defaults": [
    "Every displayed operand is encoded explicitly. Encoded zero is an assigned value and never denotes omission."
  ],
  "encoding_class": "standalone-encoded",
  "examples": [
    "acrc rst_type"
  ],
  "exceptions": [
    "Invalid block placement raises Illegal Block Exception before encoded-field legality or effects.",
    "A reserved encoding or rejected access raises Illegal Instruction before destination, queue, system-state, or TPC effects."
  ],
  "field_contracts": {},
  "field_zero_meanings": {
    "RST_Type": "Encoded zero selects value zero of the return-stack record type."
  },
  "legality": [
    "Every fixed bit and explicit field constraint is checked before operation semantics.",
    "All four-bit request values are encoded; manager routing and current-ACR permission determine instruction-local acceptance."
  ],
  "memory_effects": [
    "none"
  ],
  "operands": [
    {
      "field": "RST_Type",
      "role": "return-stack record type"
    }
  ],
  "ordering": [
    "Preflight request routing before setting the terminal marker or entering the service-request trap.",
    "On permission success, set the SYS terminal marker before trap entry so recovery preserves the final-position rule."
  ],
  "standalone_opcode": true,
  "state_effects": [
    "A permitted request publishes the service-request trap, request type, and architecture-request epoch.",
    "After recovery, only BSTOP or a following BSTART may commit the block; another instruction raises Illegal Block Exception before effects."
  ]
}

depends_on

[
  "PTO-SCALAR-MODEL-SYS-SEMANTICS"
]

id

PTO-SCALAR-ACRC

mnemonic

ACRC

summary

ACRC requests context close and marks the final scalar position of the active SYS block.

surface

scalar

{
  "classification": [
    "sys"
  ],
  "documentation": "docs/scalar/sys/ACRC.md",
  "id": "PTO-SCALAR-ACRC",
  "instruction_contract": {
    "artifact": "spec/evidence/instruction-contract-closure.json",
    "mnemonic": "ACRC",
    "ndf_clause": "PTO-INST-SCALAR-ACRC"
  },
  "mnemonic": "ACRC",
  "readiness_subjects": [
    "ADR-0012",
    "ADR-0018",
    "ADR-0031",
    "ADR-0059",
    "ADR-0084"
  ],
  "semantic_tests": [
    "PTO-AVS-SYS-ACRC-EXEC-001",
    "PTO-AVS-SYS-ACRC-PLACE-001",
    "PTO-AVS-SYS-ACRC-REQUEST-001",
    "PTO-AVS-SYS-ACRC-RING0-001",
    "PTO-AVS-SYS-ACRC-RING1-001",
    "PTO-AVS-SYS-ACRC-TERMINAL-001"
  ],
  "source": "asl/scalar/sys/ACRC.asl",
  "surface": "scalar",
  "tests": [
    "PTO-AVS-SCALAR-ACRC-DECODE-001",
    "PTO-AVS-SYS-ACRC-EXEC-001",
    "PTO-AVS-SYS-ACRC-PLACE-001",
    "PTO-AVS-SYS-ACRC-REQUEST-001",
    "PTO-AVS-SYS-ACRC-RING0-001",
    "PTO-AVS-SYS-ACRC-RING1-001",
    "PTO-AVS-SYS-ACRC-TERMINAL-001"
  ]
}