SSRGET

assembly

[
  "ssrget SSR_ID, ->{t, u, Rd}"
]

block

[]

catalog_indices

[
  433
]

catalog_records

[
  {
    "asm": "ssrget SSR_ID, ->{t, u, Rd}",
    "constraints": [],
    "encoding": [
      {
        "index": 0,
        "mask": "0x000ff07f",
        "match": "0x0000003b",
        "width_bits": 32
      }
    ],
    "encoding_kind": "L32",
    "fields": [
      {
        "name": "RegDst",
        "pieces": [
          {
            "instruction_lsb": 7,
            "value_lsb": 0,
            "width": 5
          }
        ],
        "signedness": "encoding-defined",
        "width": 5
      },
      {
        "name": "SSR_ID",
        "pieces": [
          {
            "instruction_lsb": 20,
            "value_lsb": 0,
            "width": 12
          }
        ],
        "signedness": "encoding-defined",
        "width": 12
      }
    ],
    "form_id": "ssrget_32_959957ab6b75",
    "length_bits": 32,
    "mnemonic": "SSRGET",
    "semantic_family": "SYS",
    "semantic_group": "SYS",
    "semantic_handler": "ExecuteSystemRegisterGet",
    "semantic_summary": "SSRGET reads the complete encoded system-register address.",
    "status": "accepted"
  }
]

classification

[
  "sys"
]

contract

{
  "block_composition": [
    "SSRGET executes as one scalar operation in the body of an active SYS block."
  ],
  "canonical_assembly": [
    "ssrget SSR_ID, ->{t, u, Rd}"
  ],
  "defaults": [
    "Every displayed operand is encoded explicitly. Encoded zero is an assigned value and never denotes omission."
  ],
  "encoding_class": "standalone-encoded",
  "examples": [
    "ssrget SSR_ID, ->{t, u, Rd}"
  ],
  "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": {
    "RegDst": "Encoded zero names the architectural zero GPR.",
    "SSR_ID": "Encoded zero selects value zero of the system-register identifier."
  },
  "legality": [
    "Every fixed bit and explicit field constraint is checked before operation semantics.",
    "The complete encoded address is checked against its RO, WO, RW, unknown-address, and current-ACR access rules before effects."
  ],
  "memory_effects": [
    "none"
  ],
  "operands": [
    {
      "field": "RegDst",
      "role": "Reg5 destination: discard, R1..R23, push U, or push T"
    },
    {
      "field": "SSR_ID",
      "role": "system-register identifier"
    }
  ],
  "ordering": [
    "Check block placement and encoded legality before source reads or architectural effects.",
    "Snapshot every scalar source before the selected system effect, then advance TPC only after success."
  ],
  "standalone_opcode": true,
  "state_effects": [
    "Read the complete XLEN system-register value and publish it through the common Reg5 destination mapping.",
    "A rejected read preserves the destination and queue state except for ordinary trap entry."
  ]
}

depends_on

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

id

PTO-SCALAR-SSRGET

mnemonic

SSRGET

summary

SSRGET reads the complete encoded system-register address.

surface

scalar

{
  "classification": [
    "sys"
  ],
  "documentation": "docs/scalar/sys/SSRGET.md",
  "id": "PTO-SCALAR-SSRGET",
  "instruction_contract": {
    "artifact": "spec/evidence/instruction-contract-closure.json",
    "mnemonic": "SSRGET",
    "ndf_clause": "PTO-INST-SCALAR-SSRGET"
  },
  "mnemonic": "SSRGET",
  "readiness_subjects": [
    "ADR-0003",
    "ADR-0018",
    "ADR-0031",
    "ADR-0059",
    "ADR-0084"
  ],
  "semantic_tests": [
    "PTO-AVS-SYS-SSRGET-ACCESS-001",
    "PTO-AVS-SYS-SSRGET-DISCARD-001",
    "PTO-AVS-SYS-SSRGET-EXEC-001",
    "PTO-AVS-SYS-SSRGET-PLACE-001",
    "PTO-AVS-SYS-SSRGET-RING-001",
    "PTO-AVS-SYS-SSRGET-TDST-001",
    "PTO-AVS-SYS-SSRGET-UDST-001",
    "PTO-AVS-SYS-SSRGET-UNKNOWN-001"
  ],
  "source": "asl/scalar/sys/SSRGET.asl",
  "surface": "scalar",
  "tests": [
    "PTO-AVS-SCALAR-SSRGET-DECODE-001",
    "PTO-AVS-SYS-SSRGET-ACCESS-001",
    "PTO-AVS-SYS-SSRGET-DISCARD-001",
    "PTO-AVS-SYS-SSRGET-EXEC-001",
    "PTO-AVS-SYS-SSRGET-PLACE-001",
    "PTO-AVS-SYS-SSRGET-RING-001",
    "PTO-AVS-SYS-SSRGET-TDST-001",
    "PTO-AVS-SYS-SSRGET-UDST-001",
    "PTO-AVS-SYS-SSRGET-UNKNOWN-001"
  ]
}