SSRSET

assembly

[
  "ssrset SrcL, SSR_ID"
]

block

[]

catalog_indices

[
  434
]

catalog_records

[
  {
    "asm": "ssrset SrcL, SSR_ID",
    "constraints": [],
    "encoding": [
      {
        "index": 0,
        "mask": "0x00007fff",
        "match": "0x0000103b",
        "width_bits": 32
      }
    ],
    "encoding_kind": "L32",
    "fields": [
      {
        "name": "SSR_ID",
        "pieces": [
          {
            "instruction_lsb": 20,
            "value_lsb": 0,
            "width": 12
          }
        ],
        "signedness": "encoding-defined",
        "width": 12
      },
      {
        "name": "SrcL",
        "pieces": [
          {
            "instruction_lsb": 15,
            "value_lsb": 0,
            "width": 5
          }
        ],
        "signedness": "encoding-defined",
        "width": 5
      }
    ],
    "form_id": "ssrset_32_4dd3b71802c6",
    "length_bits": 32,
    "mnemonic": "SSRSET",
    "semantic_family": "SYS",
    "semantic_group": "SYS",
    "semantic_handler": "ExecuteSystemRegisterSet",
    "semantic_summary": "SSRSET writes the complete encoded system-register address.",
    "status": "accepted"
  }
]

classification

[
  "sys"
]

contract

{
  "block_composition": [
    "SSRSET executes as one scalar operation in the body of an active SYS block."
  ],
  "canonical_assembly": [
    "ssrset SrcL, SSR_ID"
  ],
  "defaults": [
    "Every displayed operand is encoded explicitly. Encoded zero is an assigned value and never denotes omission."
  ],
  "encoding_class": "standalone-encoded",
  "examples": [
    "ssrset SrcL, SSR_ID"
  ],
  "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": {
    "SSR_ID": "Encoded zero selects value zero of the system-register identifier.",
    "SrcL": "Encoded zero names the architectural zero GPR."
  },
  "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": "SSR_ID",
      "role": "system-register identifier"
    },
    {
      "field": "SrcL",
      "role": "Reg5 source: R0..R23, T#1..T#4, or U#1..U#4"
    }
  ],
  "ordering": [
    "Preflight the complete address, current-ACR permission, and writable access class before reading SrcL.",
    "Snapshot SrcL, perform the register write, and then advance TPC."
  ],
  "standalone_opcode": true,
  "state_effects": [
    "Write the complete XLEN source to the selected writable system register.",
    "A rejected write preserves the source and target register except for ordinary trap entry."
  ]
}

depends_on

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

id

PTO-SCALAR-SSRSET

mnemonic

SSRSET

summary

SSRSET writes the complete encoded system-register address.

surface

scalar

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