C.SLLI

assembly

[
  "c.slli t#1, uimm, ->t"
]

block

[]

catalog_indices

[
  42
]

catalog_records

[
  {
    "asm": "c.slli t#1, uimm, ->t",
    "constraints": [],
    "encoding": [
      {
        "index": 0,
        "mask": "0xf83f",
        "match": "0x102c",
        "width_bits": 16
      }
    ],
    "encoding_kind": "C16",
    "fields": [
      {
        "name": "uimm5",
        "pieces": [
          {
            "instruction_lsb": 6,
            "value_lsb": 0,
            "width": 5
          }
        ],
        "signedness": "unsigned",
        "width": 5
      }
    ],
    "form_id": "c_slli_16_958a14dc4058",
    "length_bits": 16,
    "mnemonic": "C.SLLI",
    "semantic_family": "ALU",
    "semantic_group": "ALU",
    "semantic_handler": "ScalarBinary",
    "semantic_summary": "C.SLLI snapshots the pre-instruction T#1 value, logically shifts it left by uimm5, and pushes the XLEN result to T.",
    "status": "accepted"
  }
]

classification

[
  "alu"
]

contract

{
  "block_composition": [
    "none"
  ],
  "canonical_assembly": [
    "c.slli t#1, uimm, ->t"
  ],
  "defaults": [
    "T#1 is the fixed source and T is the fixed destination; neither is encoded or omittable in canonical assembly.",
    "uimm5 is required and directly encodes a shift amount from 0 through 31."
  ],
  "encoding_class": "standalone-encoded",
  "examples": [
    "c.slli t#1, 31, ->t"
  ],
  "exceptions": [
    "The logical shift is total and raises no arithmetic exception.",
    "If T#1 is unavailable, Fault_IllegalInstruction is raised before the T push, before TPC advances, and before any other effect."
  ],
  "field_contracts": {},
  "field_zero_meanings": {
    "uimm5": "Encoded zero republishes the unchanged pre-instruction T#1 value."
  },
  "legality": [
    "Every uimm5 value 0..31 is assigned. Fixed encoding bits must match the canonical form.",
    "The fixed T#1 source must be initialized before execution."
  ],
  "memory_effects": [
    "none"
  ],
  "operands": [
    {
      "field": "uimm5",
      "role": "unsigned five-bit logical left-shift amount"
    }
  ],
  "ordering": [
    "Snapshot old T#1 before the destination push, so the instruction cannot read its own result.",
    "Push the shifted result as the newest T entry, then advance TPC by two bytes."
  ],
  "standalone_opcode": true,
  "state_effects": [
    "Logically shift the complete XLEN old T#1 value left by UInt(uimm5); shifted-out bits are discarded and vacated bits are zero-filled.",
    "Push exactly one XLEN result to T. Existing T entries shift toward older indices and the former T#4 is discarded.",
    "No GPR, U queue, memory, reservation, descriptor, numeric-status, block, privilege, predicate, or other control state changes. Successful execution advances TPC by two bytes."
  ]
}

depends_on

[
  "PTO-BLOCK-MODEL-SCHEMA-PROFILE-ENCODING"
]

id

PTO-SCALAR-C-SLLI

mnemonic

C.SLLI

summary

C.SLLI snapshots the pre-instruction T#1 value, logically shifts it left by uimm5, and pushes the XLEN result to T.

surface

scalar

{
  "classification": [
    "alu"
  ],
  "documentation": "docs/scalar/alu/C.SLLI.md",
  "id": "PTO-SCALAR-C-SLLI",
  "instruction_contract": {
    "artifact": "spec/evidence/instruction-contract-closure.json",
    "mnemonic": "C.SLLI",
    "ndf_clause": "PTO-INST-SCALAR-C-SLLI"
  },
  "mnemonic": "C.SLLI",
  "readiness_subjects": [
    "ADR-0026",
    "ADR-0059"
  ],
  "semantic_tests": [
    "PTO-AVS-SCALAR-C-SLLI-QUEUE-001",
    "PTO-AVS-SCALAR-C-SLLI-READINESS-001"
  ],
  "source": "asl/scalar/alu/C.SLLI.asl",
  "surface": "scalar",
  "tests": [
    "PTO-AVS-SCALAR-C-SLLI-DECODE-001",
    "PTO-AVS-SCALAR-C-SLLI-QUEUE-001",
    "PTO-AVS-SCALAR-C-SLLI-READINESS-001"
  ]
}