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PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE

PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE

ASL pseudocode

The complete ASL owner is shown directly below.

// PTO-UNIT: {"id":"PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE","surface":"arch","classification":["memory-model","address-space"],"depends_on":["PTO-ARCH-STATE-DEFINEDNESS"]}readonly func IsModelAddress(address: Word) => booleanbegin    return UInt(address) < PTO_MODEL_MEMORY_BYTES;end;
readonly func ReadMemoryByte(address: Word) => Bytebegin    assert IsModelAddress(address);    let index = UInt(address) as ModelAddress;    return _Memory[[index]];end;
func WriteMemoryByte(address: Word, value: Byte)begin    assert IsModelAddress(address);    let index = UInt(address) as ModelAddress;    _Memory[[index]] = value;end;

Architecture behavior

purpose scope

Purpose and scope

This unit provides the bounded byte-address access layer used by the executable memory model. It answers whether a Word address is inside the configured model and supplies byte reads and writes for valid addresses.

concepts state

Address and storage concepts

  • IsModelAddress compares UInt(address) with PTO_MODEL_MEMORY_BYTES.
  • ReadMemoryByte returns the Byte stored in _Memory at the converted model index.
  • WriteMemoryByte updates the same byte-addressed _Memory state.
rules interactions

Access sequence

Both accessors assert IsModelAddress(address) before converting the address to ModelAddress. A caller therefore establishes model-range validity before observing or changing a byte.

boundaries

Model boundary

The configured _Memory array is executable verification storage. Its size bounds the model instance; this page does not claim that every PTO implementation exposes that byte count as its architectural address space.

example usage

illustrative access example

Use this example block only as a reading aid: apply the rules above, then confirm the result in the normative ASL owner. It does not add an architectural contract.

Related owners

  • PTO-ARCH-STATE-DEFINEDNESS supplies the state foundation used by this unit.
  • Memory-event and instruction access owners build higher-level behavior on these byte helpers.

NDF clauses

Bodies come from owning ASL. Dragging or buttons change only this page-session view order.

No NDF clause is attached to this unit.

Evidence index

8 matching entries

Executable evidence1
  • PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE compiles as an independent normative unit
    1. surfaceARCH
    2. ownerPTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE
    3. categorySTATIC-INVARIANT
    4. case001
    Show exact test source
    Sources and references
    Complete stable ID
    PTO-AVS-ARCH-MEMORY-MODEL-ADDRESS-SPACE-STATIC-001
    Path
    tests/asl/arch/memory-model/address-space/arch-static-address-space-contract-001.asl
    Kind / role
    static-invariant
    Pass condition
    the complete model and this unit's static invariant compile
    SHA-256
    a7e74bf7d9cdd980710e50f02da4a461e67160e0444569f713ffc3a628a81a0e
    Open exact source ↗ for PTO-AVS-ARCH-MEMORY-MODEL-ADDRESS-SPACE-STATIC-001
Commit-scoped evidence5
  • spec/evidence/release-traceability-readiness.json · closedPTO-EVIDENCE-RELEASE-TRACEABILITY
    Sources and references
    Complete stable ID
    PTO-EVIDENCE-RELEASE-TRACEABILITY
    Path
    spec/evidence/release-traceability-readiness.json
    Kind / role
    ASL/NDF/documentation/AVS traceability
    SHA-256
    c7327021d39dc67ac5564bc55073b3870a397d79ac8d9648284d56e33bc14a3e
    Open exact source ↗ for PTO-EVIDENCE-RELEASE-TRACEABILITY
  • spec/evidence/instruction-contract-closure.json · closedPTO-EVIDENCE-INSTRUCTION-CONTRACT-CLOSURE
    Sources and references
    Complete stable ID
    PTO-EVIDENCE-INSTRUCTION-CONTRACT-CLOSURE
    Path
    spec/evidence/instruction-contract-closure.json
    Kind / role
    mnemonic and encoding contract closure
    SHA-256
    3ef2bb62421c79dff8fa77a1c7983923b523244b8090812883ef81286ca8106a
    Open exact source ↗ for PTO-EVIDENCE-INSTRUCTION-CONTRACT-CLOSURE
  • spec/evidence/architecture-readiness.json · openPTO-EVIDENCE-ARCHITECTURE-READINESS
    Sources and references
    Complete stable ID
    PTO-EVIDENCE-ARCHITECTURE-READINESS
    Path
    spec/evidence/architecture-readiness.json
    Kind / role
    architecture maturity and blockers
    SHA-256
    4b0b85199101251bea744e0f3591cc31906909dc80d5ab651c417a936036a004
    Open exact source ↗ for PTO-EVIDENCE-ARCHITECTURE-READINESS
  • spec/evidence/release-gate-readiness.json · ready-for-exact-head-verificationPTO-EVIDENCE-RELEASE-GATE-READINESS
    Sources and references
    Complete stable ID
    PTO-EVIDENCE-RELEASE-GATE-READINESS
    Path
    spec/evidence/release-gate-readiness.json
    Kind / role
    exact-head gate readiness
    SHA-256
    a0f4d2b6920c08981ea55fd8ef820708a40d4feb5402c5150e8e9ab532d84ce0
    Open exact source ↗ for PTO-EVIDENCE-RELEASE-GATE-READINESS
  • spec/release-manifest.json · draftPTO-EVIDENCE-RELEASE-MANIFEST
    Sources and references
    Complete stable ID
    PTO-EVIDENCE-RELEASE-MANIFEST
    Path
    spec/release-manifest.json
    Kind / role
    release content and encoding fingerprints
    SHA-256
    1a64c109ed7a90351c41e2a418b3c0ebaf8ad975838986d2101385186b85c0d8
    Open exact source ↗ for PTO-EVIDENCE-RELEASE-MANIFEST
Decision history2
  • PTO total store order candidate model · accepted
    1. decision recordADR
    2. case0006

    Decision record

    Loading ADR-0006…

    Sources and references
    Complete stable ID
    ADR-0006
    Path
    docs/status/decisions/0006-pto-total-store-order.md
    Affected units
    PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE, PTO-ARCH-MEMORY-MODEL-ATOMICITY, PTO-ARCH-MEMORY-MODEL-FAULT-PRECISION, PTO-ARCH-MEMORY-MODEL-MEMORY-EVENTS, PTO-ARCH-MEMORY-MODEL-ORDERING, PTO-ARCH-OVERVIEW-ARCHITECTURE
    Affected NDF
    PTO-ARCH-COMMIT-EVENT-CONFORMANCE-001
    SHA-256
    b80d8782e4587d4023edf02df9d2ba4d3cb2b2999fdc8991e49a2af4f9817735
    Open exact decision source ↗ for ADR-0006
  • Production memory events and atomic corners · accepted
    1. decision recordADR
    2. case0020

    Decision record

    Loading ADR-0020…

    Sources and references
    Complete stable ID
    ADR-0020
    Path
    docs/status/decisions/0020-production-memory-events-and-atomic-corners.md
    Affected units
    PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE, PTO-ARCH-MEMORY-MODEL-ATOMICITY, PTO-ARCH-MEMORY-MODEL-FAULT-PRECISION, PTO-ARCH-MEMORY-MODEL-GLOBAL-MEMORY-ACCESS, PTO-ARCH-MEMORY-MODEL-MEMORY-EVENTS, PTO-ARCH-MEMORY-MODEL-ORDERING, PTO-BLOCK-BSTART-GMOV, PTO-BLOCK-BSTART-MGATHER, PTO-BLOCK-BSTART-MGATHER-CAS, PTO-BLOCK-BSTART-MGATHER-MASK, PTO-BLOCK-BSTART-MSCATTER, PTO-BLOCK-BSTART-MSCATTER-MASK, PTO-BLOCK-BSTART-TLOAD, PTO-BLOCK-BSTART-TPREFETCH, PTO-BLOCK-BSTART-TSTORE, PTO-SCALAR-CASB, PTO-SCALAR-CASD, PTO-SCALAR-CASH, PTO-SCALAR-CASW, PTO-SCALAR-DMA, PTO-SCALAR-HL-CASB, PTO-SCALAR-HL-CASD, PTO-SCALAR-HL-CASH, PTO-SCALAR-HL-CASW, PTO-SCALAR-LD-ADD, PTO-SCALAR-LD-AND, PTO-SCALAR-LD-OR, PTO-SCALAR-LD-SMAX, PTO-SCALAR-LD-SMIN, PTO-SCALAR-LD-UMAX, PTO-SCALAR-LD-UMIN, PTO-SCALAR-LD-XOR, PTO-SCALAR-LR-B, PTO-SCALAR-LR-D, PTO-SCALAR-LR-H, PTO-SCALAR-LR-W, PTO-SCALAR-LW-ADD, PTO-SCALAR-LW-AND, PTO-SCALAR-LW-OR, PTO-SCALAR-LW-SMAX, PTO-SCALAR-LW-SMIN, PTO-SCALAR-LW-UMAX, PTO-SCALAR-LW-UMIN, PTO-SCALAR-LW-XOR, PTO-SCALAR-SC-B, PTO-SCALAR-SC-D, PTO-SCALAR-SC-H, PTO-SCALAR-SC-W, PTO-SCALAR-SD-ADD, PTO-SCALAR-SD-AND, PTO-SCALAR-SD-OR, PTO-SCALAR-SD-SMAX, PTO-SCALAR-SD-SMIN, PTO-SCALAR-SD-UMAX, PTO-SCALAR-SD-UMIN, PTO-SCALAR-SD-XOR, PTO-SCALAR-SW-ADD, PTO-SCALAR-SW-AND, PTO-SCALAR-SW-OR, PTO-SCALAR-SW-SMAX, PTO-SCALAR-SW-SMIN, PTO-SCALAR-SW-UMAX, PTO-SCALAR-SW-UMIN, PTO-SCALAR-SW-XOR, PTO-SCALAR-SWAPB, PTO-SCALAR-SWAPD, PTO-SCALAR-SWAPH, PTO-SCALAR-SWAPW, PTO-TILE-GMOV, PTO-TILE-MGATHER, PTO-TILE-MGATHER-CAS, PTO-TILE-MGATHER-MASK, PTO-TILE-MSCATTER, PTO-TILE-MSCATTER-MASK, PTO-TILE-TLOAD, PTO-TILE-TMOV, PTO-TILE-TPREFETCH, PTO-TILE-TSTORE
    Affected NDF
    PTO-ARCH-GM-ACCESS-001, PTO-BSTART-GMOV-COLLECTIVE-001, PTO-BSTART-MGATHER-CAS-SCHEMA-001, PTO-BSTART-MGATHER-MASK-SCHEMA-001, PTO-BSTART-MGATHER-SCHEMA-001, PTO-BSTART-MSCATTER-MASK-SCHEMA-001, PTO-BSTART-MSCATTER-SCHEMA-001, PTO-BSTART-TLOAD-CUBE-001, PTO-BSTART-TLOAD-MEMORY-001, PTO-BSTART-TPREFETCH-MEMORY-001, PTO-BSTART-TSTORE-CUBE-001, PTO-BSTART-TSTORE-MEMORY-001, PTO-GMOV-CORE4-PEER-001, PTO-MGATHER-BYTE-DISPLACEMENT-001, PTO-MGATHER-CAS-ATOMIC-001, PTO-MGATHER-CAS-PUBLICATION-001, PTO-MGATHER-MASK-PREDICATE-001, PTO-MGATHER-MASK-PUBLICATION-001, PTO-MGATHER-MASK-TYPE-002, PTO-MSCATTER-BYTE-DISPLACEMENT-001, PTO-MSCATTER-DUPLICATE-ORDER-001, PTO-MSCATTER-MASK-DUPLICATE-001, PTO-MSCATTER-MASK-PREDICATE-001, PTO-MSCATTER-MASK-TYPE-002, PTO-SD-XOR-ADR-CONTRACT-001, PTO-SW-ADD-ADR-CONTRACT-001, PTO-SW-AND-ADR-CONTRACT-001, PTO-SW-OR-ADR-CONTRACT-001, PTO-SW-SMAX-ADR-CONTRACT-001, PTO-SW-SMIN-ADR-CONTRACT-001, PTO-SW-UMAX-ADR-CONTRACT-001, PTO-SW-UMIN-ADR-CONTRACT-001, PTO-SW-XOR-ADR-CONTRACT-001, PTO-SWAPB-ADR-CONTRACT-001, PTO-SWAPD-ADR-CONTRACT-001, PTO-SWAPH-ADR-CONTRACT-001, PTO-SWAPW-ADR-CONTRACT-001, PTO-TLOAD-CUBE-001, PTO-TLOAD-MEMORY-001, PTO-TMOV-CONTRACT-001, PTO-TPREFETCH-FOOTPRINT-001, PTO-TSTORE-CUBE-001, PTO-TSTORE-MEMORY-001
    SHA-256
    215b18f05d0b53120949373fce6a5ce22f7ab534fb22df24743a9b2b4beb2dec
    Open exact decision source ↗ for ADR-0020

Unit metadata

Open 4 generated metadata fields
id
PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE
surface
arch
classification
[
  "memory-model",
  "address-space"
]
depends_on
[
  "PTO-ARCH-STATE-DEFINEDNESS"
]
Open generated traceability record
{
  "classification": [
    "memory-model",
    "address-space"
  ],
  "documentation": "docs/arch/memory-model/address-space.md",
  "id": "PTO-ARCH-MEMORY-MODEL-ADDRESS-SPACE",
  "mnemonic": null,
  "readiness_subjects": [
    "ADR-0006",
    "ADR-0020"
  ],
  "semantic_tests": [],
  "source": "asl/arch/memory-model/address-space.asl",
  "surface": "arch",
  "tests": [
    "PTO-AVS-ARCH-MEMORY-MODEL-ADDRESS-SPACE-STATIC-001"
  ]
}

Sources and release identity

Show commit, paths, hashes, version, and canonical owners
Release
0.58.5 · Release candidate
Commit
7dc8b7e5b121d2b2499a2273bebff29e2cd86812
Original ASL
asl/arch/memory-model/address-space.asl
ASL SHA-256
849dbcf439dc8dcd09d40056d80bc984bdcf0936c2da074db8fdf7abc22edfd0
Generated documentation
docs/arch/memory-model/address-space.md · embedded in this page
Documentation SHA-256
afe4766eb4e538c165e2675f2b20407daaf36dddee1d58fbfaf9bb6c18aba2ed

Exact owners