6. Instruction families and contracts
【免费下载链接】pto-isaParallel Tile Operation (PTO) is a virtual instruction set architecture designed by Ascend CANN, focusing on tile-level operations. This repository offers high-performance, cross-platform tile operations across Ascend platforms.项目地址: https://gitcode.com/cann/pto-isa
6.1 Scope
This chapter defines family-level normative contracts. Per-op normative details remain indocs/isa/*.md.
6.2 Family taxonomy
PTO instruction families:
- synchronization and resource binding
- elementwise tile-tile operations
- tile-scalar and tile-immediate operations
- axis reduce and expand operations
- memory operations (
GM <-> Tileand indexed variants) - matrix multiply and GEMV operations
- data movement and layout transforms
- irregular/complex operations
The source-synchronized inventory is maintained bydocs/isa/manifest.yaml.
6.3 Common family contract
Every instruction family MUST define:
- operand/result classes and position rules
- semantic domain (valid-region handling)
- required constraints (dtype/layout/location/shape)
- synchronization/ordering implications
- diagnostics behavior for illegal use
- implementation-defined boundaries
6.4 Valid-region-first rule
Unless a specific instruction states otherwise:
- semantics are defined only on the operation's valid domain
- out-of-domain results are unspecified
- family contracts MUST state domain-composition rules for multi-input operations
6.5 Family-level summaries
6.5.1 Synchronization and resource binding
IncludesTSYNC,TASSIGN, mode/config instructions. These operations define ordering or state-configuration effects and MUST preserve architecture ordering semantics.
6.5.2 Elementwise and scalar variants
Includes arithmetic, bitwise, compare, select, unary math, and scalar-fused forms. Operations MUST define per-element behavior and mode-specific constraints.
6.5.3 Reduce/expand families
Includes row/column reductions and broadcast-like expansions. Operations MUST define axis semantics and domain compatibility.
6.5.4 Memory families
Includes load/store/prefetch and indexed gather/scatter forms. Operations MUST define mapping between tile domains and memory domains.
6.5.5 Matrix families
IncludesTMATMUL*andTGEMV*families. Contracts MUST define accumulation domain, operand-role legality, and precision-mode interactions.
6.5.6 Movement/layout families
Includes extract/insert/reshape/transpose/fillpad-like transforms. Contracts MUST define index mapping and domain preservation rules.
6.5.7 Complex/irregular families
Includes sort/quant/partial/gather variants and other special operations. Contracts MUST explicitly identify implementation-defined portions.
6.6 Documentation contract for per-op pages
Each per-instruction page SHOULD follow Appendix B template sections:
- Syntax
- Operands
- Semantics
- Constraints
- Diagnostics
- Implementation-defined behavior
- Compatibility notes
6.7 Coverage and synchronization policy
Family and instruction indexes MUST stay synchronized with:
docs/isa/manifest.yamlinclude/pto/common/pto_instr.hpp- generated index/matrix tooling in
docs/tools/
【免费下载链接】pto-isaParallel Tile Operation (PTO) is a virtual instruction set architecture designed by Ascend CANN, focusing on tile-level operations. This repository offers high-performance, cross-platform tile operations across Ascend platforms.项目地址: https://gitcode.com/cann/pto-isa
创作声明：本文部分内容由AI辅助生成（AIGC），仅供参考
