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Sep 29, 2025
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RISC-V: Extension Updates (including document references) #2002

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e0393d6
RISC-V: Remove non-existent `Zb`
a4lg Sep 17, 2025
b04ae33
RISC-V: Reference to ISA Manual, version 20250508
a4lg Sep 17, 2025
11c02f5
RISC-V: Fix link for `zbkc`
a4lg Sep 17, 2025
0752505
RISC-V: Update implication from `zbc`
a4lg Sep 17, 2025
1adf4c7
Use oxford comma
ehuss Sep 29, 2025
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61 changes: 30 additions & 31 deletions src/attributes/codegen.md
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Expand Up @@ -492,25 +492,25 @@ On this platform the usage of `#[target_feature]` functions follows the
[above restrictions][attributes.codegen.target_feature.safety-restrictions].

Further documentation on these features can be found in their respective
specification. Many specifications are described in the [RISC-V ISA Manual] or
in another manual hosted on the [RISC-V GitHub Account].
specification. Many specifications are described in the [RISC-V ISA Manual],
[version 20250508], or in another manual hosted on the [RISC-V GitHub Account].

[RISC-V ISA Manual]: https://github.com/riscv/riscv-isa-manual
[version 20250508]: https://github.com/riscv/riscv-isa-manual/tree/20250508
[RISC-V GitHub Account]: https://github.com/riscv

Feature | Implicitly Enables | Description
------------|---------------------|-------------------
`a` | | [A][rv-a] --- Atomic instructions
`c` | | [C][rv-c] --- Compressed instructions
`m` | | [M][rv-m] --- Integer Multiplication and Division instructions
`zb` | `zba`, `zbc`, `zbs` | [Zb][rv-zb] --- Bit Manipulation instructions
`zba` | | [Zba][rv-zb-zba] --- Address Generation instructions
`zbb` | | [Zbb][rv-zb-zbb] --- Basic bit-manipulation
`zbc` | | [Zbc][rv-zb-zbc] --- Carry-less multiplication
`zbkb` | | [Zbkb][rv-zb-zbkb] --- Bit Manipulation Instructions for Cryptography
`zbkc` | | [Zbkc][rv-zb-zbc] --- Carry-less multiplication for Cryptography
`zbkx` | | [Zbkx][rv-zb-zbkx] --- Crossbar permutations
`zbs` | | [Zbs][rv-zb-zbs] --- Single-bit instructions
`zba` | | [Zba][rv-zba] --- Address Generation instructions
`zbb` | | [Zbb][rv-zbb] --- Basic bit-manipulation
`zbc` | `zbkc` | [Zbc][rv-zbc] --- Carry-less multiplication
`zbkb` | | [Zbkb][rv-zbkb] --- Bit Manipulation Instructions for Cryptography
`zbkc` | | [Zbkc][rv-zbkc] --- Carry-less multiplication for Cryptography
`zbkx` | | [Zbkx][rv-zbkx] --- Crossbar permutations
`zbs` | | [Zbs][rv-zbs] --- Single-bit instructions
`zk` | `zkn`, `zkr`, `zks`, `zkt`, `zbkb`, `zbkc`, `zkbx` | [Zk][rv-zk] --- Scalar Cryptography
`zkn` | `zknd`, `zkne`, `zknh`, `zbkb`, `zbkc`, `zkbx` | [Zkn][rv-zkn] --- NIST Algorithm suite extension
`zknd` | | [Zknd][rv-zknd] --- NIST Suite: AES Decryption
Expand All @@ -524,27 +524,26 @@ Feature | Implicitly Enables | Description

<!-- Keep links near each table to make it easier to move and update. -->

[rv-a]: https://github.com/riscv/riscv-isa-manual/blob/de46343a245c6ee1f7b1a40c92fe1a86bd4f4978/src/a-st-ext.adoc
[rv-c]: https://github.com/riscv/riscv-isa-manual/blob/de46343a245c6ee1f7b1a40c92fe1a86bd4f4978/src/c-st-ext.adoc
[rv-m]: https://github.com/riscv/riscv-isa-manual/blob/de46343a245c6ee1f7b1a40c92fe1a86bd4f4978/src/m-st-ext.adoc
[rv-zb]: https://github.com/riscv/riscv-bitmanip
[rv-zb-zba]: https://github.com/riscv/riscv-bitmanip/blob/main/bitmanip/zba.adoc
[rv-zb-zbb]: https://github.com/riscv/riscv-bitmanip/blob/main/bitmanip/zbb.adoc
[rv-zb-zbc]: https://github.com/riscv/riscv-bitmanip/blob/main/bitmanip/zbc.adoc
[rv-zb-zbkb]: https://github.com/riscv/riscv-bitmanip/blob/main/bitmanip/zbkb.adoc
[rv-zb-zbkc]: https://github.com/riscv/riscv-bitmanip/blob/main/bitmanip/zbkc.adoc
[rv-zb-zbkx]: https://github.com/riscv/riscv-bitmanip/blob/main/bitmanip/zbkx.adoc
[rv-zb-zbs]: https://github.com/riscv/riscv-bitmanip/blob/main/bitmanip/zbs.adoc
[rv-zk]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zk.adoc
[rv-zkn]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zkn.adoc
[rv-zkne]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zkne.adoc
[rv-zknd]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zknd.adoc
[rv-zknh]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zknh.adoc
[rv-zkr]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zkr.adoc
[rv-zks]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zks.adoc
[rv-zksed]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zksed.adoc
[rv-zksh]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zksh.adoc
[rv-zkt]: https://github.com/riscv/riscv-crypto/blob/e2dd7d98b7f34d477e38cb5fd7a3af4379525189/doc/scalar/riscv-crypto-scalar-zkt.adoc
[rv-a]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/a-st-ext.adoc
[rv-c]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/c-st-ext.adoc
[rv-m]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/m-st-ext.adoc
[rv-zba]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/b-st-ext.adoc
[rv-zbb]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/b-st-ext.adoc
[rv-zbc]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/b-st-ext.adoc
[rv-zbkb]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/b-st-ext.adoc
[rv-zbkc]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/b-st-ext.adoc
[rv-zbkx]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/b-st-ext.adoc
[rv-zbs]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/b-st-ext.adoc
[rv-zk]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zkn]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zkne]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zknd]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zknh]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zkr]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zks]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zksed]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zksh]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc
[rv-zkt]: https://github.com/riscv/riscv-isa-manual/blob/20250508/src/scalar-crypto.adoc

r[attributes.codegen.target_feature.wasm]
#### `wasm32` or `wasm64`
Expand Down