Page History

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Scalar Crypto Specification:

• Latest Draft Scalar Crypto Specification (v0.9.4)
  
  • Contains updates from the architectural review (30/June/2021).

Lightweight instruction set extensions for RV32 and RV64 HARTs.  Proposed extensions:

• Extensions fully defined in the Scalar Crypto Specification:  Zk, Zkn, Zks, Zkr, Zkne, Zknd, Zknh, Zksed, Zksh, Zkt
• Shared with the Bit-Manipulation Specification: Zbkx, Zbkc, Zbkb
• Instruction Group Names Diagram (click thumbnail for full-size image)

Specification

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Architecture & Opcode consistency review

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• Currently working on getting support merged in upstream in PR#80 PR#99
  • Support for all scalar-crypto dedicated instructions is present.Support for and the entropy source is still the main point of discussionpresent.
  • No support for Bitmanip. The Bitmanip TG is waiting until after the opcode and consistency review to start writing SAIL code.
  • This PR is "paused" until the next release of the scalar crypto spec, which will bring some functional changes to the `aes32*` and `sm4*` instructions.

Spike

• Upstream support has been merged in as of PR#635.
• Instructions are up to date with v0.9.4.
• Entropy source PR for v0.9.4 is here
• Support for all of scalar crypto specific instructions and entropy source.
• The only feature left is to enable the right Bitmanip instructions when K is enabled. Currently, one must include "b" in the spike "–isa=" argument.
PR#649 has now been merged. Support now consistent with v0.9.0.

riscvOVPSimPlus

• Imperas Commercial Simulator
• Freeware version
• Support for:
  • Crypto-scalar v0.7.2, v0.81 + Bitmanip subsets
  • Bitmanip 0.92, 0.93
  • Functional coverage collection.

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