Integrate new xc.sbox.4 instruction - Githubissues

scarv / xcrypto

XCrypto: a cryptographic ISE for RISC-V

MIT License

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Integrate new xc.sbox.4 instruction #65

Closed ben-marshall closed 5 years ago

ben-marshall commented 5 years ago

Implementation of the proposed xc.sbox.4 instruction described in issue #52.

[X] Documentation / Specification additions
[X] Binutils Support
[X] Verification additions
[X] RTL implementation

Experimental usage with the PRINCE cipher:

~6000 cycles (15% faster) improvment per encrypt/decrypt.
1320 fewer instructions executed (15% fewer) per encrypt/decrypt.
This is on an otherwise standard C implementation of PRINCE.