kito-cheng added a comment.
Ken has updated spec to clarify requirements of those vector crypto extensions:
https://github.com/riscv/riscv-crypto/commit/40695306f628e6dc764d1d0f35392eac792d2c3b
These Vector Crypto Extensions can be built on any RISC-V base. However,
XLEN=32 implementations
will only be able to provide 32 bit values to the .vx vector-scalar
instructions.
With the exception of Zvknhb, each of these Vector Crypto Extensions can be
build on _any_
base Vector Extension, embedded (Zve*) or application ("V"). Zvknhb requires
ELEN=64 and therefore cannot be implemented on a Zve32* base.
While the Zvkb extension can be built on an Zve32* base, the vclmul[h]
instructions will not be
supported in such a case as they require SEW=64.
...
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D138807/new/
https://reviews.llvm.org/D138807
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