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Zbkb described as a subset of Zbb, even though it is not #1658

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dzaima opened this issue Sep 28, 2024 · 0 comments · Fixed by #1660
Closed

Zbkb described as a subset of Zbb, even though it is not #1658

dzaima opened this issue Sep 28, 2024 · 0 comments · Fixed by #1660

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@dzaima
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dzaima commented Sep 28, 2024

riscv-isa-manual/src/scalar-crypto.adoc

Lines 205 to 208 in 2adf0de

==== `Zbkb` - Bitmanip instructions for Cryptography
These are a subset of the Bitmanipulation Extension `Zbb` which are
particularly useful for Cryptography. Please refer to <<b-st-ext.adoc#zbkb>>.

Among other things, Zbkb has pack, whereas Zbb does not, so Zbkb does not qualify as a subset of Zbb.
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Remove claim that Zbkb is a subset of Zbb riscv/riscv-isa-manual
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@dzaima