Zbkx Extension
Versions
| Version 1.0.0 | |
|---|---|
State |
ratified |
Ratification date |
2021-12 |
| Version 1.0.1 | |
|---|---|
State |
ratified |
Ratification date |
2022-02 |
Synopsis
Adds instructions to implement a "lookup table" for 4 and 8 bit elements inside the general purpose registers.
These instructions are useful for expressing N-bit to N-bit boolean operations, and implementing cryptographic code with secret dependent memory accesses (particularly SBoxes) such that the execution latency does not depend on the (secret) data being operated on.