pub unsafe fn aes32dsmi(rs1: u32, rs2: u32, const BS: u8) -> u32
🔬This is a nightly-only experimental API. (
riscv_ext_intrinsics
#114544)Available on RISC-V RV32 and target feature
zknd
only.Expand description
AES middle round decryption instruction for RV32.
This instruction sources a single byte from rs2 according to bs. To this it applies the inverse AES SBox operation, and a partial inverse MixColumn, before XOR’ing the result with rs1. This instruction must always be implemented such that its execution latency does not depend on the data being operated on.
Source: RISC-V Cryptography Extensions Volume I: Scalar & Entropy Source Instructions
Version: v1.0.1
Section: 3.2
§Note
The BS
parameter is expected to be a constant value and only the bottom 2 bits of bs
are
used.
§Safety
This function is safe to use if the zknd
target feature is present.