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## sha512sum1r

# Function sha512sum1r

Source

    pub fn sha512sum1r(rs1: u32, rs2: u32) -> u32

🔬This is a nightly-only experimental API. (`riscv_ext_intrinsics` #114544)
Available on (RISC-V RV32) and target feature `zknh` only.
Expand description

Implements the Sum1 transformation, as used in the SHA2-512 hash function [49] (Section 4.1.3).

This instruction is implemented on RV32 only. Used to compute the Sum1 transform of the SHA2-512 hash function. The transform is a 64-bit to 64-bit function, so the input and output is represented by two 32-bit registers. 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: 3.36