Struct highway::SseHash

pub struct SseHash { /* fields omitted */ }

SSE empowered implementation that will only work on x86_64 with sse 4.1 enabled at the CPU level.

Methods

impl SseHash

pub unsafe fn force_new(key: &Key) -> Self

Creates a new SseHash while circumventing the runtime check for sse4.1. This function is unsafe! If will cause a segfault if sse4.1 is not enabled. Only use this function if you have benchmarked that the runtime check is significant and you know sse4.1 is already enabled.

pub fn new(key: &Key) -> Option<Self>

Create a new SseHash if the sse4.1 feature is detected

Trait Implementations

impl HighwayHash for SseHash

fn hash64(self, data: &[u8]) -> u64

Convenience function for hashing all data in a single call and receiving a 64bit hash. Results are equivalent to appending the data manually.

fn hash128(self, data: &[u8]) -> [u64; 2]

Convenience function for hashing all data in a single call and receiving a 128bit hash. Results are equivalent to appending the data manually.

fn hash256(self, data: &[u8]) -> [u64; 4]

Convenience function for hashing all data in a single call and receiving a 256bit hash. Results are equivalent to appending the data manually.

fn append(&mut self, data: &[u8])

Adds data to be hashed. If it is important, the performance characteristics of this function differs depending on the amount of data previously hashed and the amount of data to be hashed. For instance, if one appends 50, 1 byte slices then appending the 32nd byte will have a performance outlier as the internal 32 byte block is complete and internally processed.

fn finalize64(self) -> u64

Consumes the hasher to return the 64bit hash

fn finalize128(self) -> [u64; 2]

Consumes the hasher to return the 128bit hash

fn finalize256(self) -> [u64; 4]

Consumes the hasher to return the 256bit hash

impl Clone for SseHash

fn clone(&self) -> SseHash

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for SseHash

fn default() -> SseHash

Returns the "default value" for a type.

impl Debug for SseHash

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.