Enum Backend 

#[non_exhaustive]
#[repr(u8)]
pub enum Backend {
    Scalar = 0,
    Neon = 1,
    Sse2 = 2,
    Avx2 = 3,
    Avx512 = 4,
    Wasm128 = 5,
}

Which fill_segment implementation to use.

A variant is added every time another ISA is ported, so this is #[non_exhaustive] — write a _ arm downstream. Backend::ALL is a slice for the same reason: its length must not be part of the API.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Scalar = 0

Portable scalar code. Always available.

Neon = 1

AArch64 NEON.

Sse2 = 2

x86 / x86-64 SSE2.

Avx2 = 3

x86-64 AVX2.

Avx512 = 4

x86-64 AVX-512F.

Wasm128 = 5

wasm32 fixed-width SIMD128. Compile-time selected; see wasm128.

Implementations

impl Backend

pub const ALL: &'static [Backend]

Every backend, in ascending preference order.

pub const fn name(self) -> &'static str

Short lowercase name, handy for bench ids and test output.

pub fn is_available(self) -> bool

Whether this CPU can execute this backend right now.

Unlike detect, this asks about one specific backend, so tests and benches can loop over Backend::ALL and skip what the host cannot run.

Trait Implementations

impl Clone for Backend

fn clone(&self) -> Backend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Backend

impl Debug for Backend

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

Formats the value using the given formatter.

impl Display for Backend

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

Formats the value using the given formatter.

impl Eq for Backend

impl Hash for Backend

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Backend

fn cmp(&self, other: &Backend) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Backend

fn eq(&self, other: &Backend) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for Backend

fn partial_cmp(&self, other: &Backend) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Backend