Enum Backend 

#[non_exhaustive]
pub enum Backend {
    Scalar,
    Avx512Vbmi,
    Avx2,
    Ssse3Sse41,
    Neon,
    WasmSimd128,
    Rvv,
    Sve,
}

A backend that can be reported by base64-ng.

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

The audited scalar backend.

Avx512Vbmi

An AVX-512 VBMI candidate was detected.

Avx2

An AVX2 candidate was detected.

Ssse3Sse41

An SSSE3/SSE4.1 candidate was detected.

Neon

An ARM NEON candidate was detected.

WasmSimd128

A wasm simd128 candidate was detected.

Rvv

RVV 1.0 was detected.

Production execution is restricted to the measured Linux SpacemiT X60 profile; broader project-owned builds report RVV only as a candidate.

Sve

An AArch64 SVE candidate was detected.

The 2.0 development branch reports this only from the internal project-owned candidate build. Production dispatch remains on admitted NEON or scalar until native-hardware admission evidence is accepted.

Implementations

impl Backend

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

Returns the stable lowercase identifier for this backend.

assert_eq!(base64_ng::runtime::Backend::Scalar.as_str(), "scalar");

pub const fn required_cpu_features(self) -> &'static [&'static str]

Returns the CPU features required before this backend may be used.

Security logs can record exactly which CPU feature bundle is required by an active backend or visible candidate.

assert_eq!(
    base64_ng::runtime::Backend::Avx512Vbmi.required_cpu_features(),
    ["avx512f", "avx512bw", "avx512vl", "avx512vbmi"],
);

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, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Backend

impl PartialEq for Backend

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Backend