SimdPolicy

uucore::hardware

Struct SimdPolicy

pub struct SimdPolicy { /* private fields */ }

Expand description

SIMD policy based on environment variables

Respects GLIBC_TUNABLES environment variable to disable specific CPU features. This is used by GNU utilities to allow users to disable hardware acceleration.

Implementations§

impl SimdPolicy

pub fn detect() -> &'static Self

Get the global SIMD policy (cached)

This checks both hardware capabilities and the GLIBC_TUNABLES environment variable. The result is cached for the lifetime of the process.

§Examples

use uucore::hardware::SimdPolicy;

let policy = SimdPolicy::detect();
if policy.allows_simd() {
    println!("SIMD is enabled");
} else {
    println!("SIMD disabled by: {:?}", policy.disabled_features());
}

pub fn allows_simd(&self) -> bool

pub fn disabled_features(&self) -> Vec<HardwareFeature>

Trait Implementations§

impl Clone for SimdPolicy

fn clone(&self) -> SimdPolicy

Returns a duplicate of the value. Read more

1.0.0§

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

Performs copy-assignment from source. Read more

impl Debug for SimdPolicy

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

Formats the value using the given formatter. Read more

impl HasHardwareFeatures for SimdPolicy

fn has_feature(&self, feat: HardwareFeature) -> bool

fn iter_features(&self) -> impl Iterator<Item = HardwareFeature>

fn has_avx512(&self) -> bool

Check if AVX-512 is available (x86/x86_64 only)

fn has_avx2(&self) -> bool

Check if AVX2 is available (x86/x86_64 only)

fn has_pclmul(&self) -> bool

Check if PCLMULQDQ is available (x86/x86_64 only)

fn has_vmull(&self) -> bool

Check if VMULL is available (ARM only)

fn has_sse2(&self) -> bool

Check if SSE2 is available (x86/x86_64 only)

fn has_asimd(&self) -> bool

Check if ARM ASIMD/NEON is available (aarch64 only)

Auto Trait Implementations§

impl Freeze for SimdPolicy

impl RefUnwindSafe for SimdPolicy

impl Send for SimdPolicy

impl Sync for SimdPolicy

impl Unpin for SimdPolicy

impl UnwindSafe for SimdPolicy

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Same for T

type Output = T

Should always be Self

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<T> ErasedDestructor for T
where T: 'static,