pub struct __m128i(_, _);
Available on non-crate feature miri-test-libstd and x86-64 only.
Expand description

128-bit wide integer vector type, x86-specific

This type is the same as the __m128i type defined by Intel, representing a 128-bit SIMD register. Usage of this type typically corresponds to the sse and up target features for x86/x86_64.

Internally this type may be viewed as:

  • i8x16 - sixteen i8 variables packed together
  • i16x8 - eight i16 variables packed together
  • i32x4 - four i32 variables packed together
  • i64x2 - two i64 variables packed together

(as well as unsigned versions). Each intrinsic may interpret the internal bits differently, check the documentation of the intrinsic to see how it’s being used.

Note that this means that an instance of __m128i typically just means a “bag of bits” which is left up to interpretation at the point of use.

Most intrinsics using __m128i are prefixed with _mm_ and the integer types tend to correspond to suffixes like “epi8” or “epi32”.

Examples

#[cfg(target_arch = "x86")]
use std::arch::x86::*;
#[cfg(target_arch = "x86_64")]
use std::arch::x86_64::*;

let all_bytes_zero = _mm_setzero_si128();
let all_bytes_one = _mm_set1_epi8(1);
let four_i32 = _mm_set_epi32(1, 2, 3, 4);

Trait Implementations§

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impl Clone for __m128i

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fn clone(&self) -> __m128i

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for __m128i

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

Formats the value using the given formatter. Read more
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impl From<Simd<i16, 8>> for __m128i

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fn from(value: Simd<i16, 8>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<i32, 4>> for __m128i

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fn from(value: Simd<i32, 4>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<i64, 2>> for __m128i

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fn from(value: Simd<i64, 2>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<i8, 16>> for __m128i

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fn from(value: Simd<i8, 16>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<isize, 2>> for __m128i

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fn from(value: Simd<isize, 2>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<u16, 8>> for __m128i

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fn from(value: Simd<u16, 8>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<u32, 4>> for __m128i

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fn from(value: Simd<u32, 4>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<u64, 2>> for __m128i

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fn from(value: Simd<u64, 2>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<u8, 16>> for __m128i

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fn from(value: Simd<u8, 16>) -> __m128i

Converts to this type from the input type.
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impl From<Simd<usize, 2>> for __m128i

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fn from(value: Simd<usize, 2>) -> __m128i

Converts to this type from the input type.
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impl From<__m128i> for Simd<i16, 8>

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fn from(value: __m128i) -> Simd<i16, 8>

Converts to this type from the input type.
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impl From<__m128i> for Simd<i32, 4>

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fn from(value: __m128i) -> Simd<i32, 4>

Converts to this type from the input type.
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impl From<__m128i> for Simd<i64, 2>

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fn from(value: __m128i) -> Simd<i64, 2>

Converts to this type from the input type.
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impl From<__m128i> for Simd<i8, 16>

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fn from(value: __m128i) -> Simd<i8, 16>

Converts to this type from the input type.
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impl From<__m128i> for Simd<isize, 2>

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fn from(value: __m128i) -> Simd<isize, 2>

Converts to this type from the input type.
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impl From<__m128i> for Simd<u16, 8>

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fn from(value: __m128i) -> Simd<u16, 8>

Converts to this type from the input type.
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impl From<__m128i> for Simd<u32, 4>

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fn from(value: __m128i) -> Simd<u32, 4>

Converts to this type from the input type.
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impl From<__m128i> for Simd<u64, 2>

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fn from(value: __m128i) -> Simd<u64, 2>

Converts to this type from the input type.
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impl From<__m128i> for Simd<u8, 16>

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fn from(value: __m128i) -> Simd<u8, 16>

Converts to this type from the input type.
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impl From<__m128i> for Simd<usize, 2>

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fn from(value: __m128i) -> Simd<usize, 2>

Converts to this type from the input type.
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impl Copy for __m128i

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere T: 'a,

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fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

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impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere T: 'a,

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fn implicit( self, class: Class, constructed: bool, tag: u32 ) -> TaggedParser<'a, Implicit, Self, E>

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

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

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

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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same<T> for T

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type Output = T

Should always be Self
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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more