wasmtime_environ::__core::arch::x86_64

Struct __m128i

1.27.0 · source
#[repr(simd)]
pub struct __m128i(/* private fields */);
Available on 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.

The in-memory representation of this type is the same as the one of an equivalent array (i.e. the in-memory order of elements is the same, and there is no padding); however, the alignment is different and equal to the size of the type. Note that the ABI for function calls may not be the same.

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 AsBytes for __m128i

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fn as_bytes(&self) -> &[u8]

Gets the bytes of this value. Read more
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fn as_bytes_mut(&mut self) -> &mut [u8]
where Self: FromBytes,

Gets the bytes of this value mutably. Read more
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fn write_to(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to bytes. Read more
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fn write_to_prefix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the prefix of bytes. Read more
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fn write_to_suffix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the suffix of bytes. Read more
1.27.0 · source§

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
1.27.0 · source§

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 FromBytes for __m128i

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fn ref_from(bytes: &[u8]) -> Option<&Self>
where Self: Sized,

Interprets the given bytes as a &Self without copying. Read more
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fn ref_from_prefix(bytes: &[u8]) -> Option<&Self>
where Self: Sized,

Interprets the prefix of the given bytes as a &Self without copying. Read more
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fn ref_from_suffix(bytes: &[u8]) -> Option<&Self>
where Self: Sized,

Interprets the suffix of the given bytes as a &Self without copying. Read more
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fn mut_from(bytes: &mut [u8]) -> Option<&mut Self>
where Self: Sized + AsBytes,

Interprets the given bytes as a &mut Self without copying. Read more
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fn mut_from_prefix(bytes: &mut [u8]) -> Option<&mut Self>
where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut Self without copying. Read more
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fn mut_from_suffix(bytes: &mut [u8]) -> Option<&mut Self>
where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut Self without copying. Read more
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fn slice_from(bytes: &[u8]) -> Option<&[Self]>
where Self: Sized,

Interprets the given bytes as a &[Self] without copying. Read more
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fn slice_from_prefix(bytes: &[u8], count: usize) -> Option<(&[Self], &[u8])>
where Self: Sized,

Interprets the prefix of the given bytes as a &[Self] with length equal to count without copying. Read more
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fn slice_from_suffix(bytes: &[u8], count: usize) -> Option<(&[u8], &[Self])>
where Self: Sized,

Interprets the suffix of the given bytes as a &[Self] with length equal to count without copying. Read more
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fn mut_slice_from(bytes: &mut [u8]) -> Option<&mut [Self]>
where Self: Sized + AsBytes,

Interprets the given bytes as a &mut [Self] without copying. Read more
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fn mut_slice_from_prefix( bytes: &mut [u8], count: usize, ) -> Option<(&mut [Self], &mut [u8])>
where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut [Self] with length equal to count without copying. Read more
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fn mut_slice_from_suffix( bytes: &mut [u8], count: usize, ) -> Option<(&mut [u8], &mut [Self])>
where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut [Self] with length equal to count without copying. Read more
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fn read_from(bytes: &[u8]) -> Option<Self>
where Self: Sized,

Reads a copy of Self from bytes. Read more
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fn read_from_prefix(bytes: &[u8]) -> Option<Self>
where Self: Sized,

Reads a copy of Self from the prefix of bytes. Read more
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fn read_from_suffix(bytes: &[u8]) -> Option<Self>
where Self: Sized,

Reads a copy of Self from the suffix of bytes. Read more
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impl FromZeroes for __m128i

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fn zero(&mut self)

Overwrites self with zeroes. Read more
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fn new_zeroed() -> Self
where Self: Sized,

Creates an instance of Self from zeroed bytes. Read more
1.27.0 · source§

impl Copy for __m128i

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

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

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> ToOwned for T
where 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 T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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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 T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.