# Struct core::arch::x86_64::__m128i

1.27.0 · source ·

    #[repr(simd)]pub struct __m128i(_, _);

Available on x86-64 and (x86 or 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);

Run

## 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

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: i16x8) -> __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: i32x4) -> __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: i64x2) -> __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: i8x16) -> __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: isizex2) -> __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: u16x8) -> __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: u32x4) -> __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: u64x2) -> __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: u8x16) -> __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: usizex2) -> __m128i

Converts to this type from the input type.
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### impl From<__m128i> for i16x8

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#### fn from(value: __m128i) -> i16x8

Converts to this type from the input type.
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### impl From<__m128i> for i32x4

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#### fn from(value: __m128i) -> i32x4

Converts to this type from the input type.
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### impl From<__m128i> for i64x2

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#### fn from(value: __m128i) -> i64x2

Converts to this type from the input type.
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### impl From<__m128i> for i8x16

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#### fn from(value: __m128i) -> i8x16

Converts to this type from the input type.
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### impl From<__m128i> for isizex2

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#### fn from(value: __m128i) -> isizex2

Converts to this type from the input type.
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### impl From<__m128i> for u16x8

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#### fn from(value: __m128i) -> u16x8

Converts to this type from the input type.
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### impl From<__m128i> for u32x4

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#### fn from(value: __m128i) -> u32x4

Converts to this type from the input type.
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### impl From<__m128i> for u64x2

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#### fn from(value: __m128i) -> u64x2

Converts to this type from the input type.
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### impl From<__m128i> for u8x16

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#### fn from(value: __m128i) -> u8x16

Converts to this type from the input type.
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### impl From<__m128i> for usizex2

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#### fn from(value: __m128i) -> usizex2

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

## Auto Trait Implementations§

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### impl RefUnwindSafe for __m128i

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### impl Send for __m128i

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### impl Sync for __m128i

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### impl Unpin for __m128i

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### impl UnwindSafe for __m128i

## 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<T> Borrow<T> for Twhere 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 Twhere 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> 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 Twhere 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, 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.
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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 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.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.