Struct __m128i

#[repr(simd)]
pub struct __m128i([i64; 2]);

Available on x86 or x86-64 only.

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);

Tuple Fields

0: [i64; 2]

Implementations

impl __m128i

fn splat(value: i64) -> __m128i

Using my_simd([x; N]) seemingly fails tests, so use this internal helper for it instead.

const fn as_array(&self) -> &[i64; 2]

Returns an array reference containing the entire SIMD vector.

fn as_mut_array(&mut self) -> &mut [i64; 2]

Returns a mutable array reference containing the entire SIMD vector.

impl __m128i

pub(crate) fn as_u8x16(self) -> u8x16

pub(crate) fn as_u16x8(self) -> u16x8

pub(crate) fn as_u32x4(self) -> u32x4

pub(crate) fn as_u64x2(self) -> u64x2

pub(crate) fn as_i8x16(self) -> i8x16

pub(crate) fn as_i16x8(self) -> i16x8

pub(crate) fn as_i32x4(self) -> i32x4

pub(crate) fn as_i64x2(self) -> i64x2

Trait Implementations

impl Clone for __m128i

fn clone(&self) -> __m128i

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for __m128i

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

Formats the value using the given formatter.

impl From<Simd<i16, 8>> for __m128i

fn from(value: i16x8) -> __m128i

Converts to this type from the input type.

impl From<Simd<i32, 4>> for __m128i

fn from(value: i32x4) -> __m128i

Converts to this type from the input type.

impl From<Simd<i64, 2>> for __m128i

fn from(value: i64x2) -> __m128i

Converts to this type from the input type.

impl From<Simd<i8, 16>> for __m128i

fn from(value: i8x16) -> __m128i

Converts to this type from the input type.

impl From<Simd<isize, 2>> for __m128i

fn from(value: isizex2) -> __m128i

Converts to this type from the input type.

impl From<Simd<u16, 8>> for __m128i

fn from(value: u16x8) -> __m128i

Converts to this type from the input type.

impl From<Simd<u32, 4>> for __m128i

fn from(value: u32x4) -> __m128i

Converts to this type from the input type.

impl From<Simd<u64, 2>> for __m128i

fn from(value: u64x2) -> __m128i

Converts to this type from the input type.

impl From<Simd<u8, 16>> for __m128i

fn from(value: u8x16) -> __m128i

Converts to this type from the input type.

impl From<Simd<usize, 2>> for __m128i

fn from(value: usizex2) -> __m128i

Converts to this type from the input type.

impl From<__m128i> for i16x8

fn from(value: __m128i) -> i16x8

Converts to this type from the input type.

impl From<__m128i> for i32x4

fn from(value: __m128i) -> i32x4

Converts to this type from the input type.

impl From<__m128i> for i64x2

fn from(value: __m128i) -> i64x2

Converts to this type from the input type.

impl From<__m128i> for i8x16

fn from(value: __m128i) -> i8x16

Converts to this type from the input type.

impl From<__m128i> for isizex2

fn from(value: __m128i) -> isizex2

Converts to this type from the input type.

impl From<__m128i> for u16x8

fn from(value: __m128i) -> u16x8

Converts to this type from the input type.

impl From<__m128i> for u32x4

fn from(value: __m128i) -> u32x4

Converts to this type from the input type.

impl From<__m128i> for u64x2

fn from(value: __m128i) -> u64x2

Converts to this type from the input type.

impl From<__m128i> for u8x16

fn from(value: __m128i) -> u8x16

Converts to this type from the input type.

impl From<__m128i> for usizex2

fn from(value: __m128i) -> usizex2

Converts to this type from the input type.

impl Copy for __m128i