# Struct core::arch::x86_64::__m64[−][src]

    #[repr(simd)]
    pub struct __m64(_);

🔬 This is a nightly-only experimental API. (`stdsimd` #48556)
This is supported on x86-64 only.

64-bit wide integer vector type, x86-specific

This type is the same as the `__m64` type defined by Intel, representing a 64-bit SIMD register. Usage of this type typically corresponds to the `mmx` target feature.

Internally this type may be viewed as:

- `i8x8` - eight `i8` variables packed together
- `i16x4` - four `i16` variables packed together
- `i32x2` - two `i32` 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 `__m64` typically just means a "bag of bits" which is left up to interpretation at the point of use.

Most intrinsics using `__m64` are prefixed with `_mm_` and the integer types tend to correspond to suffixes like "pi8" or "pi32" (not to be confused with "epiXX", used for `__m128i`).

# 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_si64();
    let all_bytes_one = _mm_set1_pi8(1);
    let two_i32 = _mm_set_pi32(1, 2);Run

## Trait Implementations

###

`impl Copy for __m64`

[src]

###

`impl Clone for __m64`

[src]

####

`fn clone(&self) -> __m64`

[src]

Returns a copy of the value. Read more

####

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

1.0.0
[src]

Performs copy-assignment from `source`. Read more

###

`impl Debug for __m64`

[src]

####

`fn fmt(&self, f: &mut Formatter) -> Result`

[src]

Formats the value using the given formatter. Read more

## Auto Trait Implementations

###

`impl Send for __m64`

###

`impl Sync for __m64`

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