# Type Alias std::simd::prelude::mask64x4

source ·

    pub type mask64x4 = Mask<i64, 4>;

🔬This is a nightly-only experimental API. (`portable_simd` #86656)
Expand description

A SIMD mask with four elements for vectors with 64-bit element types.

The layout of this type is unspecified, and may change between platforms and/or Rust versions, and code should not assume that it is equivalent to `[i64; 4]`.

## Aliased Type§

    struct mask64x4(/* private fields */);