Function _mm256_permute2f128_pd

pub unsafe fn _mm256_permute2f128_pd<const IMM8: i32>(
    a: __m256d,
    b: __m256d,
) -> __m256d

Available on x86 only.

Shuffles 256 bits (composed of 4 packed double-precision (64-bit) floating-point elements) selected by imm8 from a and b.

Intel’s documentation