{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
    let e = _mm256_setr_epi64x(700, 800, 500, 600);
    let r = _mm256_permute2x128_si256::<0b00_01_00_11>(a, b);
    assert_eq_m256i(r, e);