pub unsafe fn _mm512_extractf64x4_pd(a: __m512d, const IMM8: i32) -> __m256d
🔬This is a nightly-only experimental API. (stdsimd #48556)
Available on (x86 or x86-64) and target feature avx512f and x86 only.
Expand description

Extract 256 bits (composed of 4 packed double-precision (64-bit) floating-point elements) from a, selected with imm8, and store the result in dst.

Intel’s documentation