Function safe_arch::move_mask_m256d

#[must_use]pub fn move_mask_m256d(a: m256d) -> i32

This is supported with target feature avx only.

Collects the sign bit of each lane into a 4-bit value.

assert_eq!(0b0100, move_mask_m256d(m256d::from([1.0, 12.0, -1.0, 3.0])));