Function core_arch::x86_64::_mm_loadh_pd

pub unsafe fn _mm_loadh_pd(a: __m128d, mem_addr: *const f64) -> __m128d

This is supported on x86-64 and target feature sse2 only.

Loads a double-precision value into the high-order bits of a 128-bit vector of [2 x double]. The low-order bits are copied from the low-order bits of the first operand.

Intel's documentation