Function core::arch::x86_64::_mm256_zextpd128_pd256

pub unsafe fn _mm256_zextpd128_pd256(a: __m128d) -> __m256d

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

Constructs a 256-bit floating-point vector of [4 x double] from a 128-bit floating-point vector of [2 x double]. The lower 128 bits contain the value of the source vector. The upper 128 bits are set to zero.

Intel’s documentation