🔬This is a nightly-only experimental API. (
stdsimd
#48556)Available on (x86 or x86-64) and target feature
avx512f
and x86 only.Expand description
Performs element-by-element conversion of the lower half of packed single-precision (32-bit) floating-point elements in v2 to packed double-precision (64-bit) floating-point elements, storing the results in dst.