Function core::arch::x86_64::_mm_cvtepi8_epi16

pub unsafe fn _mm_cvtepi8_epi16(a: __m128i) -> __m128i

This is supported on (non-crate feature miri-test-libstd or test or doctest) and x86-64 and target feature sse4.1 only.

Sign extend packed 8-bit integers in a to packed 16-bit integers

Intel’s documentation