Function i16x8_extend_low_i8x16

pub fn i16x8_extend_low_i8x16(a: v128) -> v128

🔬This is a nightly-only experimental API. (simd_wasm64 #90599)

Available on target_family="wasm" and target feature simd128 only.

Converts low half of the smaller lane vector to a larger lane vector, sign extended.