Function core::arch::wasm32::i64x2_extend_low_i32x4

pub unsafe fn i64x2_extend_low_i32x4(a: v128) -> v128

🔬 This is a nightly-only experimental API. (wasm_simd #74372)

This is supported on WebAssembly and target feature simd128 only.

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