Function i64x2_extend_high_i32x4

pub fn i64x2_extend_high_i32x4(a: v128) -> v128

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

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

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