Function u64x2_extmul_low_u32x4

#[target_feature(enable = "simd128")]
pub fn u64x2_extmul_low_u32x4(a: v128, b: v128) -> v128

Lane-wise integer extended multiplication producing twice wider result than the inputs.

Equivalent of i64x2_mul(i64x2_extend_low_i32x4_u(a), i64x2_extend_low_i32x4_u(b))