Function core::arch::wasm32::u32x4_extmul_low_u16x8

pub fn u32x4_extmul_low_u16x8(a: v128, b: v128) -> v128

This is supported on WebAssembly and target feature simd128 only.

逐行整数扩展乘法产生比输入宽两倍的结果。

相当于 i32x4_mul(i32x4_extend_low_u16x8(a), i32x4_extend_low_u16x8(b))