Function u8x16_narrow_i16x8

#[target_feature(enable = "simd128")]
pub fn u8x16_narrow_i16x8(a: v128, b: v128) -> v128

Converts two input vectors into a smaller lane vector by narrowing each lane.

Signed saturation to 0x00 or 0xff is used and the input lanes are always interpreted as signed integers.