Function i16x8_narrow_i32x4

pub fn i16x8_narrow_i32x4(a: v128, b: v128) -> v128

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

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

Signed saturation to 0x7fff or 0x8000 is used and the input lanes are always interpreted as signed integers.