Function simdnoise::sse2::fbm_1d

pub unsafe fn fbm_1d(
    x: __m128, 
    lacunarity: __m128, 
    gain: __m128, 
    octaves: u8, 
    seed: i32
) -> __m128

This is supported with target feature sse2 only.

Get a single value of 1d fractal brownian motion.