draw_line optimized Brasenham

void draw_line(s32 x1, s32 y1, s32 x2, s32 y2){
    //faster Bresenham by Endesga
    s32 xd = x2 - x1;
    s32 yd = y2 - y1;
    s32 hs = 0x8000;
    s32 vs = 0x8000;
    s32 amount = max(abs(xd), abs(yd));
    s32 xs = ((xd << 16) / amount);
    s32 ys = ((yd << 16) / amount);

    for (u16 i = 0; i < amount; i++){
        hs += xs;
        vs += ys;
        draw_pixel(x1 + (hs >> 16), y1 + (vs >> 16));
    }
}