White noise generator

typedef struct {
    uint16_t a;
    uint16_t b;
} ukaelEntropy;

ukaelEntropy UKAEL_STATE = {.a = 13381U, .b = 42533U};

//white noise generator
//2.5 times faster than rand()
//Doesn't pass some dieharder tests, but no audible patterns
//frequency analysis: <1db variance over 327680 samples
inline static void ukaelReseed(ukaelEntropy *s){
    //asm ("rorw    $11,    %[a]    \n\t" : [a] "+r" (s->a)    ); //about as fast
    s->a = (s->a>>11)|(s->a<<5); //bit rotate rorw
    s->a+= (s->b<<1)+13;    //adding is way better than xor
    s->b+= (s->a<<2)+11;

    return;
}