extern __inline double sqrt (double __x)
{
register double __r;
__asm ("fsqrtd %1,%0" : "=f" (__r) : "f" (__x));
return __r;
}
static double our_skew, max_update_skew;
static double Sqr(double x)
{
return x*x;
}
void REF_SetReference(double skew)
{
double previous_skew, new_skew;
double old_weight, new_weight, sum_weight;
double delta_freq1, delta_freq2;
double skew1, skew2;
previous_skew = our_skew;
skew1 = sqrt((Sqr(delta_freq1) * old_weight + Sqr(delta_freq2) * new_weight) / sum_weight);
skew2 = (previous_skew * old_weight + new_skew * new_weight) / sum_weight;
our_skew = skew1 + skew2;
}