4 double log(), exp(), cos(), sin(), atan2(), f__cabs();
5 VOID pow_zz(r,a,b) doublecomplex *r, *a, *b;
9 extern double f__cabs(double,double);
10 void pow_zz(doublecomplex *r, doublecomplex *a, doublecomplex *b)
13 double logr, logi, x, y;
15 logr = log( f__cabs(a->r, a->i) );
16 logi = atan2(a->i, a->r);
18 x = exp( logr * b->r - logi * b->i );
19 y = logr * b->i + logi * b->r;