/* at cost of a cached value we could compute two at a time. */
double nrnran123_normal(nrnran123_State* s) {
double w, x, y;
double u1 = nrnran123_dblpick(s);
double u2 = nrnran123_dblpick(s);
u1 = 2.*u1 - 1.;
u2 = 2.*u2 - 1.;
w = (u1*u1) + (u2*u2);
y = sqrt( (-2.*log(w))/w);
x = u1*y;
return x;
}
virtual double asDouble() { return nrnran123_dblpick(s_); }
double nrnran123_negexp(nrnran123_State* s) {
/* min 2.3283064e-10 to max 22.18071 */
return -log(nrnran123_dblpick(s));
}