Lines Matching defs:log1p
16 /* double log1p(double x)
30 * 2. Approximation of log1p(f).
48 * log1p(f) = f - (hfsq - s*(hfsq+R)).
50 * 3. Finally, log1p(x) = k*ln2 + log1p(f).
57 * log1p(x) is NaN with signal if x < -1 (including -INF) ;
58 * log1p(+INF) is +INF; log1p(-1) is -INF with signal;
59 * log1p(NaN) is that NaN with no signal.
72 * algorithm can be used to compute log1p(x) to within a few ULP:
102 log1p(double x)
113 if(x==-1.0) return -two54/vzero; /* log1p(-1)=+inf */
114 else return (x-x)/(x-x); /* log1p(x<-1)=NaN */
179 __weak_reference(log1p, log1pl);
