Lines Matching refs:log1p
12 /* double log1p(double x)
26 * 2. Approximation of log1p(f).
44 * log1p(f) = f - (hfsq - s*(hfsq+R)).
46 * 3. Finally, log1p(x) = k*ln2 + log1p(f).
53 * log1p(x) is NaN with signal if x < -1 (including -INF) ;
54 * log1p(+INF) is +INF; log1p(-1) is -INF with signal;
55 * log1p(NaN) is that NaN with no signal.
68 * algorithm can be used to compute log1p(x) to within a few ULP:
98 log1p(double x)
109 if(x==-1.0) return -two54/vzero; /* log1p(-1)=+inf */
110 else return (x-x)/(x-x); /* log1p(x<-1)=NaN */
175 __weak_reference(log1p, log1pl);