Lines Matching defs:log1p
12 /* double log1p(double x)
29 * 3. Finally, log1p(x) = k*ln2 + log(1+f) + c/u. See log.c
32 * log1p(x) is NaN with signal if x < -1 (including -INF) ;
33 * log1p(+INF) is +INF; log1p(-1) is -INF with signal;
34 * log1p(NaN) is that NaN with no signal.
47 * algorithm can be used to compute log1p(x) to within a few ULP:
69 double log1p(double x)
81 return x/0.0; /* log1p(-1) = -inf */
82 return (x-x)/0.0; /* log1p(x<-1) = NaN */