Lines Matching defs:log1p
29 /* log1p(x)
42 * 2. Approximation of log1p(f).
60 * log1p(f) = f - (hfsq - s*(hfsq+R)).
62 * 3. Finally, log1p(x) = k*ln2 + log1p(f).
69 * log1p(x) is NaN with signal if x < -1 (including -INF) ;
70 * log1p(+INF) is +INF; log1p(-1) is -INF with signal;
71 * log1p(NaN) is that NaN with no signal.
84 * algorithm can be used to compute log1p(x) to within a few ULP:
106 log1p (double x)
124 /* log1p(-1) = +inf */
129 /* log1p(x<-1) = NaN */
233 } /* log1p */