Searched refs:ieee_log1p (Results 1 - 5 of 5) sorted by relevance

/external/fdlibm/
H A De_atanh.c20 * atanh(x) = --- * ieee_log(1 + -------) = 0.5 * ieee_log1p(2 * --------)
24 * atanh(x) = 0.5*ieee_log1p(2x+2x*x/(1-x))
64 t = 0.5*ieee_log1p(t+t*x/(one-x));
66 t = 0.5*ieee_log1p((x+x)/(one-x));
H A De_acosh.c22 * acosh(x) := ieee_log1p(t+ieee_sqrt(2.0*t+t*t)); where t=x-1.
63 return ieee_log1p(t+ieee_sqrt(2.0*t+t*t));
H A Ds_asinh.c22 * := sign(x)*ieee_log1p(|x| + x^2/(1 + ieee_sqrt(1+x^2)))
58 w =ieee_log1p(ieee_fabs(x)+t/(one+ieee_sqrt(one+t)));
H A Ds_log1p.c14 /* double ieee_log1p(double x)
28 * 2. Approximation of ieee_log1p(f).
48 * 3. Finally, ieee_log1p(x) = k*ln2 + ieee_log1p(f).
56 * log1p(+INF) is +INF; ieee_log1p(-1) is -INF with signal;
70 * algorithm can be used to compute ieee_log1p(x) to within a few ULP:
100 double ieee_log1p(double x) function
102 double ieee_log1p(x)
115 if(x==-1.0) return -two54/zero; /* ieee_log1p(-1)=+inf */
116 else return (x-x)/(x-x); /* ieee_log1p(
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H A Dfdlibm.h175 extern double ieee_log1p __P((double));

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