Lines Matching full:2
42 * log(1+x) = x - 0.5 x^2 + x^3 P(x)/Q(x).
44 * Otherwise, setting z = 2(w-1)/(w+1),
59 /* Coefficients for log(1+x) = x - x^2 / 2 + x^3 P(x)/Q(x)
60 * 1/sqrt(2) <= 1+x < sqrt(2)
92 /* Coefficients for log(x) = z + z^3 P(z^2)/Q(z^2),
93 * where z = 2(x-1)/(x+1)
94 * 1/sqrt(2) <= x < sqrt(2)
113 /* C1 + C2 = ln 2 */
118 /* ln (2^16384 * (1 - 2^-113)) */
156 /* Logarithm using log(x) = z + z^3 P(z^2)/Q(z^2), in log1pl()
157 where z = 2(x-1)/x+1). */ in log1pl()
158 if ((e > 2) || (e < -2)) in log1pl()
161 { /* 2( 2x-1 )/( 2x+1 ) */ in log1pl()
167 { /* 2 (x-1)/(x+1) */ in log1pl()
195 /* Logarithm using log(1+x) = x - .5x^2 + x^3 P(x)/Q(x). */ in log1pl()
201 x = 2.0L * x - 1.0L; /* 2x - 1 */ in log1pl()