Lines Matching full:2
41 * log(1+x) = x - 0.5 x**2 + x**3 P(x)/Q(x).
43 * Otherwise, setting z = 2(x-1)/x+1),
68 /* Coefficients for log(1+x) = x - x**2/2 + x**3 P(x)/Q(x)
69 * 1/sqrt(2) <= 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)
110 /* log10(2) */
112 #define L102B -1.1470004336018804786261e-2L
115 #define L10EB -6.5705518096748172348871e-2L
147 * where z = 2(x-1)/x+1) in log10l()
149 if( (e > 2) || (e < -2) ) in log10l()
152 { /* 2( 2x-1 )/( 2x+1 ) */ in log10l()
158 { /* 2 (x-1)/(x+1) */ in log10l()
170 /* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */ in log10l()
175 x = ldexpl( x, 1 ) - 1.0L; /* 2x - 1 */ in log10l()
183 y = y - ldexpl( z, -1 ); /* -0.5x^2 + ... */ in log10l()
188 * and base 2 exponent by log10(2). in log10l()