Lines Matching full:2
20 * Base 2 logarithm, 128-bit long double precision
34 * Returns the base 2 logarithm of x.
40 * log(1+x) = x - 0.5 x^2 + x^3 P(x)/Q(x).
42 * Otherwise, setting z = 2(x-1)/x+1),
63 /* Coefficients for ln(1+x) = x - x**2/2 + x**3 P(x)/Q(x)
64 * 1/sqrt(2) <= x < sqrt(2)
101 /* Coefficients for log(x) = z + z^3 P(z^2)/Q(z^2),
102 * where z = 2(x-1)/(x+1)
103 * 1/sqrt(2) <= x < sqrt(2)
130 /* sqrt(2)/2 */
197 * where z = 2(x-1)/x+1) in log2l()
199 if ((e > 2) || (e < -2)) in log2l()
202 { /* 2( 2x-1 )/( 2x+1 ) */ in log2l()
208 { /* 2 (x-1)/(x+1) */ in log2l()
220 /* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */ in log2l()
225 x = 2.0L * x - 1.0L; /* 2x - 1 */ in log2l()
238 * and base 2 exponent by 1 in log2l()