Lines Matching refs:z
43 * = 2s + 2s*z*R(z) ...z=(1-x)/2, s=sqrt(z)
44 * = 2f + (2c + 2s*z*R(z))
45 * where f=hi part of s, and c = (z-f*f)/(s+f) is the correction term
46 * for f so that f+c ~ sqrt(z).
49 * = pi - 0.5*(s+s*z*R(z)), where z=(1-|x|)/2,s=sqrt(z)
98 double z, p, q, r, w, s, c, df;
123 z = x * x;
124 p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 +
125 z * (pS4 + z * pS5)))));
126 q = one + z * (qS1 + z * (qS2 + z * (qS3 + z * qS4)));
131 z = (one + x) * 0.5;
132 p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 +
133 z * (pS4 + z * pS5)))));
134 q = one + z * (qS1 + z * (qS2 + z * (qS3 + z * qS4)));
135 s = sqrt(z);
141 z = (one - x) * 0.5;
142 s = sqrt(z);
145 c = (z - df * df) / (s + df);
146 p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 +
147 z * (pS4 + z * pS5)))));
148 q = one + z * (qS1 + z * (qS2 + z * (qS3 + z * qS4)));