Lines Matching defs:z
44 * (3). For x <= 1/8 and let z = x*x, return
47 * (2.3) if x < 2^(-prec/6-2), atan(x) = x+(z-5/3)(z*x/5)
51 * A = (p1*x*z) * (p2+z(p3+z))
52 * B = (p4+z)+z*z) * (p5+z(p6+z))
62 * poly2(r) = (q1*r) * (q2+z(q3+z)) * (q4+z),
127 double y, z, r, p, s;
144 z = x * x;
146 return (x + (t3 + z) * (s * z));
149 z = x * x; s = p1 * x;
150 return (x + ((s * z) * (p2 + z * (p3 + z))) *
151 (((p4 + z) + z * z) * (p5 + z * (p6 + z))));
164 z = r * r;
166 return (y + ((p - r) - ((s * z) *
167 (p2 + z * (p3 + z))) *
168 (((p4 + z) + z * z) *
169 (p5 + z * (p6 + z)))));
171 z = r * r;
172 return (y + (p - ((q1 * r) * (q4 + z)) *
173 (q2 + z * (q3 + z))));
189 double *w, w0, w1, s, z;
194 z = s * s;
195 return (((q1 * s) * (q4 + z)) * (q2 + z * (q3 + z)) + w1);