Lines Matching full:z
22 * = 2s + 2s*z*R(z) ...z=(1-x)/2, s=sqrt(z)
23 * = 2f + (2c + 2s*z*R(z))
24 * where f=hi part of s, and c = (z-f*f)/(s+f) is the correction term
25 * for f so that f+c ~ sqrt(z).
28 * = pi - 0.5*(s+s*z*R(z)), where z=(1-|x|)/2,s=sqrt(z)
63 double z,p,q,r,w,s,c,df; in acos() local
78 z = x*x; in acos()
79 p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5))))); in acos()
80 q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4))); in acos()
84 z = (one+x)*0.5; in acos()
85 p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5))))); in acos()
86 q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4))); in acos()
87 s = sqrt(z); in acos()
92 z = (one-x)*0.5; in acos()
93 s = sqrt(z); in acos()
96 c = (z-df*df)/(s+df); in acos()
97 p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5))))); in acos()
98 q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4))); in acos()