1.62858201153657823623e-02, /* 0x3F90AD3A, 0xE322DA11 */
};
-static const double
-one = 1.0,
-huge = 1.0e300;
+static const double huge = 1.0e300;
double atan(double x)
{
if (ix < 0x3fdc0000) { /* |x| < 0.4375 */
if (ix < 0x3e400000) { /* |x| < 2^-27 */
/* raise inexact */
- if (huge+x > one)
+ if (huge+x > 1.0)
return x;
}
id = -1;
if (ix < 0x3ff30000) { /* |x| < 1.1875 */
if (ix < 0x3fe60000) { /* 7/16 <= |x| < 11/16 */
id = 0;
- x = (2.0*x-one)/(2.0+x);
+ x = (2.0*x-1.0)/(2.0+x);
} else { /* 11/16 <= |x| < 19/16 */
id = 1;
- x = (x-one)/(x+one);
+ x = (x-1.0)/(x+1.0);
}
} else {
if (ix < 0x40038000) { /* |x| < 2.4375 */
id = 2;
- x = (x-1.5)/(one+1.5*x);
+ x = (x-1.5)/(1.0+1.5*x);
} else { /* 2.4375 <= |x| < 2^66 */
id = 3;
x = -1.0/x;