Lines Matching refs:atan
83 return atan (y);
95 return y; /* atan(+-0,+anything) = +-0 */
99 return pi + tiny; /* atan(+0,-anything) = pi */
103 return -pi - tiny; /* atan(-0,-anything) = -pi */
120 case 0: /* atan(+INF,+INF) */
124 case 1: /* atan(-INF,+INF) */
128 case 2: /* atan(+INF,-INF) */
132 case 3: /* atan(-INF,-INF) */
142 case 0: /* atan(+...,+INF) */
146 case 1: /* atan(-...,+INF) */
150 case 2: /* atan(+...,-INF) */
154 case 3: /* atan(-...,-INF) */
179 z.dbl = atan (fabs (y / x));
183 case 0: /* atan(+,+) */
187 case 1: /* atan(-,+) */
192 case 2: /* atan(+,-) */
197 default: /* atan(-,-) */