Lines Matching defs:pi
18 * ARG (x+iy) = pi - arctan[y/(-x)] ... if x < 0,
25 * ATAN2(+-0, -(anything but NaN)) is +-pi ;
26 * ATAN2(+-(anything but 0 and NaN), 0) is +-pi/2;
28 * ATAN2(+-(anything but INF and NaN), -INF) is +-pi;
29 * ATAN2(+-INF,+INF ) is +-pi/4 ;
30 * ATAN2(+-INF,-INF ) is +-3pi/4;
31 * ATAN2(+-INF, (anything but,0,NaN, and INF)) is +-pi/2;
50 pi = 3.1415926535897931160E+00, /* 0x400921FB, 0x54442D18 */
75 case 2: return pi+tiny;/* atan(+0,-anything) = pi */
76 case 3: return -pi-tiny;/* atan(-0,-anything) =-pi */
95 case 2: return pi+tiny ; /* atan(+...,-INF) */
96 case 3: return -pi-tiny ; /* atan(-...,-INF) */
116 case 2: return pi-(z-pi_lo);/* atan(+,-) */
118 return (z-pi_lo)-pi;/* atan(-,-) */