Lines Matching refs:qx
693 * For better accuracy when x > 0.3, let qx = |x|/4 with
694 * the last 32 bits mask off, and if x > 0.78125, let qx = 0.28125.
696 * cos(x+y) = (1-qx) - ((x*x/2-qx) - (r-x*y)).
697 * Note that 1-qx and (x*x/2-qx) is EXACT here, and the
731 double_accessor qx;
734 qx.dbl = 0.28125;
738 qx.as_int.hi = ix - 0x00200000; /* x / 4 */
739 qx.as_int.lo = 0;
741 hz = 0.5 * z - qx.dbl;
742 a = one - qx.dbl;