Lines Matching refs:qx
642 * For better accuracy when x > 0.3, let qx = |x|/4 with
643 * the last 32 bits mask off, and if x > 0.78125, let qx = 0.28125.
645 * cos(x+y) = (1-qx) - ((x*x/2-qx) - (r-x*y)).
646 * Note that 1-qx and (x*x/2-qx) is EXACT here, and the
661 double a,hz,z,r,qx;
673 qx = 0.28125;
675 __HI(qx) = ix-0x00200000; /* x/4 */
676 __LO(qx) = 0;
678 hz = 0.5*z-qx;
679 a = one-qx;