| H A D | k_cos.c | 40 * For better accuracy when x > 0.3, let qx = |x|/4 with
41 * the last 32 bits mask off, and if x > 0.78125, let qx = 0.28125.
43 * cos(x+y) = (1-qx) - ((x*x/2-qx) - (r-x*y)).
44 * Note that 1-qx and (x*x/2-qx) is EXACT here, and the
71 double a,hz,z,r,qx; local
83 qx = 0.28125;
85 __HI(qx) = ix-0x00200000; /* x/4 */
86 __LO(qx)
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