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| /vbox/src/VBox/Devices/EFI/Firmware/StdLib/LibC/Math/ |
| H A D | k_cos.c | 44 * For better accuracy when x > 0.3, let qx = |x|/4 with
45 * the last 32 bits mask off, and if x > 0.78125, let qx = 0.28125.
47 * cos(x+y) = (1-qx) - ((x*x/2-qx) - (r-x*y)).
48 * Note that 1-qx and (x*x/2-qx) is EXACT here, and the
68 double a,hz,z,r,qx; local
81 qx = 0.28125;
83 INSERT_WORDS(qx,ix-0x00200000,0); /* x/4 */
85 hz = 0.5*z-qx;
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