1*7db632caSSascha Wildner /*-
2*7db632caSSascha Wildner * ====================================================
3*7db632caSSascha Wildner * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
4*7db632caSSascha Wildner *
5*7db632caSSascha Wildner * Developed at SunPro, a Sun Microsystems, Inc. business.
6*7db632caSSascha Wildner * Permission to use, copy, modify, and distribute this
7*7db632caSSascha Wildner * software is freely granted, provided that this notice
8*7db632caSSascha Wildner * is preserved.
9*7db632caSSascha Wildner * ====================================================
10*7db632caSSascha Wildner *
11*7db632caSSascha Wildner * k_sinf.c and k_cosf.c merged by Steven G. Kargl.
12*7db632caSSascha Wildner */
13*7db632caSSascha Wildner
14*7db632caSSascha Wildner /* |sin(x)/x - s(x)| < 2**-37.5 (~[-4.89e-12, 4.824e-12]). */
15*7db632caSSascha Wildner static const double
16*7db632caSSascha Wildner S1 = -0x15555554cbac77.0p-55, /* -0.166666666416265235595 */
17*7db632caSSascha Wildner S2 = 0x111110896efbb2.0p-59, /* 0.0083333293858894631756 */
18*7db632caSSascha Wildner S3 = -0x1a00f9e2cae774.0p-65, /* -0.000198393348360966317347 */
19*7db632caSSascha Wildner S4 = 0x16cd878c3b46a7.0p-71; /* 0.0000027183114939898219064 */
20*7db632caSSascha Wildner
21*7db632caSSascha Wildner /* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
22*7db632caSSascha Wildner static const double
23*7db632caSSascha Wildner C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */
24*7db632caSSascha Wildner C1 = 0x155553e1053a42.0p-57, /* 0.0416666233237390631894 */
25*7db632caSSascha Wildner C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */
26*7db632caSSascha Wildner C3 = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */
27*7db632caSSascha Wildner
28*7db632caSSascha Wildner static inline void
__kernel_sincosdf(double x,float * sn,float * cs)29*7db632caSSascha Wildner __kernel_sincosdf(double x, float *sn, float *cs)
30*7db632caSSascha Wildner {
31*7db632caSSascha Wildner double r, s, w, z;
32*7db632caSSascha Wildner
33*7db632caSSascha Wildner z = x * x;
34*7db632caSSascha Wildner w = z * z;
35*7db632caSSascha Wildner r = S3 + z * S4;
36*7db632caSSascha Wildner s = z * x;
37*7db632caSSascha Wildner *sn = (x + s * (S1 + z * S2)) + s * w * r;
38*7db632caSSascha Wildner r = C2 + z * C3;
39*7db632caSSascha Wildner *cs = ((1 + z * C0) + w * C1) + (w * z) * r;
40*7db632caSSascha Wildner }
41