1/*-
2 * ====================================================
3 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
4 *
5 * Developed at SunPro, a Sun Microsystems, Inc. business.
6 * Permission to use, copy, modify, and distribute this
7 * software is freely granted, provided that this notice
8 * is preserved.
9 * ====================================================
10 *
11 * k_sinf.c and k_cosf.c merged by Steven G. Kargl.
12 */
13
14#include <sys/cdefs.h>
15__FBSDID("$FreeBSD: stable/11/lib/msun/src/k_sincosf.h 324006 2017-09-26 09:01:56Z dim $");
16
17/* |sin(x)/x - s(x)| < 2**-37.5 (~[-4.89e-12, 4.824e-12]). */
18static const double
19S1 = -0x15555554cbac77.0p-55,	/* -0.166666666416265235595 */
20S2 =  0x111110896efbb2.0p-59,	/*  0.0083333293858894631756 */
21S3 = -0x1a00f9e2cae774.0p-65,	/* -0.000198393348360966317347 */
22S4 =  0x16cd878c3b46a7.0p-71;	/*  0.0000027183114939898219064 */
23
24/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
25static const double
26C0  = -0x1ffffffd0c5e81.0p-54,	/* -0.499999997251031003120 */
27C1  =  0x155553e1053a42.0p-57,	/*  0.0416666233237390631894 */
28C2  = -0x16c087e80f1e27.0p-62,	/* -0.00138867637746099294692 */
29C3  =  0x199342e0ee5069.0p-68;	/*  0.0000243904487962774090654 */
30
31static inline void
32__kernel_sincosdf(double x, float *sn, float *cs)
33{
34	double r, s, w, z;
35
36	z = x * x;
37	w = z * z;
38	r = S3 + z * S4;
39	s = z * x;
40	*sn = (x + s * (S1 + z * S2)) + s * w * r;
41	r = C2 + z * C3;
42	*cs = ((1 + z * C0) + w * C1) + (w * z) * r;
43}
44