1/* k_sinf.c -- float version of k_sin.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Optimized by Bruce D. Evans.
4 */
5
6/*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 *
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
15 */
16
17#ifndef INLINE_KERNEL_SINDF
18#include <sys/cdefs.h>
| 1/* k_sinf.c -- float version of k_sin.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Optimized by Bruce D. Evans.
4 */
5
6/*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 *
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
15 */
16
17#ifndef INLINE_KERNEL_SINDF
18#include <sys/cdefs.h>
|
19__FBSDID("$FreeBSD: head/lib/msun/src/k_sinf.c 193368 2009-06-03 08:16:34Z ed $");
| 19__FBSDID("$FreeBSD: head/lib/msun/src/k_sinf.c 239192 2012-08-11 11:13:48Z dim $");
|
20#endif
21
22#include "math.h"
23#include "math_private.h"
24
25/* |sin(x)/x - s(x)| < 2**-37.5 (~[-4.89e-12, 4.824e-12]). */
26static const double
27S1 = -0x15555554cbac77.0p-55, /* -0.166666666416265235595 */
28S2 = 0x111110896efbb2.0p-59, /* 0.0083333293858894631756 */
29S3 = -0x1a00f9e2cae774.0p-65, /* -0.000198393348360966317347 */
30S4 = 0x16cd878c3b46a7.0p-71; /* 0.0000027183114939898219064 */
31
| 20#endif
21
22#include "math.h"
23#include "math_private.h"
24
25/* |sin(x)/x - s(x)| < 2**-37.5 (~[-4.89e-12, 4.824e-12]). */
26static const double
27S1 = -0x15555554cbac77.0p-55, /* -0.166666666416265235595 */
28S2 = 0x111110896efbb2.0p-59, /* 0.0083333293858894631756 */
29S3 = -0x1a00f9e2cae774.0p-65, /* -0.000198393348360966317347 */
30S4 = 0x16cd878c3b46a7.0p-71; /* 0.0000027183114939898219064 */
31
|
32#ifndef INLINE_KERNEL_SINDF
33extern
| 32#ifdef INLINE_KERNEL_SINDF
33static __inline
|
34#endif
| 34#endif
|
35__inline float
| 35float
|
36__kernel_sindf(double x)
37{
38 double r, s, w, z;
39
40 /* Try to optimize for parallel evaluation as in k_tanf.c. */
41 z = x*x;
42 w = z*z;
43 r = S3+z*S4;
44 s = z*x;
45 return (x + s*(S1+z*S2)) + s*w*r;
46}
| 36__kernel_sindf(double x)
37{
38 double r, s, w, z;
39
40 /* Try to optimize for parallel evaluation as in k_tanf.c. */
41 z = x*x;
42 w = z*z;
43 r = S3+z*S4;
44 s = z*x;
45 return (x + s*(S1+z*S2)) + s*w*r;
46}
|