1/* k_cosf.c -- float version of k_cos.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Debugged and 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_COSDF
18#include <sys/cdefs.h>
| 1/* k_cosf.c -- float version of k_cos.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 * Debugged and 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_COSDF
18#include <sys/cdefs.h>
|
19__FBSDID("$FreeBSD: head/lib/msun/src/k_cosf.c 193368 2009-06-03 08:16:34Z ed $");
| 19__FBSDID("$FreeBSD: head/lib/msun/src/k_cosf.c 239192 2012-08-11 11:13:48Z dim $");
|
20#endif
21
22#include "math.h"
23#include "math_private.h"
24
25/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
26static const double
27one = 1.0,
28C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */
29C1 = 0x155553e1053a42.0p-57, /* 0.0416666233237390631894 */
30C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */
31C3 = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */
32
| 20#endif
21
22#include "math.h"
23#include "math_private.h"
24
25/* |cos(x) - c(x)| < 2**-34.1 (~[-5.37e-11, 5.295e-11]). */
26static const double
27one = 1.0,
28C0 = -0x1ffffffd0c5e81.0p-54, /* -0.499999997251031003120 */
29C1 = 0x155553e1053a42.0p-57, /* 0.0416666233237390631894 */
30C2 = -0x16c087e80f1e27.0p-62, /* -0.00138867637746099294692 */
31C3 = 0x199342e0ee5069.0p-68; /* 0.0000243904487962774090654 */
32
|
33#ifndef INLINE_KERNEL_COSDF
34extern
| 33#ifdef INLINE_KERNEL_COSDF
34static __inline
|
35#endif
| 35#endif
|
36__inline float
| 36float
|
37__kernel_cosdf(double x)
38{
39 double r, w, z;
40
41 /* Try to optimize for parallel evaluation as in k_tanf.c. */
42 z = x*x;
43 w = z*z;
44 r = C2+z*C3;
45 return ((one+z*C0) + w*C1) + (w*z)*r;
46}
| 37__kernel_cosdf(double x)
38{
39 double r, w, z;
40
41 /* Try to optimize for parallel evaluation as in k_tanf.c. */
42 z = x*x;
43 w = z*z;
44 r = C2+z*C3;
45 return ((one+z*C0) + w*C1) + (w*z)*r;
46}
|