1/* k_sinf.c -- float version of k_sin.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#ifndef lint
| 1/* k_sinf.c -- float version of k_sin.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#ifndef lint
|
17static char rcsid[] = "$FreeBSD: head/lib/msun/src/k_sinf.c 97413 2002-05-28 18:15:04Z alfred $";
| 17static char rcsid[] = "$FreeBSD: head/lib/msun/src/k_sinf.c 151620 2005-10-24 14:08:36Z bde $";
|
18#endif
19
20#include "math.h"
21#include "math_private.h"
22
23static const float
24half = 5.0000000000e-01,/* 0x3f000000 */
25S1 = -1.6666667163e-01, /* 0xbe2aaaab */
26S2 = 8.3333337680e-03, /* 0x3c088889 */
27S3 = -1.9841270114e-04, /* 0xb9500d01 */
28S4 = 2.7557314297e-06, /* 0x3638ef1b */
29S5 = -2.5050759689e-08, /* 0xb2d72f34 */
30S6 = 1.5896910177e-10; /* 0x2f2ec9d3 */
31
32float
33__kernel_sinf(float x, float y, int iy)
34{
35 float z,r,v;
| 18#endif
19
20#include "math.h"
21#include "math_private.h"
22
23static const float
24half = 5.0000000000e-01,/* 0x3f000000 */
25S1 = -1.6666667163e-01, /* 0xbe2aaaab */
26S2 = 8.3333337680e-03, /* 0x3c088889 */
27S3 = -1.9841270114e-04, /* 0xb9500d01 */
28S4 = 2.7557314297e-06, /* 0x3638ef1b */
29S5 = -2.5050759689e-08, /* 0xb2d72f34 */
30S6 = 1.5896910177e-10; /* 0x2f2ec9d3 */
31
32float
33__kernel_sinf(float x, float y, int iy)
34{
35 float z,r,v;
|
36 int32_t ix;
37 GET_FLOAT_WORD(ix,x);
38 ix &= 0x7fffffff; /* high word of x */
39 if(ix<0x32000000) /* |x| < 2**-27 */
40 {if((int)x==0) return x;} /* generate inexact */
| 36
|
41 z = x*x;
42 v = z*x;
43 r = S2+z*(S3+z*(S4+z*(S5+z*S6)));
44 if(iy==0) return x+v*(S1+z*r);
45 else return x-((z*(half*y-v*r)-y)-v*S1);
46}
| 37 z = x*x;
38 v = z*x;
39 r = S2+z*(S3+z*(S4+z*(S5+z*S6)));
40 if(iy==0) return x+v*(S1+z*r);
41 else return x-((z*(half*y-v*r)-y)-v*S1);
42}
|