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 #include "math.h"
17 #include "math_private.h"
18
19 static const float
20 half = 5.0000000000e-01,/* 0x3f000000 */
21 S1 = -1.6666667163e-01, /* 0xbe2aaaab */
22 S2 = 8.3333337680e-03, /* 0x3c088889 */
23 S3 = -1.9841270114e-04, /* 0xb9500d01 */
24 S4 = 2.7557314297e-06, /* 0x3638ef1b */
25 S5 = -2.5050759689e-08, /* 0xb2d72f34 */
26 S6 = 1.5896910177e-10; /* 0x2f2ec9d3 */
27
28 float
__kernel_sinf(float x,float y,int iy)29 __kernel_sinf(float x, float y, int iy)
30 {
31 float z,r,v;
32
33 z = x*x;
34 v = z*x;
35 r = S2+z*(S3+z*(S4+z*(S5+z*S6)));
36 if(iy==0) return x+v*(S1+z*r);
37 else return x-((z*(half*y-v*r)-y)-v*S1);
38 }
39