1 /* k_sinf.c -- float version of k_sin.c
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
4 * $FreeBSD: src/lib/msun/src/k_sinf.c,v 1.5 1999/08/28 00:06:41 peter Exp $
5 * $DragonFly: src/lib/msun/src/Attic/k_sinf.c,v 1.2 2003/06/17 04:26:53 dillon Exp $
9 * ====================================================
10 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
12 * Developed at SunPro, a Sun Microsystems, Inc. business.
13 * Permission to use, copy, modify, and distribute this
14 * software is freely granted, provided that this notice
16 * ====================================================
20 #include "math_private.h"
27 half = 5.0000000000e-01,/* 0x3f000000 */
28 S1 = -1.6666667163e-01, /* 0xbe2aaaab */
29 S2 = 8.3333337680e-03, /* 0x3c088889 */
30 S3 = -1.9841270114e-04, /* 0xb9500d01 */
31 S4 = 2.7557314297e-06, /* 0x3638ef1b */
32 S5 = -2.5050759689e-08, /* 0xb2d72f34 */
33 S6 = 1.5896910177e-10; /* 0x2f2ec9d3 */
36 float __kernel_sinf(float x, float y, int iy)
38 float __kernel_sinf(x, y, iy)
39 float x,y; int iy; /* iy=0 if y is zero */
45 ix &= 0x7fffffff; /* high word of x */
46 if(ix<0x32000000) /* |x| < 2**-27 */
47 {if((int)x==0) return x;} /* generate inexact */
50 r = S2+z*(S3+z*(S4+z*(S5+z*S6)));
51 if(iy==0) return x+v*(S1+z*r);
52 else return x-((z*(half*y-v*r)-y)-v*S1);