1 /* s_tanf.c -- float version of s_tan.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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
13 * ====================================================
15 * $NetBSD: s_tanf.c,v 1.7 2002/05/26 22:01:58 wiz Exp $
16 * $DragonFly: src/lib/libm/src/s_tanf.c,v 1.1 2005/07/26 21:15:20 joerg Exp $
20 #include "math_private.h"
32 if(ix
<= 0x3f490fda) return __kernel_tanf(x
,z
,1);
34 /* tan(Inf or NaN) is NaN */
35 else if (ix
>=0x7f800000) return x
-x
; /* NaN */
37 /* argument reduction needed */
39 n
= __libm_rem_pio2f(x
,y
);
40 return __kernel_tanf(y
[0],y
[1],1-((n
&1)<<1)); /* 1 -- n even