1 /* s_sinf.c -- float version of s_sin.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 * ====================================================
17 static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_sinf.c,v 1.5 1999/08/28 00:06:55 peter Exp $";
21 #include "math_private.h"
37 if(ix <= 0x3f490fd8) return __kernel_sinf(x,z,0);
39 /* sin(Inf or NaN) is NaN */
40 else if (ix>=0x7f800000) return x-x;
42 /* argument reduction needed */
44 n = __ieee754_rem_pio2f(x,y);
46 case 0: return __kernel_sinf(y[0],y[1],1);
47 case 1: return __kernel_cosf(y[0],y[1]);
48 case 2: return -__kernel_sinf(y[0],y[1],1);
50 return -__kernel_cosf(y[0],y[1]);