1 /* s_cosf.c -- float version of s_cos.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
4 * $FreeBSD: src/lib/msun/src/s_cosf.c,v 1.5 1999/08/28 00:06:46 peter Exp $
5 * $DragonFly: src/lib/msun/src/Attic/s_cosf.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"
23 static const float one=1.0;
42 if(ix <= 0x3f490fd8) return __kernel_cosf(x,z);
44 /* cos(Inf or NaN) is NaN */
45 else if (ix>=0x7f800000) return x-x;
47 /* argument reduction needed */
49 n = __ieee754_rem_pio2f(x,y);
51 case 0: return __kernel_cosf(y[0],y[1]);
52 case 1: return -__kernel_sinf(y[0],y[1],1);
53 case 2: return -__kernel_cosf(y[0],y[1]);
55 return __kernel_sinf(y[0],y[1],1);