1 /* s_cosf.c -- float version of s_cos.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 #include "math_private.h"
19 static const float one=1.0;
31 if(ix <= 0x3f490fd8) return __kernel_cosf(x,z);
33 /* cos(Inf or NaN) is NaN */
34 else if (ix>=0x7f800000) return x-x;
36 /* argument reduction needed */
38 n = __ieee754_rem_pio2f(x,y);
40 case 0: return __kernel_cosf(y[0],y[1]);
41 case 1: return -__kernel_sinf(y[0],y[1],1);
42 case 2: return -__kernel_cosf(y[0],y[1]);
44 return __kernel_sinf(y[0],y[1],1);