1 /* sf_cos.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 * ====================================================
19 static const float one=1.0;
38 if(ix <= 0x3f490fd8) return __kernel_cosf(x,z);
40 /* cos(Inf or NaN) is NaN */
41 else if (!FLT_UWORD_IS_FINITE(ix)) return x-x;
43 /* argument reduction needed */
45 n = __ieee754_rem_pio2f(x,y);
47 case 0: return __kernel_cosf(y[0],y[1]);
48 case 1: return -__kernel_sinf(y[0],y[1],1);
49 case 2: return -__kernel_cosf(y[0],y[1]);
51 return __kernel_sinf(y[0],y[1],1);
56 #ifdef _DOUBLE_IS_32BITS
65 return (double) cosf((float) x);
68 #endif /* defined(_DOUBLE_IS_32BITS) */