-/* sf_cos.c -- float version of s_cos.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
-
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#include "fdlibm.h"
-
-#ifdef __STDC__
-static const float one=1.0;
-#else
-static float one=1.0;
-#endif
-
-#ifdef __STDC__
- float cosf(float x)
-#else
- float cosf(x)
- float x;
-#endif
-{
- float y[2],z=0.0;
- __int32_t n,ix;
-
- GET_FLOAT_WORD(ix,x);
-
- /* |x| ~< pi/4 */
- ix &= 0x7fffffff;
- if(ix <= 0x3f490fd8) return __kernel_cosf(x,z);
-
- /* cos(Inf or NaN) is NaN */
- else if (!FLT_UWORD_IS_FINITE(ix)) return x-x;
-
- /* argument reduction needed */
- else {
- n = __ieee754_rem_pio2f(x,y);
- switch(n&3) {
- case 0: return __kernel_cosf(y[0],y[1]);
- case 1: return -__kernel_sinf(y[0],y[1],1);
- case 2: return -__kernel_cosf(y[0],y[1]);
- default:
- return __kernel_sinf(y[0],y[1],1);
- }
- }
-}
-
-#ifdef _DOUBLE_IS_32BITS
-
-#ifdef __STDC__
- double cos(double x)
-#else
- double cos(x)
- double x;
-#endif
-{
- return (double) cosf((float) x);
-}
-
-#endif /* defined(_DOUBLE_IS_32BITS) */