source: trunk/sys/libm/w_acos.c @ 90

/* @(#)w_acos.c 5.1 93/09/24 */
/*
 * ====================================================
 * 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.
 * ====================================================
 */

/*
 * wrap_acos(x)
 */

#include <libm/fdlibm.h>


#ifdef __STDC__
        double acos(double x)           /* wrapper acos */
#else
        double acos(x)                  /* wrapper acos */
        double x;
#endif
{
#ifdef _IEEE_LIBM
        return __ieee754_acos(x);
#else
        double z;
        z = __ieee754_acos(x);
        if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
        if(fabs(x)>1.0) {
                return __kernel_standard(x,x,1); /* acos(|x|>1) */
        } else
            return z;
#endif
}