Subversion Repositories openrisc_2011-10-31

/* wf_sqrt.c -- float version of w_sqrt.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.

 * ====================================================

 */

/*

 * wrapper sqrtf(x)

 */

#include "fdlibm.h"

#include <errno.h>

#ifdef __STDC__

        float sqrtf(float x)            /* wrapper sqrtf */

#else

        float sqrtf(x)                  /* wrapper sqrtf */

        float x;

#endif

{

#ifdef _IEEE_LIBM

        return __ieee754_sqrtf(x);

#else

        float z;

        struct exception exc;

        z = __ieee754_sqrtf(x);

        if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;

        if(x<(float)0.0) {

            /* sqrtf(negative) */

            exc.type = DOMAIN;

            exc.name = "sqrtf";

            exc.err = 0;

            exc.arg1 = exc.arg2 = (double)x;

            if (_LIB_VERSION == _SVID_)

              exc.retval = 0.0;

            else

              exc.retval = 0.0/0.0;

            if (_LIB_VERSION == _POSIX_)

              errno = EDOM;

            else if (!matherr(&exc)) {

              errno = EDOM;

            }

            if (exc.err != 0)

              errno = exc.err;

            return (float)exc.retval;

        } else

            return z;

#endif

}

#ifdef _DOUBLE_IS_32BITS

#ifdef __STDC__

        double sqrt(double x)

#else

        double sqrt(x)

        double x;

#endif

{

        return (double) sqrtf((float) x);

}

#endif /* defined(_DOUBLE_IS_32BITS) */