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/* sf_modf.c -- float version of s_modf.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 modff(float x, float *iptr)

#else

        float modff(x, iptr)

        float x,*iptr;

#endif

{

        __int32_t i0,j0;

        __uint32_t i;

        GET_FLOAT_WORD(i0,x);

        j0 = ((i0>>23)&0xff)-0x7f;      /* exponent of x */

        if(j0<23) {                     /* integer part in x */

            if(j0<0) {                   /* |x|<1 */

                SET_FLOAT_WORD(*iptr,i0&0x80000000);    /* *iptr = +-0 */

                return x;

            } else {

                i = (0x007fffff)>>j0;

                if((i0&i)==0) {                  /* x is integral */

                    __uint32_t ix;

                    *iptr = x;

                    GET_FLOAT_WORD(ix,x);

                    SET_FLOAT_WORD(x,ix&0x80000000);    /* return +-0 */

                    return x;

                } else {

                    SET_FLOAT_WORD(*iptr,i0&(~i));

                    return x - *iptr;

                }

            }

        } else {                        /* no fraction part */

            __uint32_t ix;

            *iptr = x*one;

            GET_FLOAT_WORD(ix,x);

            SET_FLOAT_WORD(x,ix&0x80000000);    /* return +-0 */

            return x;

        }

}

#ifdef _DOUBLE_IS_32BITS

#ifdef __STDC__

        double modf(double x, double *iptr)

#else

        double modf(x, iptr)

        double x,*iptr;

#endif

{

        return (double) modff((float) x, (float *) iptr);

}

#endif /* defined(_DOUBLE_IS_32BITS) */