/* s_modff.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 <math.h>

#include <math_private.h>

#include <libm-alias-float.h>

static const float one = 1.0;

float

__modff(float x, float *iptr)

{

	int32_t i0,j0;

	uint32_t i;

	GET_FLOAT_WORD(i0,x);

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

	if(__builtin_expect(j0<23, 1)) {		/* 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 */

	    *iptr = x*one;

	    /* We must handle NaNs separately.  */

	    if (j0 == 0x80 && (i0 & 0x7fffff))

	      return x*one;

	    SET_FLOAT_WORD(x,i0&0x80000000);	/* return +-0 */

	    return x;

	}

}

libm_alias_float (__modf, modf)