text: /* 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 <sys/cdefs.h>
  __FBSDID("$FreeBSD$");
  
  #include "math.h"
  #include "math_private.h"
  
  static const float one = 1.0;
  
  float
  modff(float x, float *iptr)
  {
  	int32_t i0,j0;
  	u_int32_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 */
  		    u_int32_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 */
  	    u_int32_t ix;
  	    *iptr = x*one;
  	    if (x != x)			/* NaN */
  		return x;
  	    GET_FLOAT_WORD(ix,x);
  	    SET_FLOAT_WORD(x,ix&0x80000000);	/* return +-0 */
  	    return x;
  	}
  }
  