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  1. /* Public domain.  */
  2. typedef int SItype __attribute__ ((mode (SI)));
  3. typedef unsigned int USItype __attribute__ ((mode (SI)));
  4. typedef float SFtype __attribute__ ((mode (SF)));
  5.  
  6. SFtype
  7. __floatunsisf (USItype u)
  8. {
  9.   SItype s = (SItype) u;
  10.   if (s < 0)
  11.     {
  12.       /* As in expand_float, compute (u & 1) | (u >> 1) to ensure
  13.          correct rounding if a nonzero bit is shifted out.  */
  14.       return (SFtype) 2.0 * (SFtype) (SItype) ((u & 1) | (u >> 1));
  15.     }
  16.   else
  17.     return (SFtype) s;
  18. }
  19.