view gcc/config/floatunsisf.c @ 8:5066dc73ff8f

xxx
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Thu, 20 Aug 2009 19:10:35 +0900
parents a06113de4d67
children
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/* Public domain.  */
typedef int SItype __attribute__ ((mode (SI)));
typedef unsigned int USItype __attribute__ ((mode (SI)));
typedef float SFtype __attribute__ ((mode (SF)));

SFtype
__floatunsisf (USItype u)
{
  SItype s = (SItype) u;
  if (s < 0)
    {
      /* As in expand_float, compute (u & 1) | (u >> 1) to ensure
	 correct rounding if a nonzero bit is shifted out.  */
      return (SFtype) 2.0 * (SFtype) (SItype) ((u & 1) | (u >> 1));
    }
  else
    return (SFtype) s;
}