Retro68/gcc/libgcc/floatunsisf.c

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2012-03-27 23:13:14 +00:00
/* 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;
}