public static ulong Map(long src, long dest)
{
int msbid = (int)Bitscan.ReverseIndex64((ulong)dest);
ulong bitmask = 0xFFFFFFFFFFFFFFFF >> (63 - msbid);
ulong subsrc, sumsub = 0, _src = (ulong)src, _dest = (ulong)dest;
for (; ;)
{
subsrc = (_src & bitmask);
if (subsrc > _dest)
{
subsrc -= _dest;
}
sumsub += subsrc;
if (sumsub > _dest)
{
sumsub -= _dest;
}
_src >>= msbid;
if (_src == 0)
{
return(sumsub);
}
}
}
public static int MsbId(ulong dest)
{
return((int)Bitscan.ReverseIndex64(dest));
}
public static ulong Mask(ulong dest)
{
int msbId = (int)Bitscan.ReverseIndex64(dest);
return(0xFFFFFFFFFFFFFFFF >> (63 - msbId));
}
