C:\test>\perl32\bin\perl -le"print 11 | 29 | ~15" 4294967295 C:\test>\perl64\bin\perl -le"print 11 | 29 | ~15" 18446744073709551615 C:\test>\perl64\bin\perl -le"print 11 | 29 | ( ~15 & 0xffffffff )" 4294967295