* patch from Max Nazhalov with improvements to the i8086 64-bit division:
  since [unnormalized] n >= 0x10000 now, we have
   1. lzv<=47, so all code that makes shifts by >= 48 is dead;
   2. q3=0, so main loop can be executed just 3 times instead of 4.



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26535 3ad0048d-3df7-0310-abae-a5850022a9f2