* m68k: completely replaced 64-bit comparison code with a clone of i386 implementation. No optimizations yet, but it already makes system unit about 300 instructions shorter due to changing node location to LOC_JUMP.
* Cleaned up 32-bit comparison code and implemented one of the optimizations (TST instruction for comparison with constant zero which can act directly on references). This makes system unit shorter by about 1000 instructions.


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28260 3ad0048d-3df7-0310-abae-a5850022a9f2