* tcg68k.a_op_reg_reg: renamed parameters 'reg1' and 'reg2' to 'src' and 'dst' to make it clear what's what.
* tcg68k.fixref method made public.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28095 3ad0048d-3df7-0310-abae-a5850022a9f2
* tm68knotnode brought up to speed:
 - removed code for everything but booleans (it is handled perfectly well by generic code)
 + operate directly on references when possible
 + added handling for 64-bit data.


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28096 3ad0048d-3df7-0310-abae-a5850022a9f2