* MIPS addnode: rewritten almost completely:
  * shorter by 280 lines
  * generates actual instructions instead of macros
  * uses immediate operands for constants when possible
  * 64-bit and float comparisons use LOC_JUMP as location


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24236 3ad0048d-3df7-0310-abae-a5850022a9f2