* tx86addnode.second_cmpfloatsse and tx86addnode.second_cmpfloatavx are identical except instruction opcodes -> merged into second_cmpfloatvector, cleaned up, and allowed constant operands at both sides.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27314 3ad0048d-3df7-0310-abae-a5850022a9f2
+ Consider target_info.cprefix in symbol names.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27315 3ad0048d-3df7-0310-abae-a5850022a9f2