major changes between 6.50 and 7.00 by Pelle :
QuoteAdded instructions for AVX(1), AVX-AES, RDTSCP, RDRAND.
Minor revision and bugfix for PTR declarations.
Better error message in some situations.
http://www.smorgasbordet.com/pellesc/changes_650_700.htm
Pelles Macro Assembler, Version 7.00.3 released with PellesC V7.0, Release Candidate #2 :
http://www.smorgasbordet.com/pellesc/download.htm