If you want best compliance with standard, you should set /assume:protect_parens,minus0 even though minus0 is documented as an f2003 option. It includes support for f95 SIGN intrinsic as well as several f2003 requirements which were optional in f95.
The /stand:f95 and /w95 options meet f95 requirement to check standard compliance of source code.
As the other responder inidicated, we are as likely as not to miss the point of your question, if you don't clarify.
