Fixes a regression from PR #4966 and PR #5012 where FCSEL and FCMP opcodes were added to the decoder but the flag reading/writing code was not updated for them, meaning they no longer went into the OP_xx workaround, resulting in incorrect aflags attributes and resulting instrumentation bugs.
Tested on the large application where app crashes were first seen. It's not clear how to easily add a regression test for this kind of thing for all opcodes.
Fixes #5023 (closed)