Cleaned out some non-standard C code, typeof() and using
"const" variables as constants.
Also added some initial IAR support.
Signed-off-by: TTornblom <thomas.tornblom@iar.com>
Solve most of f16 issues. But there are still some remaining
build issues with gcc10q4.
2 functions are reverting to scalar version when build with gcc on M55.
(Since Helium versions of those functions are not building).