Conceptually, C inline assembly is not fed to a
standalone external assembler, but rather put
verbatim into a stream of intermediate assembly
code that is otherwise produced by a C compiler.
Also, even if the C compiler in question can
emit the intermediate assembly code (e.g.
the -S option for GCC), then that code tends
to target a particular assembler. Therefore it
may or may not be suitable for being fed to
a different assembler than the intended one.
In other words: forget it.