GNU toolchain and MWDT (Metware) toolchain have different style
for accessing arguments in assembly macro. Implement the
preprocessor macro to handle the difference.
Make all ASM macros in swap_macros.h compatible for both ARC
toolchains.
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
