From: Konrad Eisele <kon...@gaisler.com> Date: Tue, 1 Nov 2011 10:22:13 +0100
> Use -Aleon to enable binutils sparc-leon architecture. The leon-arch > binutils GAS has umul/smul and casa enabled. > > Signed-off-by: Konrad Eisele <kon...@gaisler.com> You can't just add new assembler options that are only right now being added to binutils. Instead, you have to add a test to make sure that the binutils being used alongside gcc actually supports the new option, and only pass it in if so. And subsequently, you cannot emit instructions that require the -Aleon option unless this support is present too. This is exactly what we had to do for VIS 3.0, FMAF, and HPC instructions on Niagara3. Look at the "FMAF, HPC, and VIS 3.0 instructions" gcc_GAS_CHECK_FEATURE code in gcc/configure.ac for how to do such a test. Then once you have that, you can conditionlize instruction emission as well based upon whether the feature CPP define is set or not.
