Option 'mpy-option=w' is not available for 'arc600' CPU

[dasilt]

Im trying to compile code form ARC600 dual core CPU but I'm unable set GCC to use MPYW and MPYUW instructions.
When calling gcc with -mcpu=arc600 -mmpy-option=w getting: Option 'mpy-option=w' is not available for 'arc600' CPU.
I know for sure that my processor is supporting these instructions, because alternatively I'm copiling same code with MetaWare compiler with -Xmpy16 specified, and I see binary code containing mpyw and mpyuw instructions which runs on target without any problems.

[abrodkin]

@kolerov please take a look at this one.

[kolerov]

@dasilt Unfortunately, GCC for ARC600 does not support 16x16 multiplication instructions (MPYW and MPYUW).