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[f-cpu] Control signals on the Xbar



hi,

i have too much troubles with your modifications to the
ROP2 unit, because you changed the scheduling of the units.
Now the C and VHDL version do no behave the same way
and that's not a good news because it worked before.

Could you please move the mode and the size control bits
to the Xbar ? including their pipeline in the ROP2 unit
creates problems both in C and VHDL.

Concerning the "stalled" signal : it is not present in
the ROP2 files, because the rop2_xbar and rop2_unit
stages are "included" from the Xbar which will perform
the "if (!stalled)" thing. The execution units should
not contain the input and output pipeline latches
because it's the job of the Xbar. You just added a
pipeline stage with a conditional thing inside ROP2,
which makes it very different.

I'm going to keep some of your modifications but
i'll have to remove the tmp_* which should be in
the Xbar file.

WHYGEE
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