Re: [Iverilog-devel] iverilog - constant user function.

[Larry D. <ldo...@re...>]

Friends -

On Mon, Mar 16, 2015 at 08:08:37PM +0000, Martin Whitaker wrote:
> dp...@sw... wrote:
> > Assuming I manage to fix this is there a comand line tools in Linux able to implement bitstream for Xilinx XC6SLX9 devices
> Last time I used them (which was a few years ago), the Xilinx tools worked 
> well from the Linux command line. All my FPGA builds were done via Linux shell 
> scripts.

That is still true today.  The XC6SLX9 is smaller than I have used,
but I can personally vouch for the 16 and 45.  This is with ISE 12.x
or 14.x.  Vivado is a pain, just because it's different, but a friend
of mine has that running too.

> The GUI could be used in Linux too, although I never bothered with it.

Ditto.

> I am not aware of any third-party tools that can generate bitstreams for 
> Xilinx devices.

I have been told that every time a third-party synthesizer comes out,
it's either terrible and gets dropped, or it's better than Xilinx and
Xilinx buys the company so they can roll it in to their next release.
The latter process has happened several times.

Sometimes it seems that there are open-source synthesizers that are on
the edge of being or becoming useful.  Icarus 0.8, for instance, or 
some talks by Sebastien Bourdeauducq, or Wolfgang Spraul's fpgatools.
I've noticed recently that Xilinx has started using the ABC code base.

  - Larry