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  3. spp is not working

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spp is not working

marklin
marklin over 9 years ago

I need to convert from spice model to spectre model.    When I type spp,  I got   

/cadence/cds/IC5141-usr6/tools/lib/libgcc_s.so.1: version `GCC_3.3' not found (required by /usr/lib/libstdc++.so.5)

When I check the libgcc_s.so.1 in either /lib  or /cadence/cds/IC5141-usr6/tools/lib, 

strings /cadence/cds/IC5141-usr6/tools/lib/libgcc_s.so.1 | grep "GCC"    comes up   GCC_3.0

strings  /lib/libgcc_s.so.1 | grep "GCC"  comes up

GCC_3.0
GCC_3.3
GCC_3.3.1
GCC_3.4
GCC_3.4.2
GCC_4.0.0
GCC_4.2.0

Why spp has to use /cadence/cds/IC5141-usr6/tools/lib/libgcc_s.so.1 instead of /lib/libgcc_s.so.1?

Thanks.

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  • Andrew Beckett
    Andrew Beckett over 9 years ago

    You should not use spp - it's been obsolete for 11 years now and has not been maintained. It is not in any current release (IC5141 was the last release it was in, and that came out in 2004).

    Spectre can natively read SPICE netlists (more reliably than spp can convert them). Whilst spectre has always had some level of SPICE syntax support, a new native front end was added in spectre in (I think) the IC5141 version, but it wasn't enabled by default (you had to turn it on). However, you shouldn't be using spectre from the IC5141 stream anyway, because in late 2004 spectre was moved into the separate MMSIM stream. There have been 12 major releases  of MMSIM since then (the latest being MMSIM15.1) and so you should be using spectre from a recent MMSIM stream, even if you are stuck with IC5141 for some reason.

    So this would make your question a moot point. I suspect you're having a problem because you are running on an unsupported OS, but avoiding using spp altogether would be the best solution.

    Regards,

    Andrew.

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  • marklin
    marklin over 9 years ago

    Thank you, Andrew.  Yes, I am still using the legacy IC5141-usr6 but my Spectre is from MMSIM141.    Basically, I just want to use spp to convert a BSIM3v3 model file to Spectre model file but was stuck with libgcc_s.so.1 issue.  I always use oceanscript to run spectre (but in oceanscript, it seems like it only has modelFile(---) for including model file)

    I did try to use Spectre to read directly the original BSIM3v3 (level=53) model file supplied by foundry (an old process that foundry doesn't have Spectre model file).   However, I only had very limited success.  The error messages are all over the spectrum when Spectre was trying to read this foundry-supplied model file, depending on how I modified the syntax of this as-is file.    Is it true to say that Spectre cannot read as-is BSIM3v3 model file if it is running in IC5141?

    Mark

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  • Andrew Beckett
    Andrew Beckett over 9 years ago

    Hi Mark,

    No, spectre should be able to natively read the model without you having to convert it. The fact that you are using IC5141 is irrelevant because it's the simulator that's reading it (assuming you really are using spectre from MMSIM141 which should be clear from the log file). Make sure that the file has a suffix other than ".scs" (.scs implies spectre syntax, anything else implies SPICE).

    Perhaps you should contact customer support so that we can take a look at the problems via a webex session with you?

    Regards,

    Andrew.

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  • marklin
    marklin over 9 years ago

    Thanks again, Andrew.

    It is embarrassing to say that "Yes, I goofed since Spectre was pointing to IC5141".  After redirecting it back to MSIM141, everything is working like a charm.  The oceanscript is identical to the one that I usually run Spectre simulation except that modelFile(--) was pointing to the as-is SPICE model file.

    Mark

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  • Andrew Beckett
    Andrew Beckett over 9 years ago

    Mark - no worries. It's very easy for this to happen - I understand!

    Regards,

    Andrew.

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