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Simulators >> Circuit Simulators >> Syntax (or ADE XL Commands) to Specify Saving of AHDL Variables
https://designers-guide.org/forum/YaBB.pl?num=1436579735

Message started by Matthew Spencer on Jul 10^th, 2015, 6:55pm

Title: Syntax (or ADE XL Commands) to Specify Saving of AHDL Variables
Post by Matthew Spencer on Jul 10^th, 2015, 6:55pm

Hi everyone,

I'm running a Spectre simulation that contains many Verilog-A modules each of which has many internal variables. I'm trying to save only a subset of those variables in order to save memory and run time.

In the past I've run similar simulations by setting 'saveOptions saveahdlvars=all' through the 'ADE XL -> Editor Window -> Outputs -> Save All ... -> AHDL vars -> save all' check box. I'd like to use the 'save selected' check box and then specify the variables to save using either an entry in the 'Outputs' Setup table in ADE XL or an included Spectre file with a save statement (preferably the output table).

Unfortunately, I haven't found any documentation about how to specify an ADHL variable in a save statement or ADE XL. Does anyone know the right syntax to use for this?

Title: Re: Syntax (or ADE XL Commands) to Specify Saving of AHDL Variables
Post by Matthew Spencer on Jul 15^th, 2015, 3:57pm

Hi everyone,

I figured this out and figured that I should post for posterity. There were three steps I had to take:

1. As expected, set the check box in 'ADE XL -> Editor Window -> Outputs -> Save All ... -> AHDL vars' to 'selected'

2. Write a Spectre file that specified which values to save, example below:

Code:

save I32<200>:variable_name
save I18<1>:variable_name
...

3. Include the Spectre file useing 'ADE XL -> Editor Window -> Setup -> Model Libraries'

My guess for the syntax to use in step two was based on this document: http://www.eecs.tufts.edu/~ryun01/gmid_ruida.pdf , and it worked. So thanks to the authors!

Title: Re: Syntax (or ADE XL Commands) to Specify Saving of AHDL Variables
Post by Ken Kundert on Jul 16^th, 2015, 11:06am

Thanks Matthew!