[ibis-macro] Re: upcoming Verilog-AMS LRM change impacts array syntax
- From: "Muranyi, Arpad" <arpad.muranyi@xxxxxxxxx>
- To: <kwillis@xxxxxxxxxxx>, <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 29 Nov 2005 13:35:26 -0800
Maybe we could define a (Verilog-AMS) macro which
is an empty text for previous versions and a back
tick for the newer versions:
'ifdef __VAMS_LRM2.3
`define BackTick `
`else
`define BackTick
`endif
I_pc[1:IVpc_length] = `BackTick{ 0.08, 0.00, 0.00, 0.00},
This needs to be tested, though, I am not sure
if it will work...
Arpad
=================================================
________________________________
From: Muranyi, Arpad
Sent: Tuesday, November 29, 2005 1:28 PM
To: 'kwillis@xxxxxxxxxxx'; ibis-macro@xxxxxxxxxxxxx
Subject: RE: [ibis-macro] upcoming Verilog-AMS LRM change impacts array syntax
Ken,
Not a bad idea, except that it would duplicate all
of the data, which can become ugly if you have 1000
point Vt tables... Is there a better way to do it?
Arpad
===================================================
________________________________
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]
On Behalf Of Ken Willis
Sent: Tuesday, November 29, 2005 1:25 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] upcoming Verilog-AMS LRM change impacts array syntax
Hi,
I got the information from our Spectre team that the array syntax will change
in the next release of
Verilog-AMS LRM (version 2.3), likely in 2h06. For example in the IBIS_OpenSink
model you have:
parameter real
I_pc[1:IVpc_length] = { 0.08, 0.00, 0.00, 0.00},
V_pc[1:IVpc_length] = {-5.00, -1.00, 5.00, 10.00},
I_pd[1:IVpd_length] = {-0.10, 0.00, 0.10, 0.20},
V_pd[1:IVpd_length] = {-5.00, 0.00, 5.00, 10.00},
I_gc[1:IVgc_length] = {-0.08, 0.00, 0.00, 0.00},
V_gc[1:IVgc_length] = {-5.00, -1.00, 5.00, 10.00};
The syntax will be changed from:
{-5.00, -1.00, 5.00, 10.00};
to
'{-5.00, -1.00, 5.00, 10.00};
With the backtick added. This is being done to comply with SystemVerilog.
One suggestion was to consider supporting a macro so that the building blocks
would work with LRM2.2 compliant simulators and LRM2.3 compliant simulations,
for example:
e.g;
'ifdef __VAMS_LRM2.3
parameter real
I_pc[1:IVpc_length] = '{ 0.08, 0.00, 0.00, 0.00},
V_pc[1:IVpc_length] = '{-5.00, -1.00, 5.00, 10.00},
I_pd[1:IVpd_length] = '{-0.10, 0.00, 0.10, 0.20},
V_pd[1:IVpd_length] = '{-5.00, 0.00, 5.00, 10.00},
I_gc[1:IVgc_length] = '{-0.08, 0.00, 0.00, 0.00},
V_gc[1:IVgc_length] = '{-5.00, -1.00, 5.00, 10.00};
`else
parameter real
I_pc[1:IVpc_length] = { 0.08, 0.00, 0.00, 0.00},
V_pc[1:IVpc_length] = {-5.00, -1.00, 5.00, 10.00},
I_pd[1:IVpd_length] = {-0.10, 0.00, 0.10, 0.20},
V_pd[1:IVpd_length] = {-5.00, 0.00, 5.00, 10.00},
I_gc[1:IVgc_length] = {-0.08, 0.00, 0.00, 0.00},
V_gc[1:IVgc_length] = {-5.00, -1.00, 5.00, 10.00};
`endif
Something to think about.
thanks,
Ken Willis
Cadence Design Systems
270 Billerica Road
Chelmsford, MA 01824
(978) 262-6540
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