bug while parsing sdf file for annotation

Antonio Strollo

Dsim fail with the attached example, as follows:

dsim  -top tb_test  -sdf-verbose  -timescale 1ns/1ps  tb_test.sv
=N:[UsageMeter (2025-02-04 15:00:09 +0100)] usage server initial connection
=N:[License]
Licensed for Metrics Design Automation.
=N:[License] New lease granted.
Analyzing...
Elaborating...
  Top-level modules:
    $unit
    tb_test
  Found 6 unique specialization(s) of 6 design element(s).
=F:[SdfParseError]:
    Parser errors encountered at the following locations:    

    netlist.sdf:16:19    expected 'IDENTIFIER' instead of 'e'    

  Altair DSim version: 20240923.5.0 (b:R #c:0 h:e17d082b08 os:ubuntu_22.04)

The error disappears if another name (different from 'e') is used for the port of the module test.

netlist.sdf

tbtest.sv

Shaun_Altair

Hi Antonio,

`e` is being treated as a key word. In the SDF documentation, it shows up in the definition of a real number as the exponential (reference A.1.7 Fundamental lexical elements in "IEEE 1497 ™ Delay and power calculation standards –
Part 3: Standard Delay Format (SDF) for the electronic design process"):

integer ::= decimal_digit { decimal_digit }
real_number ::=
integer
| integer [ . integer ]
| integer [ . integer ] e [ sign ] integer

I'll file a bug report and keep you posted. Fow now, you already know the workaround of using another identifier besides `e`.

Shaun_Altair

@Antonio Strollo DSim 2025.0.1 fixes this issue and can be downloaded from Altair Marketplace here:

https://altairone.com/Marketplace?queryText=dsim&tab=Download&app=DSim

If you don't want the installer to overwrite your existing DSim installation, please make sure to change the default installation path.