Analyze and Simulate Options

Options are set with Set* commands and read with the matching Get* commands. A setting stays until it’s set again, so options for a whole project are best set once, at a high level: in a top-level script or in the settings files (Settings Files). Most option values are simulator specific; keep them out of the scripts that should run on every simulator.

Language and Time

• SetVHDLVersion sets the VHDLVHSIC Hardware Description Language version for analyze: 2008 (default), 2019, 2002 or 1993 (also as 08, 19, 02, 93). OSVVMOpen Source VHDL Verification Methodology’s libraries require 2008 or newer. GetVHDLVersion returns it.

• SetSimulatorResolution sets the simulator’s time resolution, in the simulator’s format (default ps). GetSimulatorResolution returns it.

SetVHDLVersion 2019
SetSimulatorResolution ps

puts "VHDL-[GetVHDLVersion]"

Analyze Options

Options passed to the simulator when it analyzes a file:

• SetVhdlAnalyzeOptions for VHDL files only, SetVerilogAnalyzeOptions for Verilog files only.

• SetExtendedAnalyzeOptions for both.

All three are empty by default.

Options given to a single analyze call apply to that file only.

if {$::osvvm::ToolVendor eq "Siemens"} {
  SetExtendedAnalyzeOptions "-quiet"
}

Simulate Options

SetExtendedSimulateOptions sets additional options of the user for every simulate. Options given to a single simulate call apply to that simulation only.

Simulators with separate steps have options per step:

• SetExtendedOptimizeOptions: the optimization step of Questa.

• SetExtendedElaborateOptions and SetExtendedRunOptions: the elaboration and run steps of GHDLG Hardware Design Language, NVC, VCS and Xcelium.

if {$::osvvm::ToolVendor eq "Siemens"} {
  SetExtendedSimulateOptions "-quiet"
}

GHDL

SetExtendedRunOptions "--ieee-asserts=disable-at-0"

NVC

SetExtendedElaborateOptions "-O1"
SetExtendedRunOptions       "--exit-severity=error"

NVC’s vendor script presets the run options to --exit-severity=failure; a new value replaces it.

Transcript

A build always writes a text log file. SetTranscriptType selects whether an HTMLHyperText Markup Language version is created too: html (default) or log. GetTranscriptType returns the setting.

SetTranscriptType log