Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
Announcements
FPGA community forums and blogs on community.intel.com are migrating to the new Altera Community and are read-only. For urgent support needs during this transition, please visit the FPGA Design Resources page or contact an Altera Authorized Distributor.
17267 Discussions

Arithmetics on Virtual Signals in Modelsim

Altera_Forum
Honored Contributor II
‎06-14-2013 11:44 AM
1,312 Views

Hi guys, 

Can I in some way do arithmetic on signals I'm viewing in ModelSim? 

 

F.x. I have two signals  

signalA(7 downto 0) 

signalB(7 downto 0) 

 

and in ModelSim I want to view a wave form 

mySignal = unsigned(signalA) - unsigned(signalB) 

 

i don't want to change the vhdl code. this is only for testing and simulation 

 

my idea was to use virtual signals and then do arithmetics on them.... 

virtual signal {sim:/testbench/DUT/DataChannelInst/signalA} signalA 

virtual signal {sim:/testbench/DUT/DataChannelInst/signalB} signalB 

# Then somehow 

mySignal = signalA - signalB 

# and  

add wave mySignal 

 

Any ideas and sugestion greatly appreciated q:o) 

 

Cheers 

Stefan
0 Kudos

Link Copied

2 Replies
Altera_Forum
Honored Contributor II
‎06-14-2013 12:13 PM
480 Views

Use virtual function. 

virtual function {signalA - signalB} mySignal
0 Kudos
Copy link
Altera_Forum
Honored Contributor II
‎06-14-2013 01:32 PM
480 Views

Cool, works  

 

 

--- Quote Start ---  

Use virtual function. 

virtual function {signalA - signalB} mySignal 

--- Quote End ---  

0 Kudos
Copy link
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.