Static Constraints in SystemVerilog static constraints example syntax disable static constraints turn off static and non static constraint example
Functions in Constraints In some cases constraint can’t be expressed in a single line, in such cases function call can be used to constrain a random variable. calling the function inside the constraint is referred to as function in constraints. The function will be written outside the constrai...
:/ weight :The :/ operator divides the value of weight and assigns equally among all elements in the range. If there are n values in the range, the weight of each value is range_weight/n. (weight may be any Systemverilog expression). Example : Distributions 1programdistribution;2classfram...
For example if I have the following constraints: 1. soft a == 10 2. a == 5 3. soft b inside 10 to 20 4. b inside 20 to 30 The resolution of these constraints are "a = 5 and b = 20" In the first case constraint 1 is contradicted by constraint 2 so the second and non-so...
Example Shown in the example below is asoftconstraint that tells the solver to produce values within 4 and 12 for the variable calleddata. classABC;randbit[3:0]data;// This constraint is defined as "soft"constraintc_data{soft data>=4;data<=12;}endclassmoduletb;ABC abc;initialbeginabc=...
There is a real need to verify timing constraints much earlier in the design flow, so that we are not caught by surprise later during implementation/STA. For example - During silicon testing: The silicon may not meet timing, because of optimistic “defaults” in various tools During STA:...
The terms CRV and CDV go hand in hand. CRV generates all sort of random traffic and CDV measures its effectiveness in terms of functionality covered. The HDVL SystemVerilog has a fairly rich set of constructs to support both Constraints and Coverage. The idea here is to generate the input ...
To retain the parameter value in the SystemVerilog environment use a Simulink.Parameter. In that parameter, the default value is 2100 and the valid range is [0, 4936]. (The pulse must be entirely within the frame of 5000 samples.) In the generated UVM code, two constraints are placed on...
InNon-ProjectMode,youmustreadeachfileindividuallybeforeexecutingthecompilation commands. TheexamplescriptbelowshowshowtouseoneormoreXDCfilesforsynthesisand implementation. ExampleScript: read_verilog[globsrc/*.v] read_xdcwave_gen_timing.xdc read_xdcwave_gen_pins.xdc synth_design-topwave_gen-partxc7k325...
Figure below shows an example of how you can create a timing constraint file to constrain the IP clocks. Figure 58.Timing Constraint Example The example above consists of the following Verilog modules: TOP.v—The top level design module which contains anIntel®FPGA PLL and a user-defined ins...