In the below example, Constrain_mode is called as method to see to the enable/disable status of constraint. class packet; rand bit [3:0] addr; constraint addr_range { addr inside {5,10,15}; } endclass module static_constr; initial begin packet pkt; pkt = new(); $display("Before ...
In the example below, a previous example problem is solved using soft constraints, Constraint declared inside the class will get suppressed by inline constraints. class packet; rand bit [3:0] addr; constraint addr_range { soft addr > 6; } endclass module soft_constr; initial begin packet pk...
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...
For example, [1] $countbits (expression, '1, '0) returns the number of bits in expression having values 1or 0. $countbits (expression, 'x, 'z) returns the number of bits in expression having values X. or Z. Ben Cohen http:/...
RPM_GRID Coordinates VHDL Example Setting a Property to Invoke the RPM_GRID System RPM_GRID Coordinate Values Defining RLOC Properties Directly in the RTL Source File Assigning a Fixed Location to an RPM XDC Macros Specifying Macros create_macro update_macro delete_macros get_macros...
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:...
Hi there, We are implementing a DDR link with the clock arriving in the middle of the data eye from an external chip. The design docs and Verilog souces (open source) can be found here:
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...
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...
Consider the following example: current_design top set_case_analysis -name in -value 0 set_case_analysis -name in -value 1 For the above example, SpyGlass considers only the last set_case_analysis constraint specification and ignores the first constraint specification that sets the value of the...