property LatencyCheck; @(posedge clk) disable iff (rst) ((req_type == INIT) || (req_type == FLUSH)) |-> (block_latency < MAX_LATENCY); endproperty LatencyCheck_A: assert property(LatencyCheck); // interrupt sho
module sirv_gnrl_xchecker # ( parameter DW= 32 ) ( input [DW-1:0] i_dat, input clk ); CHECK_THE_X_VALUE: assert property (@(posedge clk) ((^(i_dat)) !== 1'bx) ) else $fatal ("\n Error: Oops, detected a X value!!! This should never happen. \n"); endmodule ...
(1'b0) , // Read enable 102 .oe_1 (rd_en) // output enable 103 ); 104 105 // Add assertion here 106 // psl default clock = (posedge clk); 107 // psl ERRORwritefull: assert never {full && wr_en && wr_cs}; 108 // psl ERRORreadempty: assert never {empty && rd_en && ...
System Verilog assertions: Assertion definition, assertion benefits, system Verilog assertion types, immediate assertions, concurrent assertions, assert and cover properties and labels, overlapping and non-overlapping implications, edge testing functions, sequences, Vacuous success, property styles, System ...
things like temporal logic, sophisticateddesign verificationcapabilities, a dynamicAPI, and the concept of assertions that are key to theformal verificationstrategy known as model checking. (VHDL already had a simple assert construct, but the original Verilog had nothing to boast about in this area....
// Define a property to specify that an ack should be// returned for every grant within 1:4 clockspropertyp_ack;@(posedgeclk)gnt ##[1:4]ack;endpropertyassertproperty(p_ack);// Assert the given property is true always Click here to learn more on Concurrent Assertions ...
assert_never : Prints error whenever a read happens with the fifo empty flag set assert_increment : Prints error whenever the write pointer increments by a value > 1 We can set the various parameters for each assertion to get the desired function; for assert_fifo_index, the parameters that ...
assert_never_unknown_async.vlib...\...\assert_next.vlib...\...\assert_no_overflow.vlib...\...\assert_no_transition.vlib...\...\assert_no_underflow.vlib...\...\assert_odd_parity.vlib...\...\assert_one_cold.vlib...
Example 66 assert property(@(posedge clk) sync_accept_on (retry) a |=> sync_reject_on(bad) b[*2]); November 4, 2013 HVC2013 67 One More example • reject_on(rst) 1[*3] • Property 1[*3] can never fail • Therefore, reject_on(rst) 1[*3] fails iff rst becomes high ...
a_3: assert property(@(posedge clk) p) ; //Not allowed Below sequence checks that if signal “a” is high on a given positive edge of the clock, then after 2 clock cycles, signal “b” shall not be high. The keyword “not” is used to specify that the property should never be ...