Friday, February 6, 2009, 06:43 AM - The verification hood

Or better put, to randomize a variable with constraints anywhere you want, use std::randomize() as shown below:
module x(); int y; initial begin std::randomize(y) with {y<5; y>2;}; $display(y); end endmodule

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Thursday, January 29, 2009, 01:11 AM - The verification hood

module x(); logic[3:0] a = 4'b0x10; logic[3:0] b = 4'bz011; initial begin if (^a === 'x) $display("a contains x or z"); if (^b === 'x) $display("b contains x or z"); // note that only xor always works, but not "or" or "and" if (|a === 'x) $display("this will not detect the x"); end endmodule

See also here

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Wednesday, January 28, 2009, 10:21 PM - The verification hood

module x(); real t=10.0; initial // either... t = t**0.5; // or... t = $sqrt(t); endmodule

The first option, which doesn't use a system function call, is probably slightly more efficient...

see other arithmatic functions here

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