Some data types in Verilog, such as reg, are 4-state. This means that each bit can be one of 4 values: 0,1,x,z. With the "case equality" operator, ===, x's are compared, and the result is 1. With ==, the result of the comparison is not 0, as you stated; rather, the result is x, according to the IEEE Std (1800-2009), section 11.4.5 "Equality operators": For the logical equality and logical ...
What are the +: and -: Verilog/SystemVerilog operators? When and how do you use them? For example:
What is the difference between = and <= in Verilog? Asked 10 years, 2 months ago Modified 3 years, 3 months ago Viewed 113k times
verilog - What is the difference between single (&) and double ...
26 "<=" in Verilog is called non-blocking assignment which brings a whole lot of difference than "=" which is called as blocking assignment because of scheduling events in any vendor based simulators.
Double asterisk is a "power" operator introduced in Verilog 2001. It is an arithmetic operator that takes left hand side operand to the power of right hand side operand.
The lesson is to use the reg & wire types in classic Verilog, or the bit & logic types in modern Verilog, and size your signals appropriately. (Be warned, those types aren't equivalent)
Verilog bitwise or ("|") monadic Asked 12 years, 6 months ago Modified 12 years, 6 months ago Viewed 36k times
What does the caret sign (^) mean in the Verilog hdl language? In a formula in verilog with inputs a and b and output c, what would c = a ^ b mean?