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What is the difference between == and === in Verilog?

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 ...

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verilog - What is `+:` and `-:`? - Stack Overflow

5.2.1 Vector bit-select and part-select addressing Bit-selects extract a particular bit from a vector net, vector reg, integer, or time variable, or parameter. The bit can be addressed using an expression. If the bit-select is out of the address bounds or the bit-select is x or z , then the value returned by the reference shall be x . A bit-select or part-select of a scalar, or of a variable ...

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What is the difference between = and <= in Verilog?

What is the difference between = and <= in Verilog? Asked 9 years, 9 months ago Modified 2 years, 11 months ago Viewed 112k times

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<= Assignment Operator in Verilog - Stack Overflow

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.

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vhdl - Verilog question mark (?) operator - Stack Overflow

I'm trying to translate a Verilog program into VHDL and have stumbled across a statement where a question mark (?) operator is used in the Verilog program. The following is the Verilog code; 1 m...

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verilog - What is the difference between single (&) and double ...

In IEEE 1800-2005 or later, what is the difference between & and && binary operators? Are they equivalent? I noticed that these coverpoint definitions behave identically where a and b ...

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operator in verilog - Stack Overflow

10 i have a verilog code in which there is a line as follows: parameter ADDR_WIDTH = 8 ; parameter RAM_DEPTH = 1 << ADDR_WIDTH; here what will be stored in RAM_DEPTH and what does the << operator do here.

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Verilog ** Notation - Stack Overflow

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.

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Verilog bitwise or ("|") monadic - Stack Overflow

Verilog bitwise or ("|") monadic Asked 12 years, 1 month ago Modified 12 years, 1 month ago Viewed 36k times

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system verilog - Indexing vectors and arrays with - Stack Overflow

Description and examples can be found in IEEE Std 1800-2017 § 11.5.1 "Vector bit-select and part-select addressing". First IEEE appearance is IEEE 1364-2001 (Verilog) § 4.2.1 "Vector bit-select and part-select addressing". Here is an direct example from the LRM: logic [31: 0] a_vect; logic [0 :31] b_vect; logic [63: 0] dword; integer sel; a_vect[ 0 +: 8] // == a_vect[ 7 : 0] a_vect[15 -: 8 ...