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. 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.
What is the difference between = and <= in Verilog?
2016年2月16日 · <= is a nonblocking assignment. It is used to describe sequential logic, like in your code example. Refer to IEEE Std 1800-2012, section 10.4.2 "Nonblocking procedural assignments".
<= Assignment Operator in Verilog - Stack Overflow
2018年8月22日 · "<=" 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. It is Recommended to use non-blocking assignment for sequential logic and blocking assignment for combinational logic, only then it infers correct ...
verilog - What is `+:` and `-:`? - Stack Overflow
Normal part selects in Verilog require constants. So attempting the above with something like dword[i+7:i] is not allowed. So if you want to select a particular byte using a variable select, you can use the indexed part select.
verilog - What is the difference between single (&) and double ...
2013年6月26日 · This isn't quite correct. In Verilog, a vector (or any other) object is 'true' if it is non-zero, and it is known - in other words, it does not contain x/z metavalues. So, it's not 'tested for equality to 0'. @VL: try not to combine Verilog and SV questions - they're different languages. You wouldn't ask a C question in a C++ group, or vice-versa.
Verilog ** Notation - Stack Overflow
2017年5月24日 · 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. In other words, X ** Y raises X to the power of Y .
Assign a synthesizable initial value to a reg in Verilog
2012年4月4日 · The always @* would never trigger as no Right hand arguments change. Why not use a wire with assign? module top ( input wire clk, output wire [7:0] led ); wire [7:0] data_reg ; assign data_reg = 8'b10101011; assign led = data_reg; endmodule
verilog - What does always block @ (*) means? - Stack Overflow
Verilog: Difference between `always` and `always @*` 10. always @* block with a single non-blocking ...
Multiple conditions in If statement Verilog - Stack Overflow
2020年5月9日 · For someone who stumbles upon this question looking for a syntax reference, following are the excerpts from the sections "4.1.9 Logical operators" and "9.4 Conditional statement" in one of the revisions of the Verilog standard. This is syntax of if statement:
system verilog - Indexing vectors and arrays with - Stack Overflow
Verilog: Better syntax for many cases in a case structure. 2. Non-constant indexing for a logic statement ...