Verilog Integer?

Question

How do you use integers in Verilog?

Answer 1

If you are asking about variables of the integer data type I use:

- for loop variables of for loops,
- implicitly as a localparams and parameters - for ranges, borders, settings etc

If you are asking about integer literals then I use it as integer literals (or constants as its named in the Verilog standard) - in expressions and equations. I use it in various formats: decimal (just 113 for example), based (2'b01, 3'd7, 16'h0123) which is composed of up to three tokens - an optional size constant, an apostrophe character (', ASCII 0x27) followed by a base format character, and the digits representing the value of the number.

localparam size = 32;
next_addr = addr + 16'h24;
case (x)
  3'b001: ...
  3'b010: ...
  ...

Answer 2

The "int" is used for 32-bit integer data types. However "shortint" and "longint" will also be used as integer but for 16 and 64 bit respectively. All of these are signed integers.