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Archive for May, 2013

System Verilog Queues which can shrink and grow !

Saturday, May 18th, 2013

Dear Readers,

System Verilog has new data type called ‘queue’ which can grow and shrink. With SV queue, we can easily add and remove elements anywhere that is the reason we say it can shrink and grow as we need. Queues can be used as LIFO (Last In First Out) Buffer or FIFO (First In First Out) type of buffers.

Each element in the queue is identified by an ordinal number that represents its position within the queue, with 0 representing the first element and $ represents the last element.

The size of the queue is variable similar to dynamic array but queue may be empty with zero element and still its a valid data structure.

Lets take a few examples to understand queue operation with different methods we have in system verilog.

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Verilog to System Verilog : A Successful journey towards SV

Wednesday, May 1st, 2013

Dear Readers,

We have been using standard languages and methodologies for ASIC/FPGA design and Verification activities. We as an engineer must know on history of verification activities. Today we mostly work on verification standard languages like System Verilog. The whole industry is moving to accept this language with few methodologies (RVM, VMM, AVM, OVM, UVM etc…) as their standards for new and existing product development and verification.

Now since we use the industry standard languages like VHLD, Verilog, and System Verilog, we must know and understand history and importance of Verification languages. 

Let’s understand how we reached to a System Verilog usage? What are the other different verification languages engineers were using in past few decades? How did they start their usage from Verilog to System Verilog for verification? Let’s go back to history and understand these questions.

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