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The inputs to an ALU are the data to be operated on, called operands, and a code indicating the operation to be performed and, optionally, status information from a previous operation the ALU's output is the result of the performed operation. A single CPU, FPU or GPU may contain multiple ALUs. An ALU is a fundamental building block of many types of computing circuits, including the central processing unit (CPU) of computers, FPUs, and graphics processing units (GPUs). This is in contrast to a floating- point unit (FPU), which operates on floating point numbers. Verilog Code For Serial Adder With Accumulators An arithmetic logic unit (ALU) is a combinationaldigital electronic circuit that performs arithmetic and bitwise operations on integerbinary numbers. Control signals enter from the left and status signals exit on the right data flows from top to bottom. Each arrow represents one or more signals. A symbolic representation of an ALU and its input and output signals, indicated by arrows pointing into or out of the ALU, respectively. The only difference between circuits of Mealy and Moore type FSM for serial adder is that in Moore type FSM circuit, output signal s is passed through an extra flip-flop and thus delayed by one clock cycle with respect to the Mealy type FSM circuit.Verilog Code For Serial Adder With Accumulator DryerĪrithmetic logic unit - Wikipedia. S = y 1 Fig: State table for the Moore type serial adder FSM Fig: State-assigned table for the Moore type serial adder FSM Fig: Circuit for Moore type serial adder FSM
![n bit serial adder with accumulator verilog code n bit serial adder with accumulator verilog code](https://d2vlcm61l7u1fs.cloudfront.net/media/a4f/a4f9f939-4f2c-4ca8-8f22-8728271171ed/phpLTir1l.png)
Fig: State Diagram for Moore type serial adder FSM
![n bit serial adder with accumulator verilog code n bit serial adder with accumulator verilog code](http://www.aoki.ecei.tohoku.ac.jp/arith/mg/image/n_rca.gif)
Therefore we will four states namely: G 0, G 1, H 0 and H 1.
![n bit serial adder with accumulator verilog code n bit serial adder with accumulator verilog code](https://media.cheggcdn.com/study/c68/c68f9528-4445-4cdf-b1fd-dd7dcc8eac1f/037319a2-ec9d-489d-8fcf-8728c85972c4.png)
Since in both states, G and H, it is possible to produce two different outputs depending on the valuations of the inputs a and b, a Moore type FSM will need more than two states. In a Moore type FSM, output depends only on the present state. The flip-flop can be cleared by the Reset signal at the start of the addition operation. S = a ⊕ b ⊕ y Fig: State table for the Mealy type serial adder FSM Fig: State-assigned table for the Mealy type serial adder FSM Fig: Circuit for Mealy type serial adder FSM
![N bit serial adder with accumulator verilog code](https://kumkoniak.com/70.jpg)