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ac-is:lab-ie:lab01 [2023/11/07 22:30] ionut.pascal [Home assignment] |
ac-is:lab-ie:lab01 [2023/11/07 22:46] (current) ionut.pascal [Home assignment] |
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| * //Hint//: Take as reference the adder8 module. | * //Hint//: Take as reference the adder8 module. | ||
| * //Hint//: What is the size of the output? Consider the highest 8bit number. | * //Hint//: What is the size of the output? Consider the highest 8bit number. | ||
| - | - **(4p)** Implement a tiny ALU (**A**rithmetical **L**ogical **U**nit), that shall be able to execute 16bit ADD and SUB operations. The ALU has 2 inputs, op1 (16bits) and op2(16bits) and 2 outputs, result(16bits) and carry(1bit). | + | - **(4p)** Implement a tiny ALU (**A**rithmetical **L**ogical **U**nit), that shall be able to execute 16bit ADD and SUB operations. The ALU has 3 inputs, op1 (16bits), op2(16bits), sel(1bit) and 2 outputs, result(16bits) and carry(1bit). |
| + | * //Hint//: Sel input selects the operation that is executed: 0 - ADD, 1 - SUB | ||
| * //Hint//: You can use the concatenate operator { } in order to make the result a 17bit variable! | * //Hint//: You can use the concatenate operator { } in order to make the result a 17bit variable! | ||
| * //Note//: When you operate the ALU inside a CPU, you have a fixed length bus available for all the data. | * //Note//: When you operate the ALU inside a CPU, you have a fixed length bus available for all the data. | ||
