EECS/CSE 31L Midterm Project — 32bits Enhanced ALU
Usage
Download:
git clone https://github.com/M0gician/32bits_Enhanced_ALU
Then open the 32bits_Enhanced_ALU.xpr in Vivado :)
ALU Description
| Op-Code | Micro-Operation | Description |
|---|---|---|
| 0000 | A + B | Addition |
| 0001 | A + B + 1 | Subtraction |
| 0010 | A + 1 | Increment |
| 0011 | A - 1 | Decrement |
| 0100 | A | Move |
| 0101 | shl | 1-bit logical shift left of A |
| 0110 | SIMD A + B | Four 8-bits Add |
| 0111 | A & B | Bitwise AND |
| 1000 | A | B | Bitwise OR |
| 1001 | A ⊕ B | Bitwise XOR |
| 1010 | ¬A (A') | Complement |
| 1010 | A + 1 | 2's Complement |
Flags
- Carry Flag: Only in ADD operation is set when you have carry out on Left-most bit (MSB)
- Overflow Flag: Only in ADD or SUB operations is set when addition of two positive numbers results in negative number or vice-versa.
- Sign Flag: Only in ADD or SUB operations is set when the output is a negative number.
- Zero Flag: Is set when the output is zero.