Key Elements - Register File, Shelving Buffers
| Status | Dst | Op1 | V | Op2 | V
0 | Empty | 0 | 0 | F | 0 | F
1 | Empty | 0 | 0 | F | 0 | F
2 | Empty | 0 | 0 | F | 0 | F
3 | Empty | 0 | 0 | F | 0 | F
4 | Empty | 0 | 0 | F | 0 | F
Shelving buffer will be managed as circular buffer. Head points to first free entry, tail points to oldest valid entry. Status is either empty or full. ‘V’ bits are valid bits for operands. ‘Dst’ field is renamed destination register (specifies a location in the reorder buffer). Shelving buffer also has an OPCODE entry that is NOT shown!!