Operands are determined before RENAMING!
| Status | Dst | Op1 | V | Op2 | V
0 | Full | 0 | 0 | T | 25 | T
1 | Full | 1 | 0 | F | 30 | T
This is the NEW renamed register number for R8
This is the OLD renamed register number for R8
Note that the ROB status for instr A changed from issued_valid to issued_invalid. When instr A finishes, the ROB status will change to finished_invalid. ROB entries with status finished_invalid ARE not written to regfile!!!