TZCNT (R16, R16) - Throughput and Uops (IACA 2.3)

With different registers for different operands

With 1 independent instruction

Throughput Analysis Report
--------------------------
Block Throughput: 1.00 Cycles       Throughput Bottleneck: FrontEnd

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 0.0    0.0  | 1.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 0.0  | 0.0  | 0.0  |
---------------------------------------------------------------------------------------


| Num Of |                    Ports pressure in cycles                     |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r8w, r9w
Total Num Of Uops: 1

With 12 independent instructions

Throughput Analysis Report
--------------------------
Block Throughput: 12.00 Cycles       Throughput Bottleneck: Backend. Port1

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 0.0    0.0  | 12.0 | 0.0    0.0  | 0.0    0.0  | 0.0  | 0.0  | 0.0  | 0.0  |
---------------------------------------------------------------------------------------


| Num Of |                    Ports pressure in cycles                     |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r8w, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r10w, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r11w, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r12w, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r13w, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r14w, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt bx, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt cx, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt dx, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt di, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt si, r9w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt bp, r9w
Total Num Of Uops: 12

With the same register for for different operands

Throughput Analysis Report
--------------------------
Block Throughput: 2.86 Cycles       Throughput Bottleneck: FrontEnd

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 0.0    0.0  | 1.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 0.0  | 0.0  | 0.0  |
---------------------------------------------------------------------------------------


| Num Of |                    Ports pressure in cycles                     |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    |           | 1.0 |           |           |     |     |     |     | CP | tzcnt r8w, r8w
Total Num Of Uops: 1