TZCNT (R16, R16) - Throughput and Uops (IACA 3.0)

With different registers for different operands

With 1 independent instruction

Throughput Analysis Report
--------------------------
Block Throughput: 0.98 Cycles       Throughput Bottleneck: Dependency chains
Loop Count:  60
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  |             |             |      |      |      |      | tzcnt r8w, r9w
Total Num Of Uops: 1

With 12 independent instructions

Throughput Analysis Report
--------------------------
Block Throughput: 11.95 Cycles       Throughput Bottleneck: Backend
Loop Count:  22
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  |             |             |      |      |      |      | tzcnt r8w, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt r10w, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt r11w, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt r12w, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt r13w, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt r14w, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt bx, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt cx, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt dx, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt di, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt si, r9w
|   1      |             | 1.0  |             |             |      |      |      |      | tzcnt bp, r9w
Total Num Of Uops: 12

With the same register for for different operands

Throughput Analysis Report
--------------------------
Block Throughput: 2.96 Cycles       Throughput Bottleneck: Backend
Loop Count:  77
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  |             |             |      |      |      |      | tzcnt r8w, r8w
Total Num Of Uops: 1