TZCNT (R16, R16) - Throughput and Uops (IACA 2.1)
With different registers for different operands
With 1 independent instruction
Throughput Analysis Report
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Block Throughput: 8.00 Cycles Throughput Bottleneck: InterIteration
Port Binding In Cycles Per Iteration:
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| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
---------------------------------------------------------------------------------------
| Cycles | 0.0 0.0 | 1.0 | 0.5 0.5 | 0.5 0.5 | 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 | |
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| 2 | | 1.0 | 0.5 0.5 | 0.5 0.5 | | | | | CP | tzcnt r8w, r9w
Total Num Of Uops: 2
With 12 independent instructions
Throughput Analysis Report
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Block Throughput: 96.00 Cycles Throughput Bottleneck: InterIteration
Port Binding In Cycles Per Iteration:
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| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
---------------------------------------------------------------------------------------
| Cycles | 0.0 0.0 | 12.0 | 6.0 6.0 | 6.0 6.0 | 0.0 | 0.0 | 0.0 | 0.0 |
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| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 | |
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| 2 | | 1.0 | 1.0 1.0 | | | | | | CP | tzcnt r8w, r9w
| 2 | | 1.0 | | 1.0 1.0 | | | | | CP | tzcnt r10w, r9w
| 2 | | 1.0 | 1.0 1.0 | | | | | | CP | tzcnt r11w, r9w
| 2 | | 1.0 | | 1.0 1.0 | | | | | CP | tzcnt r12w, r9w
| 2 | | 1.0 | 1.0 1.0 | | | | | | CP | tzcnt r13w, r9w
| 2 | | 1.0 | | 1.0 1.0 | | | | | CP | tzcnt r14w, r9w
| 2 | | 1.0 | 1.0 1.0 | | | | | | CP | tzcnt bx, r9w
| 2 | | 1.0 | | 1.0 1.0 | | | | | CP | tzcnt cx, r9w
| 2 | | 1.0 | 1.0 1.0 | | | | | | CP | tzcnt dx, r9w
| 2 | | 1.0 | | 1.0 1.0 | | | | | CP | tzcnt di, r9w
| 2 | | 1.0 | 1.0 1.0 | | | | | | CP | tzcnt si, r9w
| 2 | | 1.0 | | 1.0 1.0 | | | | | CP | tzcnt bp, r9w
Total Num Of Uops: 24
With the same register for for different operands
Throughput Analysis Report
--------------------------
Block Throughput: 8.00 Cycles Throughput Bottleneck: InterIteration
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 | 0.5 0.5 | 0.5 0.5 | 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 | |
---------------------------------------------------------------------------------
| 2 | | 1.0 | 0.5 0.5 | 0.5 0.5 | | | | | CP | tzcnt r8w, r8w
Total Num Of Uops: 2
With the -no_interiteration flag
Throughput Analysis Report
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Block Throughput: 1.00 Cycles Throughput Bottleneck: Port1
Port Binding In Cycles Per Iteration:
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| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
---------------------------------------------------------------------------------------
| Cycles | 0.0 0.0 | 1.0 | 0.5 0.5 | 0.5 0.5 | 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 | |
---------------------------------------------------------------------------------
| 2 | | 1.0 | 0.5 0.5 | 0.5 0.5 | | | | | CP | tzcnt r8w, r9w
Total Num Of Uops: 2