RCL (R32, I8) - Throughput and Uops (IACA 2.3)
With 1 independent instruction
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 | 0.8 0.0 | 0.8 | 0.0 0.0 | 0.0 0.0 | 0.0 | 0.8 | 0.8 | 0.0 |
---------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 | |
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| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcl r8d, 0x2
Total Num Of Uops: 3
With additional dependency-breaking instructions
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 | 0.9 0.0 | 1.0 | 0.0 0.0 | 0.0 0.0 | 0.0 | 1.0 | 1.0 | 0.0 |
---------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 | |
---------------------------------------------------------------------------------
| 3 | 0.8 | 0.8 | | | | 0.6 | 0.8 | | CP | rcl r8d, 0x2
| 1 | 0.2 | 0.2 | | | | 0.3 | 0.2 | | | test r15, r15
Total Num Of Uops: 4
With 13 independent instructions
Throughput Analysis Report
--------------------------
Block Throughput: 37.14 Cycles Throughput Bottleneck: Dependency chains (possibly between iterations)
Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
---------------------------------------------------------------------------------------
| Cycles | 9.8 0.0 | 9.8 | 0.0 0.0 | 0.0 0.0 | 0.0 | 9.8 | 9.8 | 0.0 |
---------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 | |
---------------------------------------------------------------------------------
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl r8d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl r9d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl r10d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl r11d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl r12d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl r13d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl r14d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl ebx, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl ecx, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl edx, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl edi, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl esi, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | | rcl ebp, 0x2
Total Num Of Uops: 39
With additional dependency-breaking instructions
Throughput Analysis Report
--------------------------
Block Throughput: 13.00 Cycles Throughput Bottleneck: FrontEnd
Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
---------------------------------------------------------------------------------------
| Cycles | 13.0 0.0 | 13.0 | 0.0 0.0 | 0.0 0.0 | 0.0 | 13.0 | 13.0 | 0.0 |
---------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 | |
---------------------------------------------------------------------------------
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl r8d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl r9d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl r10d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl r11d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl r12d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl r13d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl r14d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl ebx, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl ecx, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl edx, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl edi, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl esi, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcl ebp, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
Total Num Of Uops: 52