RCL (R32, I8) - Throughput and Uops (IACA 3.0)
With 1 independent instruction
Throughput Analysis Report
--------------------------
Block Throughput: 2.91 Cycles Throughput Bottleneck: Backend
Loop Count: 35
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 |
-----------------------------------------------------------------------------------------
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | rcl r8d, 0x2
Total Num Of Uops: 3
With additional dependency-breaking instructions
Throughput Analysis Report
--------------------------
Block Throughput: 2.90 Cycles Throughput Bottleneck: Backend
Loop Count: 34
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
--------------------------------------------------------------------------------------------------
| Cycles | 1.0 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 | 1.0 | 1.0 | | | | | 1.0 | | rcl r8d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
Total Num Of Uops: 4
With 13 independent instructions
Throughput Analysis Report
--------------------------
Block Throughput: 9.70 Cycles Throughput Bottleneck: Dependency chains
Loop Count: 23
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: 12.95 Cycles Throughput Bottleneck: Dependency chains
Loop Count: 22
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 | | rcl r8d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl r9d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl r10d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl r11d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl r12d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl r13d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl r14d, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl ebx, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl ecx, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl edx, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl edi, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl esi, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | rcl ebp, 0x2
| 1 | | | | | | 1.0 | | | test r15, r15
Total Num Of Uops: 52