RCR (R32, I8) - Throughput and Uops (IACA 2.2)
With 1 independent instruction
Throughput Analysis Report
--------------------------
Block Throughput: 3.00 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 | 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 | | CP | rcr r8d, 0x2
Total Num Of Uops: 3
With additional dependency-breaking instructions
Throughput Analysis Report
--------------------------
Block Throughput: 3.00 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 | 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 | rcr 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: 39.00 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 | | CP | rcr r8d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr r9d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr r10d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr r11d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr r12d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr r13d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr r14d, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr ebx, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr ecx, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr edx, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr edi, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr esi, 0x2
| 3 | 0.8 | 0.8 | | | | 0.8 | 0.8 | | CP | rcr ebp, 0x2
Total Num Of Uops: 39
With additional dependency-breaking instructions
Throughput Analysis Report
--------------------------
Block Throughput: 13.00 Cycles Throughput Bottleneck: FrontEnd, Port0, Port1, Port5, Port6
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 | rcr r8d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr r9d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr r10d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr r11d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr r12d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr r13d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr r14d, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr ebx, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr ecx, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr edx, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr edi, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr esi, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
| 3 | 1.0 | 1.0 | | | | | 1.0 | | CP | rcr ebp, 0x2
| 1 | | | | | | 1.0 | | | CP | test r15, r15
Total Num Of Uops: 52
With the -no_interiteration flag
Throughput Analysis Report
--------------------------
Block Throughput: 0.75 Cycles Throughput Bottleneck: FrontEnd, Port0, Port1, Port5, Port6
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 | | CP | rcr r8d, 0x2
Total Num Of Uops: 3