BSR (R64, M64) - Port Usage (IACA 2.1)
With blocking instructions for port '1':
Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles Throughput Bottleneck: Port1
Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 |
-------------------------------------------------------------------------
| Cycles | 0.0 0.0 | 11.0 | 1.0 1.0 | 0.0 0.0 | 0.0 | 0.0 |
-------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | |
---------------------------------------------------------------------
| 1 | | 1.0 | | | | | CP | addpd xmm0, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm2, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm3, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm4, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm5, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm6, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm7, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm8, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm9, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm10, xmm1
| 2^ | | 1.0 | 1.0 1.0 | | | | CP | bsr r8, qword ptr [r14]
Total Num Of Uops: 12
⇨ One μop that can only use port '1'
With blocking instructions for port '2':
Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles Throughput Bottleneck: PORT2_AGU, Port2_DATA
Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 |
-------------------------------------------------------------------------
| Cycles | 0.0 0.0 | 1.0 | 11.0 11.0 | 0.0 0.0 | 0.0 | 0.0 |
-------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | |
---------------------------------------------------------------------
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm0, dword ptr [r14+0x40]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm1, dword ptr [r14+0x44]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm2, dword ptr [r14+0x48]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm3, dword ptr [r14+0x4c]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm4, dword ptr [r14+0x50]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm5, dword ptr [r14+0x54]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm6, dword ptr [r14+0x58]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm7, dword ptr [r14+0x5c]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm8, dword ptr [r14+0x60]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm9, dword ptr [r14+0x64]
| 2^ | | 1.0 | 1.0 1.0 | | | | CP | bsr r8, qword ptr [r14]
Total Num Of Uops: 12
⇨ One μop that can only use port '2'
With an indexed addressing mode
With blocking instructions for port '1':
Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles Throughput Bottleneck: Port1
Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 |
-------------------------------------------------------------------------
| Cycles | 0.0 0.0 | 11.0 | 1.0 1.0 | 0.0 0.0 | 0.0 | 0.0 |
-------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | |
---------------------------------------------------------------------
| 1 | | 1.0 | | | | | CP | addpd xmm0, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm2, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm3, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm4, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm5, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm6, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm7, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm8, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm9, xmm1
| 1 | | 1.0 | | | | | CP | addpd xmm10, xmm1
| 2 | | 1.0 | 1.0 1.0 | | | | CP | bsr r8, qword ptr [r14+r13*1]
Total Num Of Uops: 12
⇨ One μop that can only use port '1'
With blocking instructions for port '2':
Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles Throughput Bottleneck: PORT2_AGU, Port2_DATA
Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 |
-------------------------------------------------------------------------
| Cycles | 0.0 0.0 | 1.0 | 11.0 11.0 | 0.0 0.0 | 0.0 | 0.0 |
-------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | |
---------------------------------------------------------------------
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm0, dword ptr [r14+0x40]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm1, dword ptr [r14+0x44]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm2, dword ptr [r14+0x48]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm3, dword ptr [r14+0x4c]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm4, dword ptr [r14+0x50]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm5, dword ptr [r14+0x54]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm6, dword ptr [r14+0x58]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm7, dword ptr [r14+0x5c]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm8, dword ptr [r14+0x60]
| 1*^ | | | 1.0 1.0 | | | | CP | cvtss2sd xmm9, dword ptr [r14+0x64]
| 2 | | 1.0 | 1.0 1.0 | | | | CP | bsr r8, qword ptr [r14+r13*1]
Total Num Of Uops: 12
⇨ One μop that can only use port '2'