VPADDD (YMM, YMM, M256) - Port Usage (IACA 3.0)
With blocking instructions for ports {'2', '3'}:
Throughput Analysis Report
--------------------------
Block Throughput: 5.50 Cycles Throughput Bottleneck: Backend
Loop Count: 55
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
--------------------------------------------------------------------------------------------------
| Cycles | 0.3 0.0 | 0.3 | 5.5 5.5 | 5.5 5.5 | 0.0 | 0.3 | 0.0 | 0.0 |
--------------------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
-----------------------------------------------------------------------------------------
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov bh, byte ptr [rdi+0x40]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ch, byte ptr [rdi+0x41]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov dh, byte ptr [rdi+0x42]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ah, byte ptr [rdi+0x43]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov bh, byte ptr [rdi+0x40]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ch, byte ptr [rdi+0x41]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov dh, byte ptr [rdi+0x42]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ah, byte ptr [rdi+0x43]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov bh, byte ptr [rdi+0x40]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ch, byte ptr [rdi+0x41]
| 2^ | 0.3 | 0.3 | 0.5 0.5 | 0.5 0.5 | | 0.3 | | | vpaddd ymm0, ymm1, ymmword ptr [r14]
Total Num Of Uops: 12
⇨ One μop that can only use ports {'2', '3'}
With blocking instructions for ports {'0', '1', '5'}:
Throughput Analysis Report
--------------------------
Block Throughput: 3.30 Cycles Throughput Bottleneck: Backend
Loop Count: 23
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
--------------------------------------------------------------------------------------------------
| Cycles | 3.6 0.0 | 3.6 | 0.5 0.5 | 0.5 0.5 | 0.0 | 3.7 | 0.0 | 0.0 |
--------------------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
-----------------------------------------------------------------------------------------
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm2, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm4, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm5, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm6, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm7, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm8, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm9, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm10, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm11, xmm3
| 1 | 0.3 | 0.3 | | | | 0.3 | | | vmovq xmm12, xmm3
| 2^ | 0.3 | 0.3 | 0.5 0.5 | 0.5 0.5 | | 0.3 | | | vpaddd ymm0, ymm1, ymmword ptr [r14]
Total Num Of Uops: 12
⇨ One μop that can only use ports {'0', '1', '5'}
With an indexed addressing mode
With blocking instructions for ports {'2', '3'}:
Throughput Analysis Report
--------------------------
Block Throughput: 5.50 Cycles Throughput Bottleneck: Backend
Loop Count: 55
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
--------------------------------------------------------------------------------------------------
| Cycles | 0.3 0.0 | 0.3 | 5.5 5.5 | 5.5 5.5 | 0.0 | 0.3 | 0.0 | 0.0 |
--------------------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
-----------------------------------------------------------------------------------------
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov bh, byte ptr [rdi+0x40]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ch, byte ptr [rdi+0x41]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov dh, byte ptr [rdi+0x42]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ah, byte ptr [rdi+0x43]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov bh, byte ptr [rdi+0x40]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ch, byte ptr [rdi+0x41]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov dh, byte ptr [rdi+0x42]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ah, byte ptr [rdi+0x43]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov bh, byte ptr [rdi+0x40]
| 1 | | | 0.5 0.5 | 0.5 0.5 | | | | | mov ch, byte ptr [rdi+0x41]
| 2 | 0.3 | 0.3 | 0.5 0.5 | 0.5 0.5 | | 0.3 | | | vpaddd ymm0, ymm1, ymmword ptr [r14+r13*1]
Total Num Of Uops: 12
⇨ One μop that can only use ports {'2', '3'}
With blocking instructions for ports {'0', '1', '5'}:
Throughput Analysis Report
--------------------------
Block Throughput: 3.32 Cycles Throughput Bottleneck: FrontEnd
Loop Count: 22
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
| Port | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
--------------------------------------------------------------------------------------------------
| Cycles | 3.7 0.0 | 3.6 | 0.5 0.5 | 0.5 0.5 | 0.0 | 3.7 | 0.0 | 0.0 |
--------------------------------------------------------------------------------------------------
| Num Of | Ports pressure in cycles | |
| Uops | 0 - DV | 1 | 2 - D | 3 - D | 4 | 5 | 6 | 7 |
-----------------------------------------------------------------------------------------
| 1 | 0.3 | 0.3 | | | | 0.4 | | | vmovq xmm2, xmm3
| 1 | 0.4 | 0.3 | | | | 0.3 | | | vmovq xmm4, xmm3
| 1 | 0.3 | 0.4 | | | | 0.3 | | | vmovq xmm5, xmm3
| 1 | 0.3 | 0.3 | | | | 0.4 | | | vmovq xmm6, xmm3
| 1 | 0.4 | 0.3 | | | | 0.3 | | | vmovq xmm7, xmm3
| 1 | 0.3 | 0.4 | | | | 0.3 | | | vmovq xmm8, xmm3
| 1 | 0.3 | 0.3 | | | | 0.4 | | | vmovq xmm9, xmm3
| 1 | 0.4 | 0.3 | | | | 0.3 | | | vmovq xmm10, xmm3
| 1 | 0.3 | 0.4 | | | | 0.3 | | | vmovq xmm11, xmm3
| 1 | 0.3 | 0.3 | | | | 0.4 | | | vmovq xmm12, xmm3
| 2 | 0.4 | 0.3 | 0.5 0.5 | 0.5 0.5 | | 0.3 | | | vpaddd ymm0, ymm1, ymmword ptr [r14+r13*1]
Total Num Of Uops: 12
⇨ One μop that can only use ports {'0', '1', '5'}