VPADDD (YMM, YMM, M256) - Port Usage (IACA 2.3)


With blocking instructions for ports {'2', '3'}:

Throughput Analysis Report
--------------------------
Block Throughput: 5.50 Cycles       Throughput Bottleneck: Backend. PORT2_AGU, Port2_DATA, PORT3_AGU, Port3_DATA

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 |     |     |     |     | CP | mov r8w, word ptr [r14+0x40]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r9w, word ptr [r14+0x42]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r10w, word ptr [r14+0x44]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r11w, word ptr [r14+0x46]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r12w, word ptr [r14+0x48]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov bx, word ptr [r14+0x4a]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov cx, word ptr [r14+0x4c]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov dx, word ptr [r14+0x4e]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r8w, word ptr [r14+0x40]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r9w, word ptr [r14+0x42]
|   2    | 0.3       | 0.3 | 0.5   0.5 | 0.5   0.5 |     | 0.3 |     |     | CP | 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: 3.70 Cycles       Throughput Bottleneck: FrontEnd

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 3.7    0.0  | 3.7  | 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 |     |     | CP | vmovq xmm2, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm4, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm5, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm6, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm7, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm8, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm9, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm10, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm11, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm12, xmm3
|   2    | 0.3       | 0.3 | 0.5   0.5 | 0.5   0.5 |     | 0.3 |     |     | CP | 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. PORT2_AGU, Port2_DATA, PORT3_AGU, Port3_DATA

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 |     |     |     |     | CP | mov r8w, word ptr [r14+0x40]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r9w, word ptr [r14+0x42]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r10w, word ptr [r14+0x44]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r11w, word ptr [r14+0x46]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r12w, word ptr [r14+0x48]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov bx, word ptr [r14+0x4a]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov cx, word ptr [r14+0x4c]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov dx, word ptr [r14+0x4e]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r8w, word ptr [r14+0x40]
|   1    |           |     | 0.5   0.5 | 0.5   0.5 |     |     |     |     | CP | mov r9w, word ptr [r14+0x42]
|   2    | 0.3       | 0.3 | 0.5   0.5 | 0.5   0.5 |     | 0.3 |     |     | CP | 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: 3.70 Cycles       Throughput Bottleneck: FrontEnd

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 3.7    0.0  | 3.7  | 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 |     |     | CP | vmovq xmm2, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm4, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm5, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm6, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm7, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm8, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm9, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm10, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm11, xmm3
|   1    | 0.3       | 0.3 |           |           |     | 0.3 |     |     | CP | vmovq xmm12, xmm3
|   2    | 0.3       | 0.3 | 0.5   0.5 | 0.5   0.5 |     | 0.3 |     |     | CP | vpaddd ymm0, ymm1, ymmword ptr [r14+r13*1]
Total Num Of Uops: 12
⇨ One μop that can only use ports {'0', '1', '5'}