MUL (R32) - Port Usage (IACA 2.3)


With blocking instructions for port '1':

Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles       Throughput Bottleneck: Backend. Port1

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 0.0    0.0  | 11.0 | 0.0    0.0  | 0.0    0.0  | 0.0  | 1.0  | 0.0  | 0.0  |
---------------------------------------------------------------------------------------


| Num Of |                    Ports pressure in cycles                     |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul r9w, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul r11w, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul r12w, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul bx, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul cx, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul r9w, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul r11w, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul r12w, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul bx, r10w
|   1    |           | 1.0 |           |           |     |     |     |     | CP | imul cx, r10w
|   2    |           | 1.0 |           |           |     | 1.0 |     |     | CP | mul r8d
Total Num Of Uops: 12
⇨ One μop that can only use port '1'

With blocking instructions for port '5':

Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles       Throughput Bottleneck: Backend. Port5

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 0.0    0.0  | 1.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 11.0 | 0.0  | 0.0  |
---------------------------------------------------------------------------------------


| Num Of |                    Ports pressure in cycles                     |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm0, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm2, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm3, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm4, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm5, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm6, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm7, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm8, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm9, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 |     |     | CP | insertps xmm10, xmm1, 0x2
|   2    |           | 1.0 |           |           |     | 1.0 |     |     | CP | mul r8d
Total Num Of Uops: 12
⇨ One μop that can only use port '5'