MUL (R32) - Port Usage (IACA 2.3)


With blocking instructions for port '0':

Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles       Throughput Bottleneck: Backend. Port0

Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |
-------------------------------------------------------------------------
| Cycles | 11.0   0.0  | 1.0  | 0.0    0.0  | 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 | cvtss2sd xmm0, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm2, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm3, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm4, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm5, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm6, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm7, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm8, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm9, xmm1
|   1    | 1.0       |     |           |           |     |     | CP | cvtss2sd xmm10, xmm1
|   2    | 1.0       | 1.0 |           |           |     |     | CP | mul r8d
Total Num Of Uops: 12
⇨ One μop that can only use port '0'

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   |
-------------------------------------------------------------------------
| Cycles | 1.0    0.0  | 11.0 | 0.0    0.0  | 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 |           |           |     |     | CP | mul r8d
Total Num Of Uops: 12
⇨ One μop that can only use port '1'