MUL (R32) - Port Usage (IACA 3.0)


With blocking instructions for port '1':

Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles       Throughput Bottleneck: Backend
Loop Count:  22
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  |             |             |      |      |      |      | imul r9w, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul r11w, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul r12w, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul bx, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul cx, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul r9w, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul r11w, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul r12w, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul bx, r10w, 0x0
|   1      |             | 1.0  |             |             |      |      |      |      | imul cx, r10w, 0x0
|   2      |             | 1.0  |             |             |      | 1.0  |      |      | 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: 10.95 Cycles       Throughput Bottleneck: Backend
Loop Count:  22
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  |      |      | insertps xmm0, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm2, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm3, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm4, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm5, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm6, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm7, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm8, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm9, xmm1, 0x2
|   1      |             |      |             |             |      | 1.0  |      |      | insertps xmm10, xmm1, 0x2
|   2      |             | 1.0  |             |             |      | 1.0  |      |      | mul r8d
Total Num Of Uops: 12
⇨ One μop that can only use port '5'