MUL (R32) - Port Usage (IACA 2.2)


With blocking instructions for port '1':

Throughput Analysis Report
--------------------------
Block Throughput: 11.00 Cycles       Throughput Bottleneck: 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  | 0.0  | 1.0  | 0.0  |
---------------------------------------------------------------------------------------


| Num Of |                    Ports pressure in cycles                     |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    |           | 1.0 |           |           |     |     |     |     | CP | 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'

With blocking instructions for ports {'0', '6'}:

Throughput Analysis Report
--------------------------
Block Throughput: 8.50 Cycles       Throughput Bottleneck: Port0, Port6

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 8.5    0.0  | 1.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 0.0  | 8.5  | 0.0  |
---------------------------------------------------------------------------------------


| Num Of |                    Ports pressure in cycles                     |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    | 1.0       |     |           |           |     |     |     |     | CP | sar r9w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r10w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r11w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r12w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar bx, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar cx, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r9w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r10w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r11w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r12w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar bx, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar cx, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r9w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r10w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r11w, 0x0
|   1    | 0.5       |     |           |           |     |     | 0.5 |     | CP | sar r12w, 0x0
|   2    |           | 1.0 |           |           |     |     | 1.0 |     | CP | mul r8d
Total Num Of Uops: 18
⇨ One μop that can only use ports {'0', '6'}