MULSS (XMM, XMM) - Throughput and Uops (IACA 2.3)


With different registers for different operands

With 1 independent instruction

Throughput Analysis Report
--------------------------
Block Throughput: 2.86 Cycles       Throughput Bottleneck: FrontEnd

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 0.5    0.0  | 0.5  | 0.0    0.0  | 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  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm0, xmm1
Total Num Of Uops: 1

With 12 independent instructions


Throughput Analysis Report
--------------------------
Block Throughput: 6.00 Cycles       Throughput Bottleneck: Backend. Port0, Port1

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 6.0    0.0  | 6.0  | 0.0    0.0  | 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  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    | 1.0       |     |           |           |     |     |     |     | CP | mulss xmm0, xmm1
|   1    |           | 1.0 |           |           |     |     |     |     | CP | mulss xmm2, xmm1
|   1    | 1.0       |     |           |           |     |     |     |     | CP | mulss xmm3, xmm1
|   1    |           | 1.0 |           |           |     |     |     |     | CP | mulss xmm4, xmm1
|   1    | 1.0       |     |           |           |     |     |     |     | CP | mulss xmm5, xmm1
|   1    |           | 1.0 |           |           |     |     |     |     | CP | mulss xmm6, xmm1
|   1    | 1.0       |     |           |           |     |     |     |     | CP | mulss xmm7, xmm1
|   1    |           | 1.0 |           |           |     |     |     |     | CP | mulss xmm8, xmm1
|   1    | 1.0       |     |           |           |     |     |     |     | CP | mulss xmm9, xmm1
|   1    |           | 1.0 |           |           |     |     |     |     | CP | mulss xmm10, xmm1
|   1    | 1.0       |     |           |           |     |     |     |     | CP | mulss xmm11, xmm1
|   1    |           | 1.0 |           |           |     |     |     |     | CP | mulss xmm12, xmm1
Total Num Of Uops: 12

With the same register for for different operands

With 1 independent instruction

Throughput Analysis Report
--------------------------
Block Throughput: 2.86 Cycles       Throughput Bottleneck: FrontEnd

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 0.5    0.0  | 0.5  | 0.0    0.0  | 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  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm0, xmm0
Total Num Of Uops: 1

With 13 independent instructions


Throughput Analysis Report
--------------------------
Block Throughput: 6.50 Cycles       Throughput Bottleneck: Backend. Port0, Port1

Port Binding In Cycles Per Iteration:
---------------------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |  6   |  7   |
---------------------------------------------------------------------------------------
| Cycles | 6.5    0.0  | 6.5  | 0.0    0.0  | 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  |  6  |  7  |    |
---------------------------------------------------------------------------------
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm0, xmm0
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm1, xmm1
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm2, xmm2
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm3, xmm3
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm4, xmm4
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm5, xmm5
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm6, xmm6
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm7, xmm7
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm8, xmm8
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm9, xmm9
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm10, xmm10
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm11, xmm11
|   1    | 0.5       | 0.5 |           |           |     |     |     |     | CP | mulss xmm12, xmm12
Total Num Of Uops: 13