ROL (R32, I8) - Port Usage (IACA 2.3)


With blocking instructions for port '0':

Throughput Analysis Report
--------------------------
Block Throughput: 10.00 Cycles       Throughput Bottleneck: Backend. Port0

Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |
-------------------------------------------------------------------------
| Cycles | 10.0   0.0  | 0.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 2.0  |
-------------------------------------------------------------------------


| 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    |           |     |           |           |     | 2.0 |    | rol r8d, 0x2
Total Num Of Uops: 12

With blocking instructions for port '5':

Throughput Analysis Report
--------------------------
Block Throughput: 10.00 Cycles       Throughput Bottleneck: Backend. Port5

Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |
-------------------------------------------------------------------------
| Cycles | 2.0    0.0  | 0.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 10.0 |
-------------------------------------------------------------------------


| Num Of |              Ports pressure in cycles               |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |    |
---------------------------------------------------------------------
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm0, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm2, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm3, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm4, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm5, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm6, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm7, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm8, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm9, xmm1
|   1    |           |     |           |           |     | 1.0 | CP | andnpd xmm10, xmm1
|   2    | 2.0       |     |           |           |     |     |    | rol r8d, 0x2
Total Num Of Uops: 12

With blocking instructions for ports {'0', '1'}:

Throughput Analysis Report
--------------------------
Block Throughput: 5.00 Cycles       Throughput Bottleneck: Backend. Port0, Port1

Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |
-------------------------------------------------------------------------
| Cycles | 5.0    0.0  | 5.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 2.0  |
-------------------------------------------------------------------------


| Num Of |              Ports pressure in cycles               |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |    |
---------------------------------------------------------------------
|   1    | 1.0       |     |           |           |     |     | CP | lea r9w, ptr [r14]
|   1    |           | 1.0 |           |           |     |     | CP | lea r10w, ptr [r14]
|   1    | 1.0       |     |           |           |     |     | CP | lea r11w, ptr [r14]
|   1    |           | 1.0 |           |           |     |     | CP | lea r12w, ptr [r14]
|   1    | 1.0       |     |           |           |     |     | CP | lea bx, ptr [r14]
|   1    |           | 1.0 |           |           |     |     | CP | lea cx, ptr [r14]
|   1    | 1.0       |     |           |           |     |     | CP | lea dx, ptr [r14]
|   1    |           | 1.0 |           |           |     |     | CP | lea r9w, ptr [r14]
|   1    | 1.0       |     |           |           |     |     | CP | lea r10w, ptr [r14]
|   1    |           | 1.0 |           |           |     |     | CP | lea r11w, ptr [r14]
|   2    |           |     |           |           |     | 2.0 |    | rol r8d, 0x2
Total Num Of Uops: 12

With blocking instructions for ports {'0', '5'}:

Throughput Analysis Report
--------------------------
Block Throughput: 6.00 Cycles       Throughput Bottleneck: Backend. Port0, Port5

Port Binding In Cycles Per Iteration:
-------------------------------------------------------------------------
|  Port  |  0   -  DV  |  1   |  2   -  D   |  3   -  D   |  4   |  5   |
-------------------------------------------------------------------------
| Cycles | 6.0    0.0  | 0.0  | 0.0    0.0  | 0.0    0.0  | 0.0  | 6.0  |
-------------------------------------------------------------------------


| Num Of |              Ports pressure in cycles               |    |
|  Uops  |  0  - DV  |  1  |  2  -  D  |  3  -  D  |  4  |  5  |    |
---------------------------------------------------------------------
|   1    | 1.0       |     |           |           |     |     | CP | blendpd xmm0, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 | CP | blendpd xmm2, xmm1, 0x2
|   1    | 1.0       |     |           |           |     |     | CP | blendpd xmm3, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 | CP | blendpd xmm4, xmm1, 0x2
|   1    | 1.0       |     |           |           |     |     | CP | blendpd xmm5, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 | CP | blendpd xmm6, xmm1, 0x2
|   1    | 1.0       |     |           |           |     |     | CP | blendpd xmm7, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 | CP | blendpd xmm8, xmm1, 0x2
|   1    | 1.0       |     |           |           |     |     | CP | blendpd xmm9, xmm1, 0x2
|   1    |           |     |           |           |     | 1.0 | CP | blendpd xmm10, xmm1, 0x2
|   2    | 1.0       |     |           |           |     | 1.0 | CP | rol r8d, 0x2
Total Num Of Uops: 12
⇨ 2 μops that can only use ports {'0', '5'}