ADD (M32, I32) - Port Usage (IACA 3.0)


With blocking instructions for port '4':

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 |  0.3     0.0  |  0.3  |  4.0     0.0  |  4.0     1.0  | 11.0  |  0.3  |  0.2  |  4.0  |
--------------------------------------------------------------------------------------------------

| Num Of   |                    Ports pressure in cycles                         |      |
|  Uops    |  0  - DV    |  1   |  2  -  D    |  3  -  D    |  4   |  5   |  6   |  7   |
-----------------------------------------------------------------------------------------
|   2^     |             |      | 1.0         |             | 1.0  |      |      |      | mov qword ptr [r14+0x40], r8
|   2^     |             |      |             | 1.0         | 1.0  |      |      |      | mov qword ptr [r14+0x48], r8
|   2^     |             |      |             |             | 1.0  |      |      | 1.0  | mov qword ptr [r14+0x50], r8
|   2^     |             |      | 1.0         |             | 1.0  |      |      |      | mov qword ptr [r14+0x58], r8
|   2^     |             |      |             | 1.0         | 1.0  |      |      |      | mov qword ptr [r14+0x60], r8
|   2^     |             |      |             |             | 1.0  |      |      | 1.0  | mov qword ptr [r14+0x68], r8
|   2^     |             |      | 1.0         |             | 1.0  |      |      |      | mov qword ptr [r14+0x70], r8
|   2^     |             |      |             | 1.0         | 1.0  |      |      |      | mov qword ptr [r14+0x78], r8
|   2^     |             |      |             |             | 1.0  |      |      | 1.0  | mov qword ptr [r14+0x80], r8
|   2^     |             |      | 1.0         |             | 1.0  |      |      |      | mov qword ptr [r14+0x88], r8
|   4^     | 0.3         | 0.3  |             | 1.0     1.0 | 1.0  | 0.3  | 0.2  | 1.0  | add dword ptr [r14], 0x1000000
Total Num Of Uops: 24
⇨ One μop that can only use port '4'

With blocking instructions for ports {'2', '3'}:

Throughput Analysis Report
--------------------------
Block Throughput: 5.50 Cycles       Throughput Bottleneck: Backend
Loop Count:  23
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
|  Port  |   0   -  DV   |   1   |   2   -  D    |   3   -  D    |   4   |   5   |   6   |   7   |
--------------------------------------------------------------------------------------------------
| Cycles |  0.2     0.0  |  0.2  |  5.5     5.5  |  5.5     5.5  |  1.0  |  0.2  |  0.2  |  1.0  |
--------------------------------------------------------------------------------------------------

| Num Of   |                    Ports pressure in cycles                         |      |
|  Uops    |  0  - DV    |  1   |  2  -  D    |  3  -  D    |  4   |  5   |  6   |  7   |
-----------------------------------------------------------------------------------------
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov bh, byte ptr [rdi+0x40]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov ch, byte ptr [rdi+0x41]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov dh, byte ptr [rdi+0x42]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov ah, byte ptr [rdi+0x43]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov bh, byte ptr [rdi+0x40]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov ch, byte ptr [rdi+0x41]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov dh, byte ptr [rdi+0x42]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov ah, byte ptr [rdi+0x43]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov bh, byte ptr [rdi+0x40]
|   1      |             |      | 0.5     0.5 | 0.5     0.5 |      |      |      |      | mov ch, byte ptr [rdi+0x41]
|   4^     | 0.2         | 0.2  | 0.5     0.5 | 0.5     0.5 | 1.0  | 0.2  | 0.2  | 1.0  | add dword ptr [r14], 0x1000000
Total Num Of Uops: 14
⇨ One μop that can only use ports {'2', '3'}

With blocking instructions for ports {'2', '3', '7'}:

Throughput Analysis Report
--------------------------
Block Throughput: 13.00 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 |  0.3     0.0  |  0.3  |  4.7     0.7  |  4.6     0.6  | 13.0  |  0.3  |  0.2  |  4.7  |
--------------------------------------------------------------------------------------------------

| Num Of   |                    Ports pressure in cycles                         |      |
|  Uops    |  0  - DV    |  1   |  2  -  D    |  3  -  D    |  4   |  5   |  6   |  7   |
-----------------------------------------------------------------------------------------
|   2^     |             |      | 0.3         | 0.3         | 1.0  |      |      | 0.4  | mov qword ptr [r14+0x40], r8
|   2^     |             |      | 0.4         | 0.3         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x48], r8
|   2^     |             |      | 0.3         | 0.4         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x50], r8
|   2^     |             |      | 0.3         | 0.3         | 1.0  |      |      | 0.4  | mov qword ptr [r14+0x58], r8
|   2^     |             |      | 0.4         | 0.3         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x60], r8
|   2^     |             |      | 0.3         | 0.4         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x68], r8
|   2^     |             |      | 0.3         | 0.3         | 1.0  |      |      | 0.4  | mov qword ptr [r14+0x70], r8
|   2^     |             |      | 0.4         | 0.3         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x78], r8
|   2^     |             |      | 0.3         | 0.4         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x80], r8
|   2^     |             |      | 0.3         | 0.3         | 1.0  |      |      | 0.4  | mov qword ptr [r14+0x88], r8
|   2^     |             |      | 0.4         | 0.3         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x90], r8
|   2^     |             |      | 0.3         | 0.4         | 1.0  |      |      | 0.3  | mov qword ptr [r14+0x98], r8
|   4^     | 0.3         | 0.3  | 0.7     0.7 | 0.6     0.6 | 1.0  | 0.3  | 0.2  | 0.7  | add dword ptr [r14], 0x1000000
Total Num Of Uops: 28
⇨ One μop that can only use ports {'2', '3', '7'}

With blocking instructions for ports {'0', '1', '5', '6'}:

Throughput Analysis Report
--------------------------
Block Throughput: 4.53 Cycles       Throughput Bottleneck: FrontEnd
Loop Count:  22
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
|  Port  |   0   -  DV   |   1   |   2   -  D    |   3   -  D    |   4   |   5   |   6   |   7   |
--------------------------------------------------------------------------------------------------
| Cycles |  4.3     0.0  |  4.3  |  0.7     0.7  |  0.6     0.6  |  1.0  |  4.3  |  4.2  |  0.7  |
--------------------------------------------------------------------------------------------------

| Num Of   |                    Ports pressure in cycles                         |      |
|  Uops    |  0  - DV    |  1   |  2  -  D    |  3  -  D    |  4   |  5   |  6   |  7   |
-----------------------------------------------------------------------------------------
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   4^     | 0.3         | 0.3  | 0.7     0.7 | 0.6     0.6 | 1.0  | 0.3  | 0.2  | 0.7  | add dword ptr [r14], 0x1000000
Total Num Of Uops: 20
⇨ One μop that can only use ports {'0', '1', '5', '6'}

With an indexed addressing mode


With blocking instructions for port '4':

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 |  0.3     0.0  |  0.3  |  4.0     1.0  |  4.0     1.0  | 11.0  |  0.3  |  0.2  |  4.0  |
--------------------------------------------------------------------------------------------------

| Num Of   |                    Ports pressure in cycles                         |      |
|  Uops    |  0  - DV    |  1   |  2  -  D    |  3  -  D    |  4   |  5   |  6   |  7   |
-----------------------------------------------------------------------------------------
|   2^     |             |      |             |             | 1.0  |      |      | 1.0  | mov qword ptr [r14+0x40], r8
|   2^     |             |      |             | 1.0         | 1.0  |      |      |      | mov qword ptr [r14+0x48], r8
|   2^     |             |      |             |             | 1.0  |      |      | 1.0  | mov qword ptr [r14+0x50], r8
|   2^     |             |      | 1.0         |             | 1.0  |      |      |      | mov qword ptr [r14+0x58], r8
|   2^     |             |      |             | 1.0         | 1.0  |      |      |      | mov qword ptr [r14+0x60], r8
|   2^     |             |      |             |             | 1.0  |      |      | 1.0  | mov qword ptr [r14+0x68], r8
|   2^     |             |      | 1.0         |             | 1.0  |      |      |      | mov qword ptr [r14+0x70], r8
|   2^     |             |      |             | 1.0         | 1.0  |      |      |      | mov qword ptr [r14+0x78], r8
|   2^     |             |      |             |             | 1.0  |      |      | 1.0  | mov qword ptr [r14+0x80], r8
|   2^     |             |      | 1.0         |             | 1.0  |      |      |      | mov qword ptr [r14+0x88], r8
|   4      | 0.3         | 0.3  | 1.0     1.0 | 1.0     1.0 | 1.0  | 0.3  | 0.2  |      | add dword ptr [r14+r13*1], 0x1000000
Total Num Of Uops: 24
⇨ One μop that can only use port '4'

With blocking instructions for ports {'2', '3'}:

Throughput Analysis Report
--------------------------
Block Throughput: 6.00 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 |  0.3     0.0  |  0.3  |  6.0     6.0  |  6.0     6.0  |  1.0  |  0.3  |  0.2  |  0.0  |
--------------------------------------------------------------------------------------------------

| Num Of   |                    Ports pressure in cycles                         |      |
|  Uops    |  0  - DV    |  1   |  2  -  D    |  3  -  D    |  4   |  5   |  6   |  7   |
-----------------------------------------------------------------------------------------
|   1      |             |      | 1.0     1.0 |             |      |      |      |      | mov bh, byte ptr [rdi+0x40]
|   1      |             |      |             | 1.0     1.0 |      |      |      |      | mov ch, byte ptr [rdi+0x41]
|   1      |             |      | 1.0     1.0 |             |      |      |      |      | mov dh, byte ptr [rdi+0x42]
|   1      |             |      |             | 1.0     1.0 |      |      |      |      | mov ah, byte ptr [rdi+0x43]
|   1      |             |      | 1.0     1.0 |             |      |      |      |      | mov bh, byte ptr [rdi+0x40]
|   1      |             |      |             | 1.0     1.0 |      |      |      |      | mov ch, byte ptr [rdi+0x41]
|   1      |             |      | 1.0     1.0 |             |      |      |      |      | mov dh, byte ptr [rdi+0x42]
|   1      |             |      |             | 1.0     1.0 |      |      |      |      | mov ah, byte ptr [rdi+0x43]
|   1      |             |      | 1.0     1.0 |             |      |      |      |      | mov bh, byte ptr [rdi+0x40]
|   1      |             |      |             | 1.0     1.0 |      |      |      |      | mov ch, byte ptr [rdi+0x41]
|   4      | 0.3         | 0.3  | 1.0     1.0 | 1.0     1.0 | 1.0  | 0.3  | 0.2  |      | add dword ptr [r14+r13*1], 0x1000000
Total Num Of Uops: 14
⇨ 2 μops that can only use ports {'2', '3'}

With blocking instructions for ports {'0', '1', '5', '6'}:

Throughput Analysis Report
--------------------------
Block Throughput: 5.00 Cycles       Throughput Bottleneck: Dependency chains
Loop Count:  22
Port Binding In Cycles Per Iteration:
--------------------------------------------------------------------------------------------------
|  Port  |   0   -  DV   |   1   |   2   -  D    |   3   -  D    |   4   |   5   |   6   |   7   |
--------------------------------------------------------------------------------------------------
| Cycles |  4.3     0.0  |  4.3  |  1.0     1.0  |  1.0     1.0  |  1.0  |  4.3  |  4.2  |  0.0  |
--------------------------------------------------------------------------------------------------

| Num Of   |                    Ports pressure in cycles                         |      |
|  Uops    |  0  - DV    |  1   |  2  -  D    |  3  -  D    |  4   |  5   |  6   |  7   |
-----------------------------------------------------------------------------------------
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.3  | 0.2  |      | mov bh, 0x0
|   1      | 0.2         | 0.3  |             |             |      | 0.3  | 0.3  |      | mov ch, 0x0
|   1      | 0.3         | 0.2  |             |             |      | 0.3  | 0.3  |      | mov dh, 0x0
|   1      | 0.3         | 0.3  |             |             |      | 0.2  | 0.3  |      | mov ah, 0x0
|   4      | 0.3         | 0.3  | 1.0     1.0 | 1.0     1.0 | 1.0  | 0.3  | 0.2  |      | add dword ptr [r14+r13*1], 0x1000000
Total Num Of Uops: 20
⇨ One μop that can only use ports {'0', '1', '5', '6'}