## SXM module specification & instruction definition

* RX, TX : Receive/send the particular stream from/to C2C
* SEL : Shift superlane data and select from the north-shifted/south shifted/unshifted data
* TSP : Transpose fp16 data
* PER :

### RX
1. ICU * 1

| 31 .. 13 | 12 | 11 .. 7 | 6 .. 3 | 2 .. 0 |
|----------|--------|---------|--------|---------|
| 0 ... 0 | pathsel| str | dskew | dfunc |

* str : str to be replaced by the input str from C2C
* pathsel : 0--bypass; 1--replace stream
2. IO spec

| RX | ICU | Data | Data |
| ------ | ------------------ | --------------- | ---------------- |
| Input | icu\_rx\_i \[31:0] | SR\_i \[4095:0] | rx\_str \[127:0] |
| Output | icu\_rx\_o \[31:0] | SR\_o \[4095:0] | |

3. Diagram

### TX
1. ICU * 1

| 31 .. 13 | 12 | 11 .. 7 | 6 .. 3 | 2 .. 0 |
|----------|--------|---------|--------|---------|
| 0 ... 0 | pathsel| str | dskew | dfunc |

* str : str to be send to C2C
* pathsel : 0--bypass; 1--select and output stream
2. IO spec

| TX | ICU | Data | Data |
| ------ | ------------------ | --------------- | ---------------- |
| Input | icu\_rx\_i \[31:0] | SR\_i \[4095:0] | |
| Output | icu\_rx\_o \[31:0] | SR\_o \[4095:0] | tx\_str \[127:0] |

3. Diagram

### SEL
1. ICU * 1

| 31 .. 14 | 13 .. 12 | ... | 15 .. 14 | 13 .. 12 | 11 .. 8 | 7 | 6 .. 3 | 2 .. 0 |
|----------|----------|-----|----------|----------|---------|-------|-------|-------|
| 0 | splane_6 | ... | splane_2 | splane_1 | N |dstfunc| dskew | dfunc |

* N : shift amount
* splane1~6: select the shifted direction
* dstfunc : 0--R41; 1--R5
2. IO spec

| SEL | ICU | Data |
|--------|---------------------|----------------------|
| Input | icu_rx_i [31:0] | SR_i [24575:0] | |
| Output | icu_rx_o [31:0] | SR_o [24575:0]

3. Diagram

### TSP
1. ICU * 1

| 31 .. 12 | 11 | 10 .. 8 | 7 | 6 .. 3 | 2 .. 0 |
|----------|----------|-----------|---------|--------|--------|
| 0 ... 0 | is_trp | lastsplane| dstfunc | dskew | dfunc |

* lastsplane : transition from MaxL to minL
* dstfunc : 0--PRM; 1--R5
* is_tsp : whether the input data should perform the TSP

2. IO spec

| TSP | ICU | Data |
|--------|---------------------|----------------------|
| Input | icu_rx_i [31:0] | SR_i [4095:0] | |
| Output | icu_rx_o [31:0] | SR_o [4095:0]
3. Diagram


Note: The first cycle can not achieve II = 1

|--|