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<!---======================= begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ==========================-->
## Opcode
SWITCHJMP = 0x69
## Format
| | | | | | |
| --- | --- | --- | --- | --- | --- |
| 0x69(SWITCHJMP) | Exec_size | Num_labels | Index | Label0 | LabelN | Label(Num_labels-1) |
## Semantics
Jumps to one of the labels based on the index value.
## Description
Implements a multiway branch by performing a jump to one of the labels in the table based on the given index.
- **Exec_size(ub):** Execution size
- Bit[2..0]: size of the region for source and destination operands
- 0b000: 1 element (scalar)
- Bit[7..4]: execution mask (explicit control over the enabled channels)
- 0b0000: M1
- 0b0001: M2
- 0b0010: M3
- 0b0011: M4
- 0b0100: M5
- 0b0101: M6
- 0b0110: M7
- 0b0111: M8
- 0b1000: M1_NM
- 0b1001: M2_NM
- 0b1010: M3_NM
- 0b1011: M4_NM
- 0b1100: M5_NM
- 0b1101: M6_NM
- 0b1110: M7_NM
- 0b1111: M8_NM
- **Num_labels(ub):** Number of labels in the table. Must be in the range [1..32]
- **Index(scalar):** Index of the label in the table to jump to. It must have unsigned integer type, and its value must be in the range of [0..<num_labels>-1]
- **Label0(uw):** The 0th label in the jump table, represented by the label variable's id. It must be a block label
- **LabelN(uw):** The Nth label in the jump table, represented by the label variable's id. It must be a block label
- **Label(Num_labels-1)(unknown):** The last label in the jump table, represented by the label variable's id. It must be a block label
#### Properties
## Text
```
SWITCHJMP (<exec_size>) <index> (Label0, Label1, ..., LabelN-1)
```
## Notes
|
