# Form `VX128_P` — VX128_P — VMX128 permute

## Bit Layout

| Bits | Field | Meaning |
| --- | --- | --- |
| 0–5 | `OPCD` | primary opcode (6) |
| 6–10 | `VD128l` | destination low 5 bits |
| 11–15 | `PERMl` | permute selector low 5 bits |
| 16–20 | `VB128l` | source B low 5 bits |
| 21–22 | `—` | reserved |
| 23–25 | `PERMh` | permute selector high 3 bits |
| 28–29 | `VD128h` | destination high 2 bits |
| 30–31 | `VB128h` | source B high 2 bits |

## Instructions Using This Form

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| Mnemonic | Opcode | Group | Description |
| --- | --- | --- | --- |
| [`vpermwi128`](../vmx128/vpermwi128.md) | `0x18000210` | vmx | Vector128 Permutate Word Immediate |

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