# Form `XFL` — XFL — Floating Fields (mtfsf)

## Bit Layout

| Bits | Field | Meaning |
| --- | --- | --- |
| 0–5 | `OPCD` | primary opcode (63) |
| 6 | `L` | field-select behaviour |
| 7–14 | `FM` | FPSCR field mask |
| 15 | `W` | immediate-value flag |
| 16–20 | `FRB` | source FPR |
| 21–30 | `XO` | extended opcode |
| 31 | `Rc` | record-form flag (updates CR1) |

## Instructions Using This Form

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| Mnemonic | Opcode | Group | Description |
| --- | --- | --- | --- |
| [`mtfsfx`](../control/mtfsfx.md) | `0xfc00058e` | control | Move to FPSCR Fields |

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