# Form `VX128_3` — VX128_3 — VMX128 unary with immediate

## Bit Layout

| Bits | Field | Meaning |
| --- | --- | --- |
| 0–5 | `OPCD` | primary opcode (6) |
| 6–10 | `VD128l` | destination low 5 bits |
| 11–15 | `IMM` | 5-bit immediate |
| 16–20 | `VB128l` | source B low 5 bits |
| 21–27 | `XO` | extended opcode |
| 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 |
| --- | --- | --- | --- |
| [`vcfpsxws128`](../vmx128/vcfpsxws128.md) | `0x18000230` | vmx | Vector128 Convert From Floating-Point to Signed Fixed-Point Word Saturate |
| [`vcfpuxws128`](../vmx128/vcfpuxws128.md) | `0x18000270` | vmx | Vector128 Convert From Floating-Point to Unsigned Fixed-Point Word Saturate |
| [`vcsxwfp128`](../vmx128/vcsxwfp128.md) | `0x180002b0` | vmx | Vector128 Convert From Signed Fixed-Point Word to Floating-Point |
| [`vcuxwfp128`](../vmx128/vcuxwfp128.md) | `0x180002f0` | vmx | Vector128 Convert From Unsigned Fixed-Point Word to Floating-Point |
| [`vrfim128`](../vmx128/vrfim.md) | `0x18000330` | vmx | Vector128 Round to Floating-Point Integer toward -Infinity |
| [`vrfin128`](../vmx128/vrfin.md) | `0x18000370` | vmx | Vector128 Round to Floating-Point Integer Nearest |
| [`vrfip128`](../vmx128/vrfip.md) | `0x180003b0` | vmx | Vector128 Round to Floating-Point Integer toward +Infinity |
| [`vrfiz128`](../vmx128/vrfiz.md) | `0x180003f0` | vmx | Vector128 Round to Floating-Point Integer toward Zero |
| [`vrefp128`](../vmx128/vrefp.md) | `0x18000630` | vmx | Vector128 Reciprocal Estimate Floating Point |
| [`vrsqrtefp128`](../vmx128/vrsqrtefp.md) | `0x18000670` | vmx | Vector128 Reciprocal Square Root Estimate Floating Point |
| [`vexptefp128`](../vmx128/vexptefp.md) | `0x180006b0` | vmx | Vector128 Log2 Estimate Floating Point |
| [`vlogefp128`](../vmx128/vlogefp.md) | `0x180006f0` | vmx | Vector128 Log2 Estimate Floating Point |
| [`vspltw128`](../vmx128/vspltw.md) | `0x18000730` | vmx | Vector128 Splat Word |
| [`vspltisw128`](../vmx128/vspltisw.md) | `0x18000770` | vmx | Vector128 Splat Immediate Signed Word |
| [`vupkd3d128`](../vmx128/vupkd3d128.md) | `0x180007f0` | vmx | Vector128 Unpack D3Dtype |

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