# Form `D` — D — Displacement (load/store and immediate ALU)

## Bit Layout

| Bits | Field | Meaning |
| --- | --- | --- |
| 0–5 | `OPCD` | primary opcode |
| 6–10 | `RT` | destination GPR (or RS when storing) |
| 11–15 | `RA` | source GPR (0 ⇒ literal 0 for RA0 forms) |
| 16–31 | `D/SI/UI` | 16-bit signed or unsigned immediate |

## Instructions Using This Form

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| Mnemonic | Opcode | Group | Description |
| --- | --- | --- | --- |
| [`tdi`](../branch/tdi.md) | `0x08000000` | branch | Trap Doubleword Immediate |
| [`twi`](../branch/twi.md) | `0x0c000000` | branch | Trap Word Immediate |
| [`mulli`](../alu/mulli.md) | `0x1c000000` | integer | Multiply Low Immediate |
| [`subficx`](../alu/subficx.md) | `0x20000000` | integer | Subtract From Immediate Carrying |
| [`cmpli`](../alu/cmpli.md) | `0x28000000` | integer | Compare Logical Immediate |
| [`cmpi`](../alu/cmpi.md) | `0x2c000000` | integer | Compare Immediate |
| [`addic`](../alu/addic.md) | `0x30000000` | integer | Add Immediate Carrying |
| [`addic.`](../alu/addicx.md) | `0x34000000` | integer | Add Immediate Carrying and Record |
| [`addi`](../alu/addi.md) | `0x38000000` | integer | Add Immediate |
| [`addis`](../alu/addis.md) | `0x3c000000` | integer | Add Immediate Shifted |
| [`ori`](../alu/ori.md) | `0x60000000` | integer | OR Immediate |
| [`oris`](../alu/oris.md) | `0x64000000` | integer | OR Immediate Shifted |
| [`xori`](../alu/xori.md) | `0x68000000` | integer | XOR Immediate |
| [`xoris`](../alu/xoris.md) | `0x6c000000` | integer | XOR Immediate Shifted |
| [`andi.`](../alu/andix.md) | `0x70000000` | integer | AND Immediate |
| [`andis.`](../alu/andisx.md) | `0x74000000` | integer | AND Immediate Shifted |
| [`lwz`](../memory/lwz.md) | `0x80000000` | memory | Load Word and Zero |
| [`lwzu`](../memory/lwz.md) | `0x84000000` | memory | Load Word and Zero with Update |
| [`lbz`](../memory/lbz.md) | `0x88000000` | memory | Load Byte and Zero |
| [`lbzu`](../memory/lbz.md) | `0x8c000000` | memory | Load Byte and Zero with Update |
| [`stw`](../memory/stw.md) | `0x90000000` | memory | Store Word |
| [`stwu`](../memory/stw.md) | `0x94000000` | memory | Store Word with Update |
| [`stb`](../memory/stb.md) | `0x98000000` | memory | Store Byte |
| [`stbu`](../memory/stb.md) | `0x9c000000` | memory | Store Byte with Update |
| [`lhz`](../memory/lhz.md) | `0xa0000000` | memory | Load Half Word and Zero |
| [`lhzu`](../memory/lhz.md) | `0xa4000000` | memory | Load Half Word and Zero with Update |
| [`lha`](../memory/lha.md) | `0xa8000000` | memory | Load Half Word Algebraic |
| [`lhau`](../memory/lha.md) | `0xac000000` | memory | Load Half Word Algebraic with Update |
| [`sth`](../memory/sth.md) | `0xb0000000` | memory | Store Half Word |
| [`sthu`](../memory/sth.md) | `0xb4000000` | memory | Store Half Word with Update |
| [`lmw`](../memory/lmw.md) | `0xb8000000` | memory | Load Multiple Word |
| [`stmw`](../memory/stmw.md) | `0xbc000000` | memory | Store Multiple Word |
| [`lfs`](../memory/lfs.md) | `0xc0000000` | memory | Load Floating-Point Single |
| [`lfsu`](../memory/lfs.md) | `0xc4000000` | memory | Load Floating-Point Single with Update |
| [`lfd`](../memory/lfd.md) | `0xc8000000` | memory | Load Floating-Point Double |
| [`lfdu`](../memory/lfd.md) | `0xcc000000` | memory | Load Floating-Point Double with Update |
| [`stfs`](../memory/stfs.md) | `0xd0000000` | memory | Store Floating-Point Single |
| [`stfsu`](../memory/stfs.md) | `0xd4000000` | memory | Store Floating-Point Single with Update |
| [`stfd`](../memory/stfd.md) | `0xd8000000` | memory | Store Floating-Point Double |
| [`stfdu`](../memory/stfd.md) | `0xdc000000` | memory | Store Floating-Point Double with Update |

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