# Form `XO` — XO — Extended, Overflow (ALU with OE/Rc)

## Bit Layout

| Bits | Field | Meaning |
| --- | --- | --- |
| 0–5 | `OPCD` | primary opcode (31) |
| 6–10 | `RT` | destination GPR |
| 11–15 | `RA` | source A |
| 16–20 | `RB` | source B |
| 21 | `OE` | overflow-enable flag |
| 22–30 | `XO` | extended opcode (9 bits) |
| 31 | `Rc` | record-form flag |

## Instructions Using This Form

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| Mnemonic | Opcode | Group | Description |
| --- | --- | --- | --- |
| [`subfcx`](../alu/subfcx.md) | `0x7c000010` | integer | Subtract From Carrying |
| [`mulhdux`](../alu/mulhdux.md) | `0x7c000012` | integer | Multiply High Doubleword Unsigned |
| [`addcx`](../alu/addcx.md) | `0x7c000014` | integer | Add Carrying |
| [`mulhwux`](../alu/mulhwux.md) | `0x7c000016` | integer | Multiply High Word Unsigned |
| [`subfx`](../alu/subfx.md) | `0x7c000050` | integer | Subtract From |
| [`mulhdx`](../alu/mulhdx.md) | `0x7c000092` | integer | Multiply High Doubleword |
| [`mulhwx`](../alu/mulhwx.md) | `0x7c000096` | integer | Multiply High Word |
| [`negx`](../alu/negx.md) | `0x7c0000d0` | integer | Negate |
| [`subfex`](../alu/subfex.md) | `0x7c000110` | integer | Subtract From Extended |
| [`addex`](../alu/addex.md) | `0x7c000114` | integer | Add Extended |
| [`subfzex`](../alu/subfzex.md) | `0x7c000190` | integer | Subtract From Zero Extended |
| [`addzex`](../alu/addzex.md) | `0x7c000194` | integer | Add to Zero Extended |
| [`subfmex`](../alu/subfmex.md) | `0x7c0001d0` | integer | Subtract From Minus One Extended |
| [`mulldx`](../alu/mulldx.md) | `0x7c0001d2` | integer | Multiply Low Doubleword |
| [`addmex`](../alu/addmex.md) | `0x7c0001d4` | integer | Add to Minus One Extended |
| [`mullwx`](../alu/mullwx.md) | `0x7c0001d6` | integer | Multiply Low Word |
| [`addx`](../alu/addx.md) | `0x7c000214` | integer | Add |
| [`divdux`](../alu/divdux.md) | `0x7c000392` | integer | Divide Doubleword Unsigned |
| [`divwux`](../alu/divwux.md) | `0x7c000396` | integer | Divide Word Unsigned |
| [`divdx`](../alu/divdx.md) | `0x7c0003d2` | integer | Divide Doubleword |
| [`divwx`](../alu/divwx.md) | `0x7c0003d6` | integer | Divide Word |

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