---
title: "位运算"
description: "位运算与取余"
---
---
title: 位运算
description: 位运算与取余
---
`sa` · 扩展 `bitwise` · 需对应 CLEO 扩展
写法见 [Lua](/docs/cleo/syntax) / [Redux](/docs/cleo/syntax-redux)。
## 与
按位与。
```text
0B10 BIT_AND
in: a, b
out: result
```
```lua
local r = bitAnd(a, b)
```
```js
const result = native("BIT_AND", a, b)
```
## 或
按位或。
```text
0B11 BIT_OR
in: a, b
out: result
```
```lua
local r = bitOr(a, b)
```
```js
const result = native("BIT_OR", a, b)
```
## 异或
按位异或。
```text
0B12 BIT_XOR
in: a, b
out: result
```
```lua
local r = bitXor(a, b)
```
```js
const result = native("BIT_XOR", a, b)
```
## 取反
按位取反（有符号）。
```text
0B13 BIT_NOT
in: a
out: result
```
```lua
local r = bitNot(a)
```
```js
const result = native("BIT_NOT", a)
```
## 取余
整数取余。
```text
0B14 MOD
in: a, b
out: result
```
```lua
local r = mod(a, b)
```
```js
const result = native("MOD", a, b)
```
## 右移
右移 `n` 位。
```text
0B15 BIT_SHR
in: value, n
out: result
```
```lua
local r = bitShr(value, n)
```
```js
const result = native("BIT_SHR", value, n)
```
## 左移
左移 `n` 位。
```text
0B16 BIT_SHL
in: value, n
out: result
```
```lua
local r = bitShl(value, n)
```
```js
const result = native("BIT_SHL", value, n)
```
## 原地与
原地 `&=`。
```text
0B17 BIT_AND_COMPOUND
in: value, n
```
```lua
bitAndCompound(value, n)
```
```js
native("BIT_AND_COMPOUND", value, n)
```
## 原地或
原地 `|=`。
```text
0B18 BIT_OR_COMPOUND
in: value, n
```
```lua
bitOrCompound(value, n)
```
```js
native("BIT_OR_COMPOUND", value, n)
```
## 原地异或
原地 `^=`。
```text
0B19 BIT_XOR_COMPOUND
in: value, n
```
```lua
bitXorCompound(value, n)
```
```js
native("BIT_XOR_COMPOUND", value, n)
```
## 原地取反
原地取反写回。
```text
0B1A BIT_NOT_COMPOUND
in: value
```
```lua
bitNotCompound(value)
```
```js
native("BIT_NOT_COMPOUND", value)
```
## 原地取余
原地 `%=`。
```text
0B1B MOD_COMPOUND
in: value, number
```
```lua
modCompound(value, number)
```
```js
native("MOD_COMPOUND", value, number)
```
## 原地右移
```text
0B1C BIT_SHR_COMPOUND
in: value, n
```
```lua
bitShrCompound(value, n)
```
```js
native("BIT_SHR_COMPOUND", value, n)
```
## 原地左移
```text
0B1D BIT_SHL_COMPOUND
in: value, n
```
```lua
bitShlCompound(value, n)
```
```js
native("BIT_SHL_COMPOUND", value, n)
```
## 符号扩展
把 1 / 2 / 3 字节有符号数扩成 32 位。
```text
0B1E SIGN_EXTEND
in: value, fromSize
```
```lua
signExtend(value, fromSize)
```
```js
Math.signExtend(value, fromSize)
```