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# SIMD.%type%.and()

SIMD.js has been taken out of active development in TC39 and removed from Stage 3. It is not being pursued by web browsers for implementation anymore. SIMD operations exposed to the web are under active development within WebAssembly, with operations based on the SIMD.js operations.

The static `SIMD.%type%.and()` method returns a new instance with the logical AND of the lane values (`a & b`). This operation exists only on integer and boolean SIMD types.

## Syntax

```SIMD.Int8x16.and(a, b)
SIMD.Int16x8.and(a, b)
SIMD.Int32x4.and(a, b)

SIMD.Uint8x16.and(a, b)
SIMD.Uint16x8.and(a, b)
SIMD.Uint32x4.and(a, b)

SIMD.Bool8x16.and(a, b)
SIMD.Bool16x8.and(a, b)
SIMD.Bool32x4.and(a, b)
SIMD.Bool64x2.and(a, b)
```

### Parameters

a
An instance of a SIMD type.
`b`
Another instance of a SIMD type.

### Return value

A new corresponding SIMD data type with the logical AND of the lane values (`a & b`).

## Description

The bitwise AND operation only yields 1, if both `a` and `b` are 1. The truth table for the AND operation is:

`a` `b` `a & b`
0 0 0
0 1 0
1 0 0
1 1 1

For example, a bitwise AND of `5 & 1` results in `0001` which is 1 in decimal.

```5  0101
1  0001
----
1  0001
```

## Examples

### Bitwise AND of two `Int32x4`

```var a = SIMD.Int32x4(1, 2, 4, 8);
var b = SIMD.Int32x4(5, 5, 5, 5);
SIMD.Int32x4.and(a, b);
// Int32x4[1, 0, 4, 0]
```

## Specifications

Specification Status Comment
SIMD
The definition of 'SIMDConstructor.and' in that specification.
Obsolete Initial definition.

## Browser compatibility

Experimental SIMD.js has been removed from browsers. It's still available in Firefox Nightly, but will be removed in favor of a SIMD implementation in WebAssembly. See also bug 1416723.