W3cubDocs

SIMD.Bool16x8

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 SIMD.Bool16x8 data type is a 128-bit vector divided into 8 lanes storing boolean values.

Syntax

SIMD.Bool16x8(s0, s1, s2, s3, s4, s5, s6, s7);

Parameters

s[0-7] Optional: A boolean specifying the value of the lane. Defaults to false.

Constructor functions

In addition to the simple creator function, the SIMD API provides the following constructor functions.

SIMD.Bool16x8.splat(): Creates an Bool6x8 with all lanes set to a given value.

Note: SIMD types don't work with new, as SIMD values are no "boxed" objects (comparable to String(s) vs. new String(s), which creates a String object).

var v = new SIMD.Bool16x8(true, true, true, true, false, false, false, false); 
// TypeError: SIMD.Bool16x8 is not a constructor
var w = new SIMD.Bool16x8.splat(true); 
// TypeError: SIMD.Bool16x8.splat is not a constructor

Instead, you just write:

var v = SIMD.Bool16x8(true, true, true, true, false, false, false, false);
var w = SIMD.Bool16x8.splat(true);

Operations

To actually do something with SIMD types, SIMD operations are needed that work on SIMD data types.

Checking SIMD types

SIMD.Bool16x8.check(): Returns a new Bool16x8 if the parameter is a valid Bool16x8 data type. Throws a TypeError otherwise.

Accessing and mutating lanes

SIMD.Bool16x8.extractLane(): Returns the value of the given lane.
SIMD.Bool16x8.replaceLane(): Returns a new Bool16x8 with the given lane value replaced.

Boolean operations
SIMD.Bool16x8.allTrue(): Checks if all lanes hold a true value.
SIMD.Bool16x8.anyTrue(): Checks if any of the lanes hold a true value.

Bitwise logical operations

SIMD.Bool16x8.and(): Returns a new Bool16x8 with the logical AND of the lane values (a & b).
SIMD.Bool16x8.or(): Returns a new Bool16x8 with the logical OR of the lane values (a | b).
SIMD.Bool16x8.xor(): Returns a new Bool16x8 with the logical XOR of the lane values (a ^ b).
SIMD.Bool16x8.not(): Returns a new Bool16x8 with lane with the logical NOT of the lane values (~a).

SIMD prototype

The following methods and properties are installed on the SIMD.Bool16x8.prototype.

SIMD.Bool16x8.prototype.constructor: Specifies the function that creates a SIMD object's prototype.
SIMD.Bool16x8.prototype.toLocaleString(): Returns a localized string representing the SIMD type and its elements. Overrides the Object.prototype.toLocaleString() method.
SIMD.Bool16x8.prototype.toString(): Returns a string representing the SIMD type and its elements. Overrides the Object.prototype.toString() method.
SIMD.Bool16x8.prototype.valueOf(): Returns the primitive value of a SIMD object.
SIMD.Bool16x8.prototype.toSource(): Returns a string representing the source code of the object. Overrides the Object.prototype.toSource() method.

Examples

Constructing a Bool16x8

SIMD.Bool16x8(true, true, true, true, false, false, false, false); 
// Bool16x8[true, true, true, true, false, false, false, false]

SIMD.Bool16x8(true, false);
// Bool16x8[true, false, false, false, false, false, false, false]

SIMD.Bool16x8();
// Bool16x8[false, false, false false, false, false, false, false]

Specifications

Specification	Status	Comment
SIMD The definition of 'Bool16x8' in that specification.	Obsolete	Initial definition.

Browser compatibility

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	No support	Nightly build	Nightly build	No support	No support	No support

Feature	Android	Chrome for Android	Edge	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	No support	No support	Nightly build	Nightly build	No support	No support	No support