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%.sub() method returns a new instance with the lane values subtracted (a - b).


SIMD.Float32x4.sub(a, b)
SIMD.Float64x2.sub(a, b)

SIMD.Int8x16.sub(a, b)
SIMD.Int16x8.sub(a, b)
SIMD.Int32x4.sub(a, b)

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


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

Return value

A new corresponding SIMD data type with the lane values of a and b subtracted (a - b).


var a = SIMD.Float32x4(-1, -2, 3, 4);
var b = SIMD.Float32x4(3, 3, 3, 3);
SIMD.Float32x4.sub(a, b);
// Float32x4[-4, -5, 0, 1]

var c = SIMD.Int16x8(1, 1, 1, 1, 1, 1, 1, 1);
var d = SIMD.Int16x8(3, 3, 3, 3, 3, 3, 3, 3);
SIMD.Int16x8.sub(c, d)
// Int16x8[-2, -2, -2, -2, -2, -2, -2, -2]


Specification Status Comment
The definition of 'SIMDConstructor.sub' in that specification.
Draft Initial definition.

Browser compatibility

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

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,