SIMD.reciprocalApproximation

The static SIMD.%type%.reciprocalApproximation() method returns a new instance with an approximation of the reciprocal lane values (1 / x).

Syntax

SIMD.Float32x4.reciprocalApproximation(t)
SIMD.Float64x2.reciprocalApproximation(t)

Parameters

t

An instance of a corresponding SIMD type.

Return value

A new corresponding SIMD data type with reciprocal lane values (1 / x).

Description

The SIMD.%type%.reciprocalApproximation() is an approximation of the reciprocal of the lane values. This means that an estimation of the reciprocal of a number is calculated and that there can be a small amount of errors. The Newton-Raphson division, for example, is one of the fast division methods that calculates an estimation. See also this ARM/NEON FAQ article.

Examples

var a = SIMD.Float32x4(1, 2, 3, 4);
SIMD.Float32x4.reciprocalApproximation(a);
// Float32x4[1, 0.5, 0.3333333432674408, 0.25]

var b = SIMD.Float64x2(0, Infinity);
SIMD.Float64x2.reciprocalApproximation(b);
// Float64x2[Infinity, 0]

Specifications

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

Browser compatibility

See also

• SIMD