SIMD.extractLane

SIMD.js已经从TC39中取消了积极的开发，并从第三阶段中删除了。它不再被网页浏览器所追求。暴露在 web 上的SIMD 操作在 WebAssembly 中正处于积极的发展之中, 其操作基于 SIMD. js 操作。

静态SIMD.%type%.extractLane()方法返回给定通道的值。

语法

SIMD.Float32x4.extractLane(t, index)
SIMD.Float64x2.extractLane(t, index)

SIMD.Int8x16.extractLane(t, index)
SIMD.Int16x8.extractLane(t, index)
SIMD.Int32x4.extractLane(t, index)

SIMD.Uint8x16.extractLane(t, index) 
SIMD.Uint16x8.extractLane(t, index) 
SIMD.Uint32x4.extractLane(t, index)

SIMD.Bool8x16.extractLane(t, index)
SIMD.Bool16x8.extractLane(t, index)
SIMD.Bool32x4.extractLane(t, index)
SIMD.Bool64x2.extractLane(t, index)

参数

t一个相应SIMD类型的实例。索引一个索引号，表示要提取哪条通道。通道从0开始编号。

返回值

提取的通道的价。

Exceptions 异常

TypeError，如果t不是相应的SIMD类型。

RangeError，如果车道index超出范围。

例子

var t = SIMD.Float32x4(1, 2, 3, 4
SIMD.Float32x4.extractLane(t, 2 
// 3

规范

Specification	Status	Comment
SIMDThe definition of 'SIMDConstructor.extractLane' in that specification.	Draft	Initial definition.

浏览器兼容性

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