JavaScript 中文开发手册
JavaScript 中文开发手册
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SIMD.fromInt32x4Bits (SIMD) - JavaScript 中文开发手册
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%.fromInt32x4Bits()方法使用Int32x4的按位副本创建新的SIMD数据类型。
语法
SIMD.Float64x2.fromInt32x4Bits(t) SIMD.Float32x4.fromInt32x4Bits(t) SIMD.Int16x8.fromInt32x4Bits(t) SIMD.Int8x16.fromInt32x4Bits(t) SIMD.Uint32x4.fromInt32x4Bits(t) SIMD.Uint16x8.fromInt32x4Bits(t) SIMD.Uint8x16.fromInt32x4Bits(t)
参数
t从（按位）转换的Int32x4 SIMD类型。
返回值
一个新的SIMD数据类型，从Int32x4按位拷贝。
例子
SIMD.Float64x2.fromInt32x4Bits
var t = SIMD.Int32x4(0, 1072693248, 0, 1073741824); SIMD.Float64x2.fromInt32x4Bits(t); // Float64x2[1, 2]
SIMD.Float32x4.fromInt32x4Bits
var t = SIMD.Int32x4(1065353216, 1073741824, 1077936128, 1082130432); SIMD.Float32x4.fromInt32x4Bits(t); // Float32x4[1,2,3,4]
SIMD.Int16x8.fromInt32x4Bits
var t = SIMD.Int32x4(1, 2, 3, 4); SIMD.Int16x8.fromInt32x4Bits(t); // Int16x8[1, 0, 2, 0, 3, 0, 4, 0]
SIMD.Int8x16.fromInt32x4Bits
var t = SIMD.Int32x4(1, 2, 3, 4); SIMD.Int8x16.fromInt32x4Bits(t); // Int8x16[1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 4, 0, 0, 0]
规范
|
Specification |
Status |
Comment |
|---|---|---|
|
SIMDThe definition of 'SIMDConstructor.fromTIMDBits' 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 |