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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The SIMD.Int16x8 data type is a 128-bit vector divided into 8 lanes storing 16-bit signed integer values.
Figure 1: SIMD.Int16x8 in a 128-bit SIMD register
Syntax
SIMD.Int16x8(s0, s1, s2, s3, s4, s5, s6, s7);
Parameters
s[0-7]Optional- An integer specifying the value of the lane. Defaults to 0.
Constructor functions
In addition to the simple creator functions, the SIMD API provides the following constructor functions.
SIMD.Int16x8.splat()- Creates an Int16x8 with all lanes set to a given value.
You can also convert from another SIMD data type to Int16x8.
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.Int16x8(1,2,3,4,5,6,7,8); // TypeError: SIMD.Int16x8 is not a constructor var w = new SIMD.Int16x8.splat(3); // TypeError: SIMD.Int16x8.splat is not a constructor
Instead, you just write:
var v = SIMD.Int16x8(1,2,3,4,5,6,7,8); var w = SIMD.Int16x8.splat(3);
Operations
To actually do something with SIMD types, SIMD operations are needed that work on SIMD data types.
Checking SIMD types
SIMD.Int16x8.check()- Returns a new Int16x8 if the parameter is a valid Int16x8 data type. Throws a
TypeErrorotherwise.
Accessing and mutating lanes
SIMD.Int16x8.extractLane()- Returns the value of the given lane.
SIMD.Int16x8.replaceLane()- Returns a new Int16x8 with the given lane value replaced.
Loading from and storing into typed arrays
SIMD.Int16x8.load()- Returns a new Int16x8 with the lane values loaded from a typed array.
SIMD.Int16x8.store()- Stores an Int16x8 into a typed array.
Arithmetic operations
SIMD.Int16x8.add()- Returns a new Int16x8 with the lane values added (
a + b). SIMD.Int16x8.addSaturate()- Returns a new Int16x8 with the lane values added (
a + b) and saturating behavior on overflow. SIMD.Int16x8.mul()- Returns a new Int16x8 with the lane values multiplied (
a * b). SIMD.Int16x8.neg()- Returns a new Int16x8 with the negated lane values.
SIMD.Int16x8.sub()- Returns a new Int16x8 with the lane values subtracted (
a - b). SIMD.Int16x8.subSaturate()- Returns a new Int16x8 with the lane values subtracted (
a - b) and saturating behavior on overflow. -
Shuffling and swizzling
SIMD.Int16x8.shuffle()- Returns a new Int16x8 with the lane values shuffled.
SIMD.Int16x8.swizzle()- Returns a new Int16x8 with the lane values swizzled.
Selections
SIMD.Int16x8.select()- Returns a new Int16x8 with the lane values being a mix of the lanes depending on the selector mask.
Comparisons
SIMD.Int16x8.equal()- Returns a selection mask depending on
a == b. SIMD.Int16x8.notEqual()- Returns a selection mask depending on
a != b. SIMD.Int16x8.lessThan()- Returns a selection mask depending on
a < b. SIMD.Int16x8.lessThanOrEqual()- Returns a selection mask depending on
a <= b. SIMD.Int16x8.greaterThan()- Returns a selection mask depending on
a > b. SIMD.Int16x8.greaterThanOrEqual()- Returns a selection mask depending on
a >= b.
Bitwise logical operations
SIMD.Int16x8.and()- Returns a new Int16x8 with the logical AND of the lane values (
a & b). SIMD.Int16x8.or()- Returns a new Int16x8 with the logical OR of the lane values (
a | b). SIMD.Int16x8.xor()- Returns a new Int16x8 with the logical XOR of the lane values (
a ^ b). SIMD.Int16x8.not()- Returns a new Int16x8 with lane with the logical NOT of the lane values (
~a).
Bitwise shift operations
SIMD.Int16x8.shiftLeftByScalar()- Returns a new Int16x8 with the lane values shifted left by a given bit count (
a << bits). SIMD.Int16x8.shiftRightByScalar()- Returns a new Int16x8 with the lane values shifted right.
Data conversions
SIMD.Int16x8.fromFloat32x4Bits()- Creates a new Int16x8 data type with a bit-wise copy from a Float32x4.
SIMD.Int16x8.fromFloat64x2Bits()- Creates a new Int16x8 data type with a bit-wise copy from a Float64x2.
SIMD.Int16x8.fromInt32x4Bits()- Creates a new Int16x8 data type with a bit-wise copy from an Int32x4.
SIMD.Int16x8.fromInt8x16Bits()- Creates a new Int16x8 data type with a bit-wise copy from an Int8x16.
SIMD.Int16x8.fromUint32x4Bits()- Creates a new Int16x8 data type with a bit-wise copy from a Uint32x4.
SIMD.Int16x8.fromUint16x8Bits()- Creates a new Int16x8 data type with a bit-wise copy from a Uint16x8.
SIMD.Int16x8.fromUint8x16Bits()- Creates a new Int16x8 data type with a bit-wise copy from a Uint8x16.
SIMD prototype
The following methods and properties are installed on the SIMD.Int16x8.prototype.
SIMD.Int16x8.prototype.constructor- Specifies the function that creates a SIMD object's prototype.
SIMD.Int16x8.prototype.toLocaleString()- Returns a localized string representing the SIMD type and its elements. Overrides the
Object.prototype.toLocaleString()method. SIMD.Int16x8.prototype.toString()- Returns a string representing the SIMD type and its elements. Overrides the
Object.prototype.toString()method. SIMD.Int16x8.prototype.valueOf()- Returns the primitive value of a SIMD object.
SIMD.Int16x8.prototype.toSource()- Returns a string representing the source code of the object. Overrides the
Object.prototype.toSource()method.
Examples
Constructing an Int16x8
SIMD.Int16x8(1, 2, 3, 4, 5, 6, 7, 8); // Int16x8[1,2,3,4,5,6,7,8] SIMD.Int16x8(1, 2); // Int16x8[1,2,0,0,0,0,0,0] SIMD.Int16x8(); // Int16x8[0,0,0,0,0,0,0,0]
Specifications
| Specification | Status | Comment |
|---|---|---|
| SIMD The definition of 'Int16x8' 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 |