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IEEE 754 half-precision floating-point for JavaScript
The newest version!
/*! @petamoriken/float16 v3.9.0 | MIT License - https://github.com/petamoriken/float16 */
const THIS_IS_NOT_AN_OBJECT = "This is not an object";
const THIS_IS_NOT_A_FLOAT16ARRAY_OBJECT = "This is not a Float16Array object";
const THIS_CONSTRUCTOR_IS_NOT_A_SUBCLASS_OF_FLOAT16ARRAY =
"This constructor is not a subclass of Float16Array";
const THE_CONSTRUCTOR_PROPERTY_VALUE_IS_NOT_AN_OBJECT =
"The constructor property value is not an object";
const SPECIES_CONSTRUCTOR_DIDNT_RETURN_TYPEDARRAY_OBJECT =
"Species constructor didn't return TypedArray object";
const DERIVED_CONSTRUCTOR_CREATED_TYPEDARRAY_OBJECT_WHICH_WAS_TOO_SMALL_LENGTH =
"Derived constructor created TypedArray object which was too small length";
const ATTEMPTING_TO_ACCESS_DETACHED_ARRAYBUFFER =
"Attempting to access detached ArrayBuffer";
const CANNOT_CONVERT_UNDEFINED_OR_NULL_TO_OBJECT =
"Cannot convert undefined or null to object";
const CANNOT_MIX_BIGINT_AND_OTHER_TYPES =
"Cannot mix BigInt and other types, use explicit conversions";
const ITERATOR_PROPERTY_IS_NOT_CALLABLE = "@@iterator property is not callable";
const REDUCE_OF_EMPTY_ARRAY_WITH_NO_INITIAL_VALUE =
"Reduce of empty array with no initial value";
const THE_COMPARISON_FUNCTION_MUST_BE_EITHER_A_FUNCTION_OR_UNDEFINED =
"The comparison function must be either a function or undefined";
const OFFSET_IS_OUT_OF_BOUNDS = "Offset is out of bounds";
function uncurryThis(target) {
return (thisArg, ...args) => {
return ReflectApply(target, thisArg, args);
};
}
function uncurryThisGetter(target, key) {
return uncurryThis(
ReflectGetOwnPropertyDescriptor(
target,
key
).get
);
}
const {
apply: ReflectApply,
construct: ReflectConstruct,
defineProperty: ReflectDefineProperty,
get: ReflectGet,
getOwnPropertyDescriptor: ReflectGetOwnPropertyDescriptor,
getPrototypeOf: ReflectGetPrototypeOf,
has: ReflectHas,
ownKeys: ReflectOwnKeys,
set: ReflectSet,
setPrototypeOf: ReflectSetPrototypeOf,
} = Reflect;
const NativeProxy = Proxy;
const {
EPSILON,
MAX_SAFE_INTEGER,
isFinite: NumberIsFinite,
isNaN: NumberIsNaN,
} = Number;
const {
iterator: SymbolIterator,
species: SymbolSpecies,
toStringTag: SymbolToStringTag,
for: SymbolFor,
} = Symbol;
const NativeObject = Object;
const {
create: ObjectCreate,
defineProperty: ObjectDefineProperty,
freeze: ObjectFreeze,
is: ObjectIs,
} = NativeObject;
const ObjectPrototype = NativeObject.prototype;
const ObjectPrototype__lookupGetter__ = (ObjectPrototype).__lookupGetter__
? uncurryThis( (ObjectPrototype).__lookupGetter__)
: (object, key) => {
if (object == null) {
throw NativeTypeError(
CANNOT_CONVERT_UNDEFINED_OR_NULL_TO_OBJECT
);
}
let target = NativeObject(object);
do {
const descriptor = ReflectGetOwnPropertyDescriptor(target, key);
if (descriptor !== undefined) {
if (ObjectHasOwn(descriptor, "get")) {
return descriptor.get;
}
return;
}
} while ((target = ReflectGetPrototypeOf(target)) !== null);
};
const ObjectHasOwn = (NativeObject).hasOwn ||
uncurryThis(ObjectPrototype.hasOwnProperty);
const NativeArray = Array;
const ArrayIsArray = NativeArray.isArray;
const ArrayPrototype = NativeArray.prototype;
const ArrayPrototypeJoin = uncurryThis(ArrayPrototype.join);
const ArrayPrototypePush = uncurryThis(ArrayPrototype.push);
const ArrayPrototypeToLocaleString = uncurryThis(
ArrayPrototype.toLocaleString
);
const NativeArrayPrototypeSymbolIterator = ArrayPrototype[SymbolIterator];
const ArrayPrototypeSymbolIterator = uncurryThis(NativeArrayPrototypeSymbolIterator);
const {
abs: MathAbs,
trunc: MathTrunc,
} = Math;
const NativeArrayBuffer = ArrayBuffer;
const ArrayBufferIsView = NativeArrayBuffer.isView;
const ArrayBufferPrototype = NativeArrayBuffer.prototype;
const ArrayBufferPrototypeSlice = uncurryThis(ArrayBufferPrototype.slice);
const ArrayBufferPrototypeGetByteLength = uncurryThisGetter(ArrayBufferPrototype, "byteLength");
const NativeSharedArrayBuffer = typeof SharedArrayBuffer !== "undefined" ? SharedArrayBuffer : null;
const SharedArrayBufferPrototypeGetByteLength = NativeSharedArrayBuffer
&& uncurryThisGetter(NativeSharedArrayBuffer.prototype, "byteLength");
const TypedArray = ReflectGetPrototypeOf(Uint8Array);
const TypedArrayFrom = TypedArray.from;
const TypedArrayPrototype = TypedArray.prototype;
const NativeTypedArrayPrototypeSymbolIterator = TypedArrayPrototype[SymbolIterator];
const TypedArrayPrototypeKeys = uncurryThis(TypedArrayPrototype.keys);
const TypedArrayPrototypeValues = uncurryThis(
TypedArrayPrototype.values
);
const TypedArrayPrototypeEntries = uncurryThis(
TypedArrayPrototype.entries
);
const TypedArrayPrototypeSet = uncurryThis(TypedArrayPrototype.set);
const TypedArrayPrototypeReverse = uncurryThis(
TypedArrayPrototype.reverse
);
const TypedArrayPrototypeFill = uncurryThis(TypedArrayPrototype.fill);
const TypedArrayPrototypeCopyWithin = uncurryThis(
TypedArrayPrototype.copyWithin
);
const TypedArrayPrototypeSort = uncurryThis(TypedArrayPrototype.sort);
const TypedArrayPrototypeSlice = uncurryThis(TypedArrayPrototype.slice);
const TypedArrayPrototypeSubarray = uncurryThis(
TypedArrayPrototype.subarray
);
const TypedArrayPrototypeGetBuffer = uncurryThisGetter(
TypedArrayPrototype,
"buffer"
);
const TypedArrayPrototypeGetByteOffset = uncurryThisGetter(
TypedArrayPrototype,
"byteOffset"
);
const TypedArrayPrototypeGetLength = uncurryThisGetter(
TypedArrayPrototype,
"length"
);
const TypedArrayPrototypeGetSymbolToStringTag = uncurryThisGetter(
TypedArrayPrototype,
SymbolToStringTag
);
const NativeUint8Array = Uint8Array;
const NativeUint16Array = Uint16Array;
const Uint16ArrayFrom = (...args) => {
return ReflectApply(TypedArrayFrom, NativeUint16Array, args);
};
const NativeUint32Array = Uint32Array;
const NativeFloat32Array = Float32Array;
const ArrayIteratorPrototype = ReflectGetPrototypeOf([][SymbolIterator]());
const ArrayIteratorPrototypeNext = uncurryThis(ArrayIteratorPrototype.next);
const GeneratorPrototypeNext = uncurryThis((function* () {})().next);
const IteratorPrototype = ReflectGetPrototypeOf(ArrayIteratorPrototype);
const DataViewPrototype = DataView.prototype;
const DataViewPrototypeGetUint16 = uncurryThis(
DataViewPrototype.getUint16
);
const DataViewPrototypeSetUint16 = uncurryThis(
DataViewPrototype.setUint16
);
const NativeTypeError = TypeError;
const NativeRangeError = RangeError;
const NativeWeakSet = WeakSet;
const WeakSetPrototype = NativeWeakSet.prototype;
const WeakSetPrototypeAdd = uncurryThis(WeakSetPrototype.add);
const WeakSetPrototypeHas = uncurryThis(WeakSetPrototype.has);
const NativeWeakMap = WeakMap;
const WeakMapPrototype = NativeWeakMap.prototype;
const WeakMapPrototypeGet = uncurryThis(WeakMapPrototype.get);
const WeakMapPrototypeHas = uncurryThis(WeakMapPrototype.has);
const WeakMapPrototypeSet = uncurryThis(WeakMapPrototype.set);
const arrayIterators = new NativeWeakMap();
const SafeIteratorPrototype = ObjectCreate(null, {
next: {
value: function next() {
const arrayIterator = WeakMapPrototypeGet(arrayIterators, this);
return ArrayIteratorPrototypeNext(arrayIterator);
},
},
[SymbolIterator]: {
value: function values() {
return this;
},
},
});
function safeIfNeeded(array) {
if (
array[SymbolIterator] === NativeArrayPrototypeSymbolIterator &&
ArrayIteratorPrototype.next === ArrayIteratorPrototypeNext
) {
return array;
}
const safe = ObjectCreate(SafeIteratorPrototype);
WeakMapPrototypeSet(arrayIterators, safe, ArrayPrototypeSymbolIterator(array));
return safe;
}
const generators = new NativeWeakMap();
const DummyArrayIteratorPrototype = ObjectCreate(IteratorPrototype, {
next: {
value: function next() {
const generator = WeakMapPrototypeGet(generators, this);
return GeneratorPrototypeNext(generator);
},
writable: true,
configurable: true,
},
});
for (const key of ReflectOwnKeys(ArrayIteratorPrototype)) {
if (key === "next") {
continue;
}
ObjectDefineProperty(DummyArrayIteratorPrototype, key, ReflectGetOwnPropertyDescriptor(ArrayIteratorPrototype, key));
}
function wrap(generator) {
const dummy = ObjectCreate(DummyArrayIteratorPrototype);
WeakMapPrototypeSet(generators, dummy, generator);
return dummy;
}
function isObject(value) {
return (
(value !== null && typeof value === "object") ||
typeof value === "function"
);
}
function isObjectLike(value) {
return value !== null && typeof value === "object";
}
function isNativeTypedArray(value) {
return TypedArrayPrototypeGetSymbolToStringTag(value) !== undefined;
}
function isNativeBigIntTypedArray(value) {
const typedArrayName = TypedArrayPrototypeGetSymbolToStringTag(value);
return (
typedArrayName === "BigInt64Array" ||
typedArrayName === "BigUint64Array"
);
}
function isArrayBuffer(value) {
try {
if (ArrayIsArray(value)) {
return false;
}
ArrayBufferPrototypeGetByteLength( (value));
return true;
} catch (e) {
return false;
}
}
function isSharedArrayBuffer(value) {
if (NativeSharedArrayBuffer === null) {
return false;
}
try {
SharedArrayBufferPrototypeGetByteLength( (value));
return true;
} catch (e) {
return false;
}
}
function isAnyArrayBuffer(value) {
return isArrayBuffer(value) || isSharedArrayBuffer(value);
}
function isOrdinaryArray(value) {
if (!ArrayIsArray(value)) {
return false;
}
return (
value[SymbolIterator] === NativeArrayPrototypeSymbolIterator &&
ArrayIteratorPrototype.next === ArrayIteratorPrototypeNext
);
}
function isOrdinaryNativeTypedArray(value) {
if (!isNativeTypedArray(value)) {
return false;
}
return (
value[SymbolIterator] === NativeTypedArrayPrototypeSymbolIterator &&
ArrayIteratorPrototype.next === ArrayIteratorPrototypeNext
);
}
function isCanonicalIntegerIndexString(value) {
if (typeof value !== "string") {
return false;
}
const number = +value;
if (value !== number + "") {
return false;
}
if (!NumberIsFinite(number)) {
return false;
}
return number === MathTrunc(number);
}
const brand = SymbolFor("__Float16Array__");
function hasFloat16ArrayBrand(target) {
if (!isObjectLike(target)) {
return false;
}
const prototype = ReflectGetPrototypeOf(target);
if (!isObjectLike(prototype)) {
return false;
}
const constructor = prototype.constructor;
if (constructor === undefined) {
return false;
}
if (!isObject(constructor)) {
throw NativeTypeError(THE_CONSTRUCTOR_PROPERTY_VALUE_IS_NOT_AN_OBJECT);
}
return ReflectHas(constructor, brand);
}
const INVERSE_OF_EPSILON = 1 / EPSILON;
function roundTiesToEven(num) {
return (num + INVERSE_OF_EPSILON) - INVERSE_OF_EPSILON;
}
const FLOAT16_MIN_VALUE = 6.103515625e-05;
const FLOAT16_MAX_VALUE = 65504;
const FLOAT16_EPSILON = 0.0009765625;
const FLOAT16_EPSILON_MULTIPLIED_BY_FLOAT16_MIN_VALUE = FLOAT16_EPSILON * FLOAT16_MIN_VALUE;
const FLOAT16_EPSILON_DEVIDED_BY_EPSILON = FLOAT16_EPSILON * INVERSE_OF_EPSILON;
function roundToFloat16(num) {
const number = +num;
if (!NumberIsFinite(number) || number === 0) {
return number;
}
const sign = number > 0 ? 1 : -1;
const absolute = MathAbs(number);
if (absolute < FLOAT16_MIN_VALUE) {
return sign * roundTiesToEven(absolute / FLOAT16_EPSILON_MULTIPLIED_BY_FLOAT16_MIN_VALUE) * FLOAT16_EPSILON_MULTIPLIED_BY_FLOAT16_MIN_VALUE;
}
const temp = (1 + FLOAT16_EPSILON_DEVIDED_BY_EPSILON) * absolute;
const result = temp - (temp - absolute);
if (result > FLOAT16_MAX_VALUE || NumberIsNaN(result)) {
return sign * Infinity;
}
return sign * result;
}
const buffer = new NativeArrayBuffer(4);
const floatView = new NativeFloat32Array(buffer);
const uint32View = new NativeUint32Array(buffer);
const baseTable = new NativeUint16Array(512);
const shiftTable = new NativeUint8Array(512);
for (let i = 0; i < 256; ++i) {
const e = i - 127;
if (e < -24) {
baseTable[i] = 0x0000;
baseTable[i | 0x100] = 0x8000;
shiftTable[i] = 24;
shiftTable[i | 0x100] = 24;
} else if (e < -14) {
baseTable[i] = 0x0400 >> (-e - 14);
baseTable[i | 0x100] = (0x0400 >> (-e - 14)) | 0x8000;
shiftTable[i] = -e - 1;
shiftTable[i | 0x100] = -e - 1;
} else if (e <= 15) {
baseTable[i] = (e + 15) << 10;
baseTable[i | 0x100] = ((e + 15) << 10) | 0x8000;
shiftTable[i] = 13;
shiftTable[i | 0x100] = 13;
} else if (e < 128) {
baseTable[i] = 0x7c00;
baseTable[i | 0x100] = 0xfc00;
shiftTable[i] = 24;
shiftTable[i | 0x100] = 24;
} else {
baseTable[i] = 0x7c00;
baseTable[i | 0x100] = 0xfc00;
shiftTable[i] = 13;
shiftTable[i | 0x100] = 13;
}
}
function roundToFloat16Bits(num) {
floatView[0] = roundToFloat16(num);
const f = uint32View[0];
const e = (f >> 23) & 0x1ff;
return baseTable[e] + ((f & 0x007fffff) >> shiftTable[e]);
}
const mantissaTable = new NativeUint32Array(2048);
for (let i = 1; i < 1024; ++i) {
let m = i << 13;
let e = 0;
while ((m & 0x00800000) === 0) {
m <<= 1;
e -= 0x00800000;
}
m &= ~0x00800000;
e += 0x38800000;
mantissaTable[i] = m | e;
}
for (let i = 1024; i < 2048; ++i) {
mantissaTable[i] = 0x38000000 + ((i - 1024) << 13);
}
const exponentTable = new NativeUint32Array(64);
for (let i = 1; i < 31; ++i) {
exponentTable[i] = i << 23;
}
exponentTable[31] = 0x47800000;
exponentTable[32] = 0x80000000;
for (let i = 33; i < 63; ++i) {
exponentTable[i] = 0x80000000 + ((i - 32) << 23);
}
exponentTable[63] = 0xc7800000;
const offsetTable = new NativeUint16Array(64);
for (let i = 1; i < 64; ++i) {
if (i !== 32) {
offsetTable[i] = 1024;
}
}
function convertToNumber(float16bits) {
const i = float16bits >> 10;
uint32View[0] = mantissaTable[offsetTable[i] + (float16bits & 0x3ff)] + exponentTable[i];
return floatView[0];
}
function ToIntegerOrInfinity(target) {
const number = +target;
if (NumberIsNaN(number) || number === 0) {
return 0;
}
return MathTrunc(number);
}
function ToLength(target) {
const length = ToIntegerOrInfinity(target);
if (length < 0) {
return 0;
}
return length < MAX_SAFE_INTEGER
? length
: MAX_SAFE_INTEGER;
}
function SpeciesConstructor(target, defaultConstructor) {
if (!isObject(target)) {
throw NativeTypeError(THIS_IS_NOT_AN_OBJECT);
}
const constructor = target.constructor;
if (constructor === undefined) {
return defaultConstructor;
}
if (!isObject(constructor)) {
throw NativeTypeError(THE_CONSTRUCTOR_PROPERTY_VALUE_IS_NOT_AN_OBJECT);
}
const species = constructor[SymbolSpecies];
if (species == null) {
return defaultConstructor;
}
return species;
}
function IsDetachedBuffer(buffer) {
if (isSharedArrayBuffer(buffer)) {
return false;
}
try {
ArrayBufferPrototypeSlice(buffer, 0, 0);
return false;
} catch (e) {}
return true;
}
function defaultCompare(x, y) {
const isXNaN = NumberIsNaN(x);
const isYNaN = NumberIsNaN(y);
if (isXNaN && isYNaN) {
return 0;
}
if (isXNaN) {
return 1;
}
if (isYNaN) {
return -1;
}
if (x < y) {
return -1;
}
if (x > y) {
return 1;
}
if (x === 0 && y === 0) {
const isXPlusZero = ObjectIs(x, 0);
const isYPlusZero = ObjectIs(y, 0);
if (!isXPlusZero && isYPlusZero) {
return -1;
}
if (isXPlusZero && !isYPlusZero) {
return 1;
}
}
return 0;
}
const BYTES_PER_ELEMENT = 2;
const float16bitsArrays = new NativeWeakMap();
function isFloat16Array(target) {
return WeakMapPrototypeHas(float16bitsArrays, target) ||
(!ArrayBufferIsView(target) && hasFloat16ArrayBrand(target));
}
function assertFloat16Array(target) {
if (!isFloat16Array(target)) {
throw NativeTypeError(THIS_IS_NOT_A_FLOAT16ARRAY_OBJECT);
}
}
function assertSpeciesTypedArray(target, count) {
const isTargetFloat16Array = isFloat16Array(target);
const isTargetTypedArray = isNativeTypedArray(target);
if (!isTargetFloat16Array && !isTargetTypedArray) {
throw NativeTypeError(SPECIES_CONSTRUCTOR_DIDNT_RETURN_TYPEDARRAY_OBJECT);
}
if (typeof count === "number") {
let length;
if (isTargetFloat16Array) {
const float16bitsArray = getFloat16BitsArray(target);
length = TypedArrayPrototypeGetLength(float16bitsArray);
} else {
length = TypedArrayPrototypeGetLength(target);
}
if (length < count) {
throw NativeTypeError(
DERIVED_CONSTRUCTOR_CREATED_TYPEDARRAY_OBJECT_WHICH_WAS_TOO_SMALL_LENGTH
);
}
}
if (isNativeBigIntTypedArray(target)) {
throw NativeTypeError(CANNOT_MIX_BIGINT_AND_OTHER_TYPES);
}
}
function getFloat16BitsArray(float16) {
const float16bitsArray = WeakMapPrototypeGet(float16bitsArrays, float16);
if (float16bitsArray !== undefined) {
const buffer = TypedArrayPrototypeGetBuffer(float16bitsArray);
if (IsDetachedBuffer(buffer)) {
throw NativeTypeError(ATTEMPTING_TO_ACCESS_DETACHED_ARRAYBUFFER);
}
return float16bitsArray;
}
const buffer = (float16).buffer;
if (IsDetachedBuffer(buffer)) {
throw NativeTypeError(ATTEMPTING_TO_ACCESS_DETACHED_ARRAYBUFFER);
}
const cloned = ReflectConstruct(Float16Array, [
buffer,
(float16).byteOffset,
(float16).length,
], float16.constructor);
return WeakMapPrototypeGet(float16bitsArrays, cloned);
}
function copyToArray(float16bitsArray) {
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const array = [];
for (let i = 0; i < length; ++i) {
array[i] = convertToNumber(float16bitsArray[i]);
}
return array;
}
const TypedArrayPrototypeGetters = new NativeWeakSet();
for (const key of ReflectOwnKeys(TypedArrayPrototype)) {
if (key === SymbolToStringTag) {
continue;
}
const descriptor = ReflectGetOwnPropertyDescriptor(TypedArrayPrototype, key);
if (ObjectHasOwn(descriptor, "get") && typeof descriptor.get === "function") {
WeakSetPrototypeAdd(TypedArrayPrototypeGetters, descriptor.get);
}
}
const handler = ObjectFreeze( ({
get(target, key, receiver) {
if (isCanonicalIntegerIndexString(key) && ObjectHasOwn(target, key)) {
return convertToNumber(ReflectGet(target, key));
}
if (WeakSetPrototypeHas(TypedArrayPrototypeGetters, ObjectPrototype__lookupGetter__(target, key))) {
return ReflectGet(target, key);
}
return ReflectGet(target, key, receiver);
},
set(target, key, value, receiver) {
if (isCanonicalIntegerIndexString(key) && ObjectHasOwn(target, key)) {
return ReflectSet(target, key, roundToFloat16Bits(value));
}
return ReflectSet(target, key, value, receiver);
},
getOwnPropertyDescriptor(target, key) {
if (isCanonicalIntegerIndexString(key) && ObjectHasOwn(target, key)) {
const descriptor = ReflectGetOwnPropertyDescriptor(target, key);
descriptor.value = convertToNumber(descriptor.value);
return descriptor;
}
return ReflectGetOwnPropertyDescriptor(target, key);
},
defineProperty(target, key, descriptor) {
if (
isCanonicalIntegerIndexString(key) &&
ObjectHasOwn(target, key) &&
ObjectHasOwn(descriptor, "value")
) {
descriptor.value = roundToFloat16Bits(descriptor.value);
return ReflectDefineProperty(target, key, descriptor);
}
return ReflectDefineProperty(target, key, descriptor);
},
}));
class Float16Array {
constructor(input, _byteOffset, _length) {
let float16bitsArray;
if (isFloat16Array(input)) {
float16bitsArray = ReflectConstruct(NativeUint16Array, [getFloat16BitsArray(input)], new.target);
} else if (isObject(input) && !isAnyArrayBuffer(input)) {
let list;
let length;
if (isNativeTypedArray(input)) {
list = input;
length = TypedArrayPrototypeGetLength(input);
const buffer = TypedArrayPrototypeGetBuffer(input);
if (IsDetachedBuffer(buffer)) {
throw NativeTypeError(ATTEMPTING_TO_ACCESS_DETACHED_ARRAYBUFFER);
}
if (isNativeBigIntTypedArray(input)) {
throw NativeTypeError(CANNOT_MIX_BIGINT_AND_OTHER_TYPES);
}
const data = new NativeArrayBuffer(
length * BYTES_PER_ELEMENT
);
float16bitsArray = ReflectConstruct(NativeUint16Array, [data], new.target);
} else {
const iterator = input[SymbolIterator];
if (iterator != null && typeof iterator !== "function") {
throw NativeTypeError(ITERATOR_PROPERTY_IS_NOT_CALLABLE);
}
if (iterator != null) {
if (isOrdinaryArray(input)) {
list = input;
length = input.length;
} else {
list = [... (input)];
length = list.length;
}
} else {
list = (input);
length = ToLength(list.length);
}
float16bitsArray = ReflectConstruct(NativeUint16Array, [length], new.target);
}
for (let i = 0; i < length; ++i) {
float16bitsArray[i] = roundToFloat16Bits(list[i]);
}
} else {
float16bitsArray = ReflectConstruct(NativeUint16Array, arguments, new.target);
}
const proxy = (new NativeProxy(float16bitsArray, handler));
WeakMapPrototypeSet(float16bitsArrays, proxy, float16bitsArray);
return proxy;
}
static from(src, ...opts) {
const Constructor = this;
if (!ReflectHas(Constructor, brand)) {
throw NativeTypeError(
THIS_CONSTRUCTOR_IS_NOT_A_SUBCLASS_OF_FLOAT16ARRAY
);
}
if (Constructor === Float16Array) {
if (isFloat16Array(src) && opts.length === 0) {
const float16bitsArray = getFloat16BitsArray(src);
const uint16 = new NativeUint16Array(
TypedArrayPrototypeGetBuffer(float16bitsArray),
TypedArrayPrototypeGetByteOffset(float16bitsArray),
TypedArrayPrototypeGetLength(float16bitsArray)
);
return new Float16Array(
TypedArrayPrototypeGetBuffer(TypedArrayPrototypeSlice(uint16))
);
}
if (opts.length === 0) {
return new Float16Array(
TypedArrayPrototypeGetBuffer(
Uint16ArrayFrom(src, roundToFloat16Bits)
)
);
}
const mapFunc = opts[0];
const thisArg = opts[1];
return new Float16Array(
TypedArrayPrototypeGetBuffer(
Uint16ArrayFrom(src, function (val, ...args) {
return roundToFloat16Bits(
ReflectApply(mapFunc, this, [val, ...safeIfNeeded(args)])
);
}, thisArg)
)
);
}
let list;
let length;
const iterator = src[SymbolIterator];
if (iterator != null && typeof iterator !== "function") {
throw NativeTypeError(ITERATOR_PROPERTY_IS_NOT_CALLABLE);
}
if (iterator != null) {
if (isOrdinaryArray(src)) {
list = src;
length = src.length;
} else if (isOrdinaryNativeTypedArray(src)) {
list = src;
length = TypedArrayPrototypeGetLength(src);
} else {
list = [...src];
length = list.length;
}
} else {
if (src == null) {
throw NativeTypeError(
CANNOT_CONVERT_UNDEFINED_OR_NULL_TO_OBJECT
);
}
list = NativeObject(src);
length = ToLength(list.length);
}
const array = new Constructor(length);
if (opts.length === 0) {
for (let i = 0; i < length; ++i) {
array[i] = (list[i]);
}
} else {
const mapFunc = opts[0];
const thisArg = opts[1];
for (let i = 0; i < length; ++i) {
array[i] = ReflectApply(mapFunc, thisArg, [list[i], i]);
}
}
return array;
}
static of(...items) {
const Constructor = this;
if (!ReflectHas(Constructor, brand)) {
throw NativeTypeError(
THIS_CONSTRUCTOR_IS_NOT_A_SUBCLASS_OF_FLOAT16ARRAY
);
}
const length = items.length;
if (Constructor === Float16Array) {
const proxy = new Float16Array(length);
const float16bitsArray = getFloat16BitsArray(proxy);
for (let i = 0; i < length; ++i) {
float16bitsArray[i] = roundToFloat16Bits(items[i]);
}
return proxy;
}
const array = new Constructor(length);
for (let i = 0; i < length; ++i) {
array[i] = items[i];
}
return array;
}
keys() {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
return TypedArrayPrototypeKeys(float16bitsArray);
}
values() {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
return wrap((function* () {
for (const val of TypedArrayPrototypeValues(float16bitsArray)) {
yield convertToNumber(val);
}
})());
}
entries() {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
return wrap((function* () {
for (const [i, val] of TypedArrayPrototypeEntries(float16bitsArray)) {
yield ([i, convertToNumber(val)]);
}
})());
}
at(index) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const relativeIndex = ToIntegerOrInfinity(index);
const k = relativeIndex >= 0 ? relativeIndex : length + relativeIndex;
if (k < 0 || k >= length) {
return;
}
return convertToNumber(float16bitsArray[k]);
}
with(index, value) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const relativeIndex = ToIntegerOrInfinity(index);
const k = relativeIndex >= 0 ? relativeIndex : length + relativeIndex;
const number = +value;
if (k < 0 || k >= length) {
throw NativeRangeError(OFFSET_IS_OUT_OF_BOUNDS);
}
const uint16 = new NativeUint16Array(
TypedArrayPrototypeGetBuffer(float16bitsArray),
TypedArrayPrototypeGetByteOffset(float16bitsArray),
TypedArrayPrototypeGetLength(float16bitsArray)
);
const cloned = new Float16Array(
TypedArrayPrototypeGetBuffer(
TypedArrayPrototypeSlice(uint16)
)
);
const array = getFloat16BitsArray(cloned);
array[k] = roundToFloat16Bits(number);
return cloned;
}
map(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
const Constructor = SpeciesConstructor(float16bitsArray, Float16Array);
if (Constructor === Float16Array) {
const proxy = new Float16Array(length);
const array = getFloat16BitsArray(proxy);
for (let i = 0; i < length; ++i) {
const val = convertToNumber(float16bitsArray[i]);
array[i] = roundToFloat16Bits(
ReflectApply(callback, thisArg, [val, i, this])
);
}
return proxy;
}
const array = new Constructor(length);
assertSpeciesTypedArray(array, length);
for (let i = 0; i < length; ++i) {
const val = convertToNumber(float16bitsArray[i]);
array[i] = ReflectApply(callback, thisArg, [val, i, this]);
}
return (array);
}
filter(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
const kept = [];
for (let i = 0; i < length; ++i) {
const val = convertToNumber(float16bitsArray[i]);
if (ReflectApply(callback, thisArg, [val, i, this])) {
ArrayPrototypePush(kept, val);
}
}
const Constructor = SpeciesConstructor(float16bitsArray, Float16Array);
const array = new Constructor(kept);
assertSpeciesTypedArray(array);
return (array);
}
reduce(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
if (length === 0 && opts.length === 0) {
throw NativeTypeError(REDUCE_OF_EMPTY_ARRAY_WITH_NO_INITIAL_VALUE);
}
let accumulator, start;
if (opts.length === 0) {
accumulator = convertToNumber(float16bitsArray[0]);
start = 1;
} else {
accumulator = opts[0];
start = 0;
}
for (let i = start; i < length; ++i) {
accumulator = callback(
accumulator,
convertToNumber(float16bitsArray[i]),
i,
this
);
}
return accumulator;
}
reduceRight(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
if (length === 0 && opts.length === 0) {
throw NativeTypeError(REDUCE_OF_EMPTY_ARRAY_WITH_NO_INITIAL_VALUE);
}
let accumulator, start;
if (opts.length === 0) {
accumulator = convertToNumber(float16bitsArray[length - 1]);
start = length - 2;
} else {
accumulator = opts[0];
start = length - 1;
}
for (let i = start; i >= 0; --i) {
accumulator = callback(
accumulator,
convertToNumber(float16bitsArray[i]),
i,
this
);
}
return accumulator;
}
forEach(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
for (let i = 0; i < length; ++i) {
ReflectApply(callback, thisArg, [
convertToNumber(float16bitsArray[i]),
i,
this,
]);
}
}
find(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
for (let i = 0; i < length; ++i) {
const value = convertToNumber(float16bitsArray[i]);
if (ReflectApply(callback, thisArg, [value, i, this])) {
return value;
}
}
}
findIndex(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
for (let i = 0; i < length; ++i) {
const value = convertToNumber(float16bitsArray[i]);
if (ReflectApply(callback, thisArg, [value, i, this])) {
return i;
}
}
return -1;
}
findLast(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
for (let i = length - 1; i >= 0; --i) {
const value = convertToNumber(float16bitsArray[i]);
if (ReflectApply(callback, thisArg, [value, i, this])) {
return value;
}
}
}
findLastIndex(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
for (let i = length - 1; i >= 0; --i) {
const value = convertToNumber(float16bitsArray[i]);
if (ReflectApply(callback, thisArg, [value, i, this])) {
return i;
}
}
return -1;
}
every(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
for (let i = 0; i < length; ++i) {
if (
!ReflectApply(callback, thisArg, [
convertToNumber(float16bitsArray[i]),
i,
this,
])
) {
return false;
}
}
return true;
}
some(callback, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const thisArg = opts[0];
for (let i = 0; i < length; ++i) {
if (
ReflectApply(callback, thisArg, [
convertToNumber(float16bitsArray[i]),
i,
this,
])
) {
return true;
}
}
return false;
}
set(input, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const targetOffset = ToIntegerOrInfinity(opts[0]);
if (targetOffset < 0) {
throw NativeRangeError(OFFSET_IS_OUT_OF_BOUNDS);
}
if (input == null) {
throw NativeTypeError(
CANNOT_CONVERT_UNDEFINED_OR_NULL_TO_OBJECT
);
}
if (isNativeBigIntTypedArray(input)) {
throw NativeTypeError(
CANNOT_MIX_BIGINT_AND_OTHER_TYPES
);
}
if (isFloat16Array(input)) {
return TypedArrayPrototypeSet(
getFloat16BitsArray(this),
getFloat16BitsArray(input),
targetOffset
);
}
if (isNativeTypedArray(input)) {
const buffer = TypedArrayPrototypeGetBuffer(input);
if (IsDetachedBuffer(buffer)) {
throw NativeTypeError(ATTEMPTING_TO_ACCESS_DETACHED_ARRAYBUFFER);
}
}
const targetLength = TypedArrayPrototypeGetLength(float16bitsArray);
const src = NativeObject(input);
const srcLength = ToLength(src.length);
if (targetOffset === Infinity || srcLength + targetOffset > targetLength) {
throw NativeRangeError(OFFSET_IS_OUT_OF_BOUNDS);
}
for (let i = 0; i < srcLength; ++i) {
float16bitsArray[i + targetOffset] = roundToFloat16Bits(src[i]);
}
}
reverse() {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
TypedArrayPrototypeReverse(float16bitsArray);
return this;
}
toReversed() {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const uint16 = new NativeUint16Array(
TypedArrayPrototypeGetBuffer(float16bitsArray),
TypedArrayPrototypeGetByteOffset(float16bitsArray),
TypedArrayPrototypeGetLength(float16bitsArray)
);
const cloned = new Float16Array(
TypedArrayPrototypeGetBuffer(
TypedArrayPrototypeSlice(uint16)
)
);
const clonedFloat16bitsArray = getFloat16BitsArray(cloned);
TypedArrayPrototypeReverse(clonedFloat16bitsArray);
return cloned;
}
fill(value, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
TypedArrayPrototypeFill(
float16bitsArray,
roundToFloat16Bits(value),
...safeIfNeeded(opts)
);
return this;
}
copyWithin(target, start, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
TypedArrayPrototypeCopyWithin(float16bitsArray, target, start, ...safeIfNeeded(opts));
return this;
}
sort(compareFn) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const sortCompare = compareFn !== undefined ? compareFn : defaultCompare;
TypedArrayPrototypeSort(float16bitsArray, (x, y) => {
return sortCompare(convertToNumber(x), convertToNumber(y));
});
return this;
}
toSorted(compareFn) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
if (compareFn !== undefined && typeof compareFn !== "function") {
throw new NativeTypeError(THE_COMPARISON_FUNCTION_MUST_BE_EITHER_A_FUNCTION_OR_UNDEFINED);
}
const sortCompare = compareFn !== undefined ? compareFn : defaultCompare;
const uint16 = new NativeUint16Array(
TypedArrayPrototypeGetBuffer(float16bitsArray),
TypedArrayPrototypeGetByteOffset(float16bitsArray),
TypedArrayPrototypeGetLength(float16bitsArray)
);
const cloned = new Float16Array(
TypedArrayPrototypeGetBuffer(
TypedArrayPrototypeSlice(uint16)
)
);
const clonedFloat16bitsArray = getFloat16BitsArray(cloned);
TypedArrayPrototypeSort(clonedFloat16bitsArray, (x, y) => {
return sortCompare(convertToNumber(x), convertToNumber(y));
});
return cloned;
}
slice(start, end) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const Constructor = SpeciesConstructor(float16bitsArray, Float16Array);
if (Constructor === Float16Array) {
const uint16 = new NativeUint16Array(
TypedArrayPrototypeGetBuffer(float16bitsArray),
TypedArrayPrototypeGetByteOffset(float16bitsArray),
TypedArrayPrototypeGetLength(float16bitsArray)
);
return new Float16Array(
TypedArrayPrototypeGetBuffer(
TypedArrayPrototypeSlice(uint16, start, end)
)
);
}
const length = TypedArrayPrototypeGetLength(float16bitsArray);
const relativeStart = ToIntegerOrInfinity(start);
const relativeEnd = end === undefined ? length : ToIntegerOrInfinity(end);
let k;
if (relativeStart === -Infinity) {
k = 0;
} else if (relativeStart < 0) {
k = length + relativeStart > 0 ? length + relativeStart : 0;
} else {
k = length < relativeStart ? length : relativeStart;
}
let final;
if (relativeEnd === -Infinity) {
final = 0;
} else if (relativeEnd < 0) {
final = length + relativeEnd > 0 ? length + relativeEnd : 0;
} else {
final = length < relativeEnd ? length : relativeEnd;
}
const count = final - k > 0 ? final - k : 0;
const array = new Constructor(count);
assertSpeciesTypedArray(array, count);
if (count === 0) {
return array;
}
const buffer = TypedArrayPrototypeGetBuffer(float16bitsArray);
if (IsDetachedBuffer(buffer)) {
throw NativeTypeError(ATTEMPTING_TO_ACCESS_DETACHED_ARRAYBUFFER);
}
let n = 0;
while (k < final) {
array[n] = convertToNumber(float16bitsArray[k]);
++k;
++n;
}
return (array);
}
subarray(begin, end) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const Constructor = SpeciesConstructor(float16bitsArray, Float16Array);
const uint16 = new NativeUint16Array(
TypedArrayPrototypeGetBuffer(float16bitsArray),
TypedArrayPrototypeGetByteOffset(float16bitsArray),
TypedArrayPrototypeGetLength(float16bitsArray)
);
const uint16Subarray = TypedArrayPrototypeSubarray(uint16, begin, end);
const array = new Constructor(
TypedArrayPrototypeGetBuffer(uint16Subarray),
TypedArrayPrototypeGetByteOffset(uint16Subarray),
TypedArrayPrototypeGetLength(uint16Subarray)
);
assertSpeciesTypedArray(array);
return (array);
}
indexOf(element, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
let from = ToIntegerOrInfinity(opts[0]);
if (from === Infinity) {
return -1;
}
if (from < 0) {
from += length;
if (from < 0) {
from = 0;
}
}
for (let i = from; i < length; ++i) {
if (
ObjectHasOwn(float16bitsArray, i) &&
convertToNumber(float16bitsArray[i]) === element
) {
return i;
}
}
return -1;
}
lastIndexOf(element, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
let from = opts.length >= 1 ? ToIntegerOrInfinity(opts[0]) : length - 1;
if (from === -Infinity) {
return -1;
}
if (from >= 0) {
from = from < length - 1 ? from : length - 1;
} else {
from += length;
}
for (let i = from; i >= 0; --i) {
if (
ObjectHasOwn(float16bitsArray, i) &&
convertToNumber(float16bitsArray[i]) === element
) {
return i;
}
}
return -1;
}
includes(element, ...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const length = TypedArrayPrototypeGetLength(float16bitsArray);
let from = ToIntegerOrInfinity(opts[0]);
if (from === Infinity) {
return false;
}
if (from < 0) {
from += length;
if (from < 0) {
from = 0;
}
}
const isNaN = NumberIsNaN(element);
for (let i = from; i < length; ++i) {
const value = convertToNumber(float16bitsArray[i]);
if (isNaN && NumberIsNaN(value)) {
return true;
}
if (value === element) {
return true;
}
}
return false;
}
join(separator) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const array = copyToArray(float16bitsArray);
return ArrayPrototypeJoin(array, separator);
}
toLocaleString(...opts) {
assertFloat16Array(this);
const float16bitsArray = getFloat16BitsArray(this);
const array = copyToArray(float16bitsArray);
return ArrayPrototypeToLocaleString(array, ...safeIfNeeded(opts));
}
get [SymbolToStringTag]() {
if (isFloat16Array(this)) {
return ("Float16Array");
}
}
}
ObjectDefineProperty(Float16Array, "BYTES_PER_ELEMENT", {
value: BYTES_PER_ELEMENT,
});
ObjectDefineProperty(Float16Array, brand, {});
ReflectSetPrototypeOf(Float16Array, TypedArray);
const Float16ArrayPrototype = Float16Array.prototype;
ObjectDefineProperty(Float16ArrayPrototype, "BYTES_PER_ELEMENT", {
value: BYTES_PER_ELEMENT,
});
ObjectDefineProperty(Float16ArrayPrototype, SymbolIterator, {
value: Float16ArrayPrototype.values,
writable: true,
configurable: true,
});
ReflectSetPrototypeOf(Float16ArrayPrototype, TypedArrayPrototype);
function isTypedArray(target) {
return isNativeTypedArray(target) || isFloat16Array(target);
}
function getFloat16(dataView, byteOffset, ...opts) {
return convertToNumber(
DataViewPrototypeGetUint16(dataView, byteOffset, ...safeIfNeeded(opts))
);
}
function setFloat16(dataView, byteOffset, value, ...opts) {
return DataViewPrototypeSetUint16(
dataView,
byteOffset,
roundToFloat16Bits(value),
...safeIfNeeded(opts)
);
}
function f16round(x) {
return roundToFloat16(x);
}
export { Float16Array, f16round, getFloat16, f16round as hfround, isFloat16Array, isTypedArray, setFloat16 };
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