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// Copyright (C) 2018 Valerie Young. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-typedarray-object
description: >
Behavior for input array of BigInts
info: |
TypedArray ( object )
This description applies only if the TypedArray function is called with at
least one argument and the Type of the first argument is Object and that
object does not have either a [[TypedArrayName]] or an [[ArrayBufferData]]
internal slot.
...
8. Repeat, while k < len
...
b. Let kValue be ? Get(arrayLike, Pk).
c. Perform ? Set(O, Pk, kValue, true).
...
[[Set]] ( P, V, Receiver)
...
2. If Type(P) is String and if SameValue(O, Receiver) is true, then
a. Let numericIndex be ! CanonicalNumericIndexString(P).
b. If numericIndex is not undefined, then
i. Return ? IntegerIndexedElementSet(O, numericIndex, V).
...
IntegerIndexedElementSet ( O, index, value )
...
5. If arrayTypeName is "BigUint64Array" or "BigInt64Array",
let numValue be ? ToBigInt(value).
...
15. Perform SetValueInBuffer(buffer, indexedPosition, elementType, numValue, true, "Unordered").
// NOTE: type will be set to BigUint64 in this test
16. Return true.
SetValueInBuffer ( arrayBuffer, byteIndex, type, value, isTypedArray, order [ , isLittleEndian ] )
...
8. Let rawBytes be NumberToRawBytes(type, value, isLittleEndian).
...
NumberToRawBytes( type, value, isLittleEndian )
...
3. Else,
a. Let n be the Number value of the Element Size specified in Table
[The TypedArray Constructors] for Element Type type.
b. Let convOp be the abstract operation named in the Conversion Operation
column in Table 9 for Element Type type.
The TypedArray Constructors
Element Type: BigUint64
Conversion Operation: ToBigUint64
ToBigUint64 ( argument )
The abstract operation ToBigInt64 converts argument to one of 264 integer
values in the range -2^63 through 2^63-1, inclusive.
This abstract operation functions as follows:
1. Let n be ? ToBigInt(argument).
2. Let int64bit be n modulo 2^64.
3. Return int64bit.
includes: [testBigIntTypedArray.js]
features: [BigInt, TypedArray]
---*/
var vals = [
18446744073709551618n, // 2n ** 64n + 2n
9223372036854775810n, // 2n ** 63n + 2n
2n,
0n,
-2n,
-9223372036854775810n, // -(2n ** 63n) - 2n
-18446744073709551618n, // -(2n ** 64n) - 2n
];
var typedArray = new BigUint64Array(vals);
assert.sameValue(typedArray[0], 2n,
"ToBigUint64(2n ** 64n + 2n) => 2n");
assert.sameValue(typedArray[1], 9223372036854775810n, // 2n ** 63n + 2n
"ToBigUint64(2n ** 63n + 2n) => 9223372036854775810");
assert.sameValue(typedArray[2], 2n,
"ToBigUint64(2n) => 2n");
assert.sameValue(typedArray[3], 0n,
"ToBigUint64(0n) => 0n");
assert.sameValue(typedArray[4], 18446744073709551614n, // 2n ** 64n - 2n
"ToBigUint64( -2n) => 18446744073709551614n");
assert.sameValue(typedArray[5], 9223372036854775806n, // 2n ** 63n - 2n
"ToBigUint64( -(2n ** 63n) - 2n) => 9223372036854775806n");
assert.sameValue(typedArray[6], 18446744073709551614n, // 2n ** 64n - 2n
"ToBigUint64( -(2n ** 64n) - 2n) => 18446744073709551614n");
|
