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// |reftest| skip-if(!this.hasOwnProperty('Atomics')||!this.hasOwnProperty('SharedArrayBuffer')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))) -- Atomics,SharedArrayBuffer is not enabled unconditionally, ARM64 Simulator cannot emulate atomics
// Copyright (C) 2018 Rick Waldron. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-atomics.add
description: >
Atomics.add returns the value that existed at the
index prior to the operation.
info: |
Atomics.add( typedArray, index, value )
1. Return ? AtomicReadModifyWrite(typedArray, index, value, add).
AtomicReadModifyWrite( typedArray, index, value, op )
...
9. Return GetModifySetValueInBuffer(buffer, indexedPosition,
elementType, v, op).
GetModifySetValueInBuffer( arrayBuffer,
byteIndex, type, value, op [ , isLittleEndian ] )
...
16. Return RawBytesToNumber(type, rawBytesRead, isLittleEndian).
features: [Atomics, SharedArrayBuffer, TypedArray]
---*/
const i32a = new Int32Array(
new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
);
const newValue = 0b00000001000000001000000010000001;
assert.sameValue(Atomics.add(i32a, 0, newValue), 0, 'Atomics.add(i32a, 0, newValue) returns 0');
assert.sameValue(i32a[0], newValue, 'The value of i32a[0] equals the value of `newValue` (0b00000001000000001000000010000001)');
reportCompare(0, 0);
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