diff options
Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/built-ins/Atomics/add/expected-return-value.js | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Atomics/add/expected-return-value.js b/js/src/tests/test262/built-ins/Atomics/add/expected-return-value.js new file mode 100644 index 0000000000..2a6e701349 --- /dev/null +++ b/js/src/tests/test262/built-ins/Atomics/add/expected-return-value.js @@ -0,0 +1,39 @@ +// |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); |