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Bug 1246140 - test for Atomics.store return value. r=h4writer

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--HG--
extra : rebase_source : 295551f9a9a82bab3ca0afbc500478c81f2eecb3
This commit is contained in:
Lars T Hansen 2016-11-04 13:01:42 +01:00
parent 03a640d849
commit 43b9660b7f
1 changed files with 42 additions and 0 deletions
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42
js/src/jit-test/tests/atomics/store-does-not-truncate-returnval.js Normal file
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@ -0,0 +1,42 @@
if (!this.SharedArrayBuffer)
quit(0);
var ia = new Int32Array(new SharedArrayBuffer(4));
// Atomics.store() returns the input value converted to integer as if
// by ToInteger.
//
// JIT and interpreter have different paths here, so loop a little to
// trigger the JIT properly.
function f() {
assertEq(Atomics.store(ia, 0, 3.5), 3);
assertEq(ia[0], 3);
assertEq(Atomics.store(ia, 0, -0), -0);
assertEq(ia[0], 0);
assertEq(Atomics.store(ia, 0, '4.6'), 4);
assertEq(ia[0], 4);
assertEq(Atomics.store(ia, 0, '-4.6'), -4);
assertEq(ia[0], -4);
assertEq(Atomics.store(ia, 0, undefined), 0);
assertEq(ia[0], 0);
assertEq(Atomics.store(ia, 0, Infinity), Infinity);
assertEq(ia[0], 0);
assertEq(Atomics.store(ia, 0, -Infinity), -Infinity);
assertEq(ia[0], 0);
assertEq(Atomics.store(ia, 0, Math.pow(2, 32)+5), Math.pow(2, 32)+5);
assertEq(ia[0], 5);
assertEq(Atomics.store(ia, 0, { valueOf: () => 3.7 }), 3);
assertEq(ia[0], 3);
}
for ( var i=0 ; i < 10 ; i++ )
f();