store-does-not-truncate-returnval.js

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function test(SharedOrUnsharedArrayBuffer) {

var ia = new Int32Array(new SharedOrUnsharedArrayBuffer(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();

test(SharedArrayBuffer);

test(ArrayBuffer);