1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/large-arraybuffers/atomics.js b/js/src/jit-test/tests/large-arraybuffers/atomics.js
new file mode 100644
index 0000000000..0e108db3b7
--- /dev/null
+++ b/js/src/jit-test/tests/large-arraybuffers/atomics.js
@@ -0,0 +1,57 @@
+// |jit-test| skip-if: !this.SharedArrayBuffer || !this.Atomics
+
+let gb = 1 * 1024 * 1024 * 1024;
+let buflen = 4 * gb + 64;
+let sab = new SharedArrayBuffer(buflen);
+assertEq(sab.byteLength, buflen);
+
+function testBasic(base) {
+    var uint8 = new Uint8Array(sab);
+    var uint8Part = new Uint8Array(sab, base, 64);
+
+    for (var i = 0; i < 50; i++) {
+        var index = base + i;
+        uint8Part[i] = 123;
+        assertEq(uint8[index], 123);
+
+        // Binary ops.
+        assertEq(Atomics.add(uint8, index, 1), 123);
+        assertEq(Atomics.and(uint8, index, 0xf), 124);
+        assertEq(Atomics.or(uint8, index, 0xf), 12);
+        assertEq(Atomics.xor(uint8, index, 0xee), 0xf);
+        assertEq(Atomics.sub(uint8, index, 100), 225);
+        assertEq(uint8Part[i], 125);
+
+        // compareExchange.
+        assertEq(Atomics.compareExchange(uint8, index, 125, 90), 125);
+        assertEq(Atomics.compareExchange(uint8, index, 125, 90), 90);
+        assertEq(uint8Part[i], 90);
+
+        // exchange.
+        assertEq(Atomics.exchange(uint8, index, 42), 90);
+        assertEq(uint8Part[i], 42);
+
+        // load/store.
+        assertEq(Atomics.load(uint8, index), 42);
+        assertEq(Atomics.store(uint8, index, 99), 99);
+        assertEq(uint8Part[i], 99);
+    }
+}
+for (let i = 0; i <= 4; i++) {
+    testBasic(i * gb);
+}
+
+function testWait() {
+    let int32 = new Int32Array(sab);
+    let index = int32.length - 1;
+    assertEq(int32[index], 0);
+    assertEq(Atomics.wait(int32, index, 1), "not-equal");
+    int32[index] = 12345;
+    assertEq(Atomics.wait(int32, index, 12345, 1), "timed-out");
+    assertEq(Atomics.notify(int32, index), 0);
+
+    let int32WithOffset = new Int32Array(sab, int32.byteLength - 4);
+    assertEq(int32WithOffset[0], 12345);
+    assertEq(Atomics.wait(int32WithOffset, 0, 12345, 1), "timed-out");
+}
+testWait();