Merge pull request #1689 from test262-automation/javascriptcore-test262-automation-export-ac84caea5

Import test changes from JavaScriptCore

implementation-contributed/curation_logs/javascriptcore.json

@@ -1,6 +1,6 @@
 {
-  "sourceRevisionAtLastExport": "ffc7368147",
-  "targetRevisionAtLastExport": "ac84caea5",
+  "sourceRevisionAtLastExport": "93457d631e",
+  "targetRevisionAtLastExport": "04c056b95",
   "curatedFiles": {
     "/stress/Number-isNaN-basics.js": "DELETED_IN_TARGET",
     "/stress/Object_static_methods_Object.getOwnPropertyDescriptors-proxy.js": "DELETED_IN_TARGET",

implementation-contributed/javascriptcore/stress/characters-regexp-ignore-case.js

@@ -0,0 +1,77 @@
+function shouldBe(actual, expected) {
+    if (actual !== expected)
+        throw new Error('bad value: ' + actual);
+}
+
+function testH(string) {
+    return string.match(/h/i);
+}
+noInline(testH);
+
+function testHe(string) {
+    return string.match(/he/i);
+}
+noInline(testHe);
+
+function testHel(string) {
+    return string.match(/hel/i);
+}
+noInline(testHel);
+
+function testHell(string) {
+    return string.match(/hell/i);
+}
+noInline(testHell);
+
+function testHello(string) {
+    return string.match(/hello/i);
+}
+noInline(testHello);
+
+function testHelloW(string) {
+    return string.match(/hellow/i);
+}
+noInline(testHelloW);
+
+function testHelloWo(string) {
+    return string.match(/hellowo/i);
+}
+noInline(testHelloWo);
+
+function testHelloWor(string) {
+    return string.match(/hellowor/i);
+}
+noInline(testHelloWor);
+
+function testHelloWorl(string) {
+    return string.match(/helloworl/i);
+}
+noInline(testHelloWorl);
+
+function testHelloWorld(string) {
+    return string.match(/helloworld/i);
+}
+noInline(testHelloWorld);
+
+for (var i = 0; i < 1e4; ++i) {
+    shouldBe(testH("HelloWorld")[0], `H`);
+    shouldBe(testHe("HelloWorld")[0], `He`);
+    shouldBe(testHel("HelloWorld")[0], `Hel`);
+    shouldBe(testHell("HelloWorld")[0], `Hell`);
+    shouldBe(testHello("HelloWorld")[0], `Hello`);
+    shouldBe(testHelloW("HelloWorld")[0], `HelloW`);
+    shouldBe(testHelloWo("HelloWorld")[0], `HelloWo`);
+    shouldBe(testHelloWor("HelloWorld")[0], `HelloWor`);
+    shouldBe(testHelloWorl("HelloWorld")[0], `HelloWorl`);
+    shouldBe(testHelloWorld("HelloWorld")[0], `HelloWorld`);
+    shouldBe(testH("HelloWorldこんにちは")[0], `H`);
+    shouldBe(testHe("HelloWorldこんにちは")[0], `He`);
+    shouldBe(testHel("HelloWorldこんにちは")[0], `Hel`);
+    shouldBe(testHell("HelloWorldこんにちは")[0], `Hell`);
+    shouldBe(testHello("HelloWorldこんにちは")[0], `Hello`);
+    shouldBe(testHelloW("HelloWorldこんにちは")[0], `HelloW`);
+    shouldBe(testHelloWo("HelloWorldこんにちは")[0], `HelloWo`);
+    shouldBe(testHelloWor("HelloWorldこんにちは")[0], `HelloWor`);
+    shouldBe(testHelloWorl("HelloWorldこんにちは")[0], `HelloWorl`);
+    shouldBe(testHelloWorld("HelloWorldこんにちは")[0], `HelloWorld`);
+}

implementation-contributed/javascriptcore/stress/characters-regexp.js

@@ -0,0 +1,77 @@
+function shouldBe(actual, expected) {
+    if (actual !== expected)
+        throw new Error('bad value: ' + actual);
+}
+
+function testH(string) {
+    return string.match(/H/);
+}
+noInline(testH);
+
+function testHe(string) {
+    return string.match(/He/);
+}
+noInline(testHe);
+
+function testHel(string) {
+    return string.match(/Hel/);
+}
+noInline(testHel);
+
+function testHell(string) {
+    return string.match(/Hell/);
+}
+noInline(testHell);
+
+function testHello(string) {
+    return string.match(/Hello/);
+}
+noInline(testHello);
+
+function testHelloW(string) {
+    return string.match(/HelloW/);
+}
+noInline(testHelloW);
+
+function testHelloWo(string) {
+    return string.match(/HelloWo/);
+}
+noInline(testHelloWo);
+
+function testHelloWor(string) {
+    return string.match(/HelloWor/);
+}
+noInline(testHelloWor);
+
+function testHelloWorl(string) {
+    return string.match(/HelloWorl/);
+}
+noInline(testHelloWorl);
+
+function testHelloWorld(string) {
+    return string.match(/HelloWorld/);
+}
+noInline(testHelloWorld);
+
+for (var i = 0; i < 1e4; ++i) {
+    shouldBe(testH("HelloWorld")[0], `H`);
+    shouldBe(testHe("HelloWorld")[0], `He`);
+    shouldBe(testHel("HelloWorld")[0], `Hel`);
+    shouldBe(testHell("HelloWorld")[0], `Hell`);
+    shouldBe(testHello("HelloWorld")[0], `Hello`);
+    shouldBe(testHelloW("HelloWorld")[0], `HelloW`);
+    shouldBe(testHelloWo("HelloWorld")[0], `HelloWo`);
+    shouldBe(testHelloWor("HelloWorld")[0], `HelloWor`);
+    shouldBe(testHelloWorl("HelloWorld")[0], `HelloWorl`);
+    shouldBe(testHelloWorld("HelloWorld")[0], `HelloWorld`);
+    shouldBe(testH("HelloWorldこんにちは")[0], `H`);
+    shouldBe(testHe("HelloWorldこんにちは")[0], `He`);
+    shouldBe(testHel("HelloWorldこんにちは")[0], `Hel`);
+    shouldBe(testHell("HelloWorldこんにちは")[0], `Hell`);
+    shouldBe(testHello("HelloWorldこんにちは")[0], `Hello`);
+    shouldBe(testHelloW("HelloWorldこんにちは")[0], `HelloW`);
+    shouldBe(testHelloWo("HelloWorldこんにちは")[0], `HelloWo`);
+    shouldBe(testHelloWor("HelloWorldこんにちは")[0], `HelloWor`);
+    shouldBe(testHelloWorl("HelloWorldこんにちは")[0], `HelloWorl`);
+    shouldBe(testHelloWorld("HelloWorldこんにちは")[0], `HelloWorld`);
+}

implementation-contributed/javascriptcore/stress/dataview-jit-bounds-checks.js

@@ -0,0 +1,114 @@
+"use strict";
+
+function assert(b, m = "") {
+    if (!b)
+        throw new Error("Bad: " + m);
+}
+
+let getOps = {
+    getUint8: 1,
+    getUint16: 2,
+    getUint32: 4,
+    getInt8: 1,
+    getInt16: 2,
+    getInt32: 4,
+    getFloat32: 4,
+    getFloat64: 8,
+};
+
+let setOps = {
+    setUint8: 1,
+    setUint16: 2,
+    setUint32: 4,
+    setInt8: 1,
+    setInt16: 2,
+    setInt32: 4,
+    setFloat32: 4,
+    setFloat64: 8,
+};
+
+let getFuncs = [];
+for (let p of Object.keys(getOps)) {
+    let endOfCall = getOps[p] === 1 ? ");" : ", true);";
+    let str = `
+        (function ${p}(dv, index) {
+            return dv.${p}(index${endOfCall}
+        })
+    `;
+       
+    let func = eval(str);
+    noInline(func);
+    getFuncs.push(func);
+}
+
+let setFuncs = [];
+for (let p of Object.keys(setOps)) {
+    let endOfCall = setOps[p] === 1 ? ");" : ", true);";
+    let str = `
+        (function ${p}(dv, index, value) {
+            return dv.${p}(index, value${endOfCall}
+        })
+    `;
+
+    let func = eval(str);
+    noInline(func);
+    setFuncs.push(func);
+}
+
+function assertThrowsRangeError(f) {
+    let e = null;
+    try {
+        f();
+    } catch(err) {
+        e = err;
+    }
+    assert(e instanceof RangeError, e);
+}
+
+function test(warmup) {
+    const size = 16*1024;
+    let ab = new ArrayBuffer(size);
+    let dv = new DataView(ab);
+    for (let i = 0; i < warmup; ++i) {
+        for (let f of getFuncs) {
+            f(dv, 0);
+        }
+
+        for (let f of setFuncs) {
+            f(dv, 0, 10);
+        }
+    }
+
+    for (let f of getFuncs) {
+        assertThrowsRangeError(() => {
+            let index = size - getOps[f.name] + 1;
+            f(dv, index);
+        });
+        assertThrowsRangeError(() => {
+            let index = -1;
+            f(dv, index);
+        });
+        assertThrowsRangeError(() => {
+            let index = -2147483648;
+            f(dv, index);
+        });
+    } 
+
+    for (let f of setFuncs) {
+        assertThrowsRangeError(() => {
+            let index = size - setOps[f.name] + 1;
+            f(dv, index, 10);
+        });
+        assertThrowsRangeError(() => {
+            let index = -1;
+            f(dv, index, 10);
+        });
+        assertThrowsRangeError(() => {
+            let index = -2147483648;
+            f(dv, index, 10);
+        });
+    }
+}
+
+test(2000);
+test(10000);

implementation-contributed/javascriptcore/stress/dataview-jit-get.js

@@ -0,0 +1,305 @@
+"use strict";
+
+function assert(b) {
+    if (!b)
+        throw new Error("Bad!");
+}
+
+function test1() {
+    function bigEndian(o, i) {
+        return o.getInt32(i, false);
+    }
+    noInline(bigEndian);
+    function littleEndian(o, i) {
+        return o.getInt32(i, true);
+    }
+    noInline(littleEndian);
+    function biEndian(o, i, b) {
+        return o.getInt32(i, b);
+    }
+    noInline(biEndian);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Int32Array(ab);
+    ta[0] = 0x01020304;
+    let dv = new DataView(ab);
+
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === 0x04030201);
+        assert(littleEndian(dv, 0) === 0x01020304);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === 0x01020304);
+        else
+            assert(biEndian(dv, 0, false) === 0x04030201);
+    }
+
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === 0x04030201);
+        assert(littleEndian(dv, 0) === 0x01020304);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === 0x01020304);
+        else
+            assert(biEndian(dv, 0, false) === 0x04030201);
+    }
+
+    // Make sure we get the right sign.
+    ta[0] = -32361386; // 0xfe123456
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === 0x563412fe);
+        assert(littleEndian(dv, 0) === -32361386);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === -32361386);
+        else
+            assert(biEndian(dv, 0, false) === 0x563412fe);
+    }
+
+    // -2146290602 == (int)0x80123456
+    ta[0] = 0x56341280;
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === -2146290602);
+        assert(littleEndian(dv, 0) === 0x56341280);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === 0x56341280);
+        else
+            assert(biEndian(dv, 0, false) === -2146290602);
+    }
+}
+test1();
+
+function test2() {
+    function bigEndian(o, i) {
+        return o.getInt16(i, false);
+    }
+    noInline(bigEndian);
+    function littleEndian(o, i) {
+        return o.getInt16(i, true);
+    }
+    noInline(littleEndian);
+    function biEndian(o, i, b) {
+        return o.getInt16(i, b);
+    }
+    noInline(biEndian);
+
+    let ab = new ArrayBuffer(2);
+    let ta = new Int16Array(ab);
+    ta[0] = 0x0102;
+    let dv = new DataView(ab);
+
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === 0x0201);
+        assert(littleEndian(dv, 0) === 0x0102);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === 0x0102);
+        else
+            assert(biEndian(dv, 0, false) === 0x0201);
+    }
+
+    // Check sign.
+    ta[0] = -512; // 0xfe00
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === 0x00fe);
+        assert(littleEndian(dv, 0) === -512);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === -512);
+        else
+            assert(biEndian(dv, 0, false) === 0x00fe);
+    }
+
+    // Check sign extension.
+    ta[0] = 0x00fe;
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === -512);
+        assert(littleEndian(dv, 0) === 0x00fe);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === 0x00fe);
+        else
+            assert(biEndian(dv, 0, false) === -512);
+    }
+}
+test2();
+
+function test3() {
+    function bigEndian(o, i) {
+        return o.getFloat32(i, false);
+    }
+    noInline(bigEndian);
+    function littleEndian(o, i) {
+        return o.getFloat32(i, true);
+    }
+    noInline(littleEndian);
+    function biEndian(o, i, b) {
+        return o.getFloat32(i, b);
+    }
+    noInline(biEndian);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Float32Array(ab);
+    const normal = 12912.403; // 0x4649c19d
+    const normalAsDouble = 12912.403320312500;
+
+    const flipped = -5.1162437589918884e-21;
+    ta[0] = normal;
+
+    let dv = new DataView(ab);
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === flipped);
+        assert(littleEndian(dv, 0) === 12912.403320312500);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === normalAsDouble);
+        else
+            assert(biEndian(dv, 0, false) === flipped);
+    }
+}
+test3();
+
+function test4() {
+    function bigEndian(o, i) {
+        return o.getUint32(i, false);
+    }
+    noInline(bigEndian);
+    function littleEndian(o, i) {
+        return o.getUint32(i, true);
+    }
+    noInline(littleEndian);
+    function biEndian(o, i, b) {
+        return o.getUint32(i, b);
+    }
+    noInline(biEndian);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Uint32Array(ab);
+    ta[0] = 0xa0b0d0f0;
+
+    let dv = new DataView(ab);
+    for (let i = 0; i < 10000; ++i) {
+        assert(bigEndian(dv, 0) === 0xf0d0b0a0);
+        assert(littleEndian(dv, 0) === 0xa0b0d0f0);
+        if (i % 2)
+            assert(biEndian(dv, 0, true) === 0xa0b0d0f0);
+        else
+            assert(biEndian(dv, 0, false) === 0xf0d0b0a0);
+    }
+}
+test4();
+
+function test5() {
+    function bigEndian(o, i) {
+        return o.getUint16(i, false);
+    }
+    noInline(bigEndian);
+    function littleEndian(o, i) {
+        return o.getUint16(i, true);
+    }
+    noInline(littleEndian);
+    function biEndian(o, i, b) {
+        return o.getUint16(i, b);
+    }
+    noInline(biEndian);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Uint32Array(ab);
+    ta[0] = 0xa0b0d0f0;
+
+    let dv = new DataView(ab);
+    for (let i = 0; i < 10000; ++i) {
+        assert(littleEndian(dv, 0) == 0xd0f0);
+        assert(bigEndian(dv, 0) == 0xf0d0);
+
+        assert(littleEndian(dv, 1) == 0xb0d0);
+        assert(bigEndian(dv, 1) == 0xd0b0);
+
+        assert(littleEndian(dv, 2) == 0xa0b0);
+        assert(bigEndian(dv, 2) == 0xb0a0);
+
+        assert(biEndian(dv, 0, true) == 0xd0f0);
+        assert(biEndian(dv, 0, false) == 0xf0d0);
+
+        assert(biEndian(dv, 1, true) == 0xb0d0);
+        assert(biEndian(dv, 1, false) == 0xd0b0);
+
+        assert(biEndian(dv, 2, true) == 0xa0b0);
+        assert(biEndian(dv, 2, false) == 0xb0a0);
+    }
+}
+test5();
+
+function test6() {
+    function bigEndian(o, i) {
+        return o.getInt16(i, false);
+    }
+    noInline(bigEndian);
+    function littleEndian(o, i) {
+        return o.getInt16(i, true);
+    }
+    noInline(littleEndian);
+    function biEndian(o, i, b) {
+        return o.getInt16(i, b);
+    }
+    noInline(biEndian);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Uint32Array(ab);
+    ta[0] = 0xa070fa01;
+
+    let dv = new DataView(ab);
+    for (let i = 0; i < 10000; ++i) {
+        assert(littleEndian(dv, 0) == -1535);
+        assert(bigEndian(dv, 0) == 0x01fa);
+
+        assert(littleEndian(dv, 1) == 0x70fa);
+        assert(bigEndian(dv, 1) == -1424);
+
+        assert(littleEndian(dv, 2) == -24464);
+        assert(bigEndian(dv, 2) == 0x70a0);
+
+        assert(biEndian(dv, 0, true) == -1535);
+        assert(biEndian(dv, 0, false) == 0x01fa);
+
+        assert(biEndian(dv, 1, true) == 0x70fa);
+        assert(biEndian(dv, 1, false) == -1424);
+
+        assert(biEndian(dv, 2, true) == -24464);
+        assert(biEndian(dv, 2, false) == 0x70a0);
+    }
+}
+test6();
+
+function test7() {
+    function load(o, i) {
+        return o.getInt8(i);
+    }
+    noInline(load);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Uint32Array(ab);
+    ta[0] = 0xa070fa01;
+
+    let dv = new DataView(ab);
+    for (let i = 0; i < 10000; ++i) {
+        assert(load(dv, 0) === 0x01);
+        assert(load(dv, 1) === -6);
+        assert(load(dv, 2) === 0x70);
+        assert(load(dv, 3) === -96);
+    }
+}
+test7();
+
+function test8() {
+    function load(o, i) {
+        return o.getUint8(i);
+    }
+    noInline(load);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Uint32Array(ab);
+    ta[0] = 0xa070fa01;
+
+    let dv = new DataView(ab);
+    for (let i = 0; i < 10000; ++i) {
+        assert(load(dv, 0) === 0x01);
+        assert(load(dv, 1) === 0xfa);
+        assert(load(dv, 2) === 0x70);
+        assert(load(dv, 3) === 0xa0)
+    }
+}
+test8();

implementation-contributed/javascriptcore/stress/dataview-jit-neuter.js

@@ -0,0 +1,59 @@
+"use strict";
+
+function assert(b) {
+    if (!b)
+        throw new Error("Bad!");
+}
+
+function test() {
+    function load(o, i) {
+        return o.getUint8(i);
+    }
+    noInline(load);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Uint32Array(ab);
+    ta[0] = 0xa070fa01;
+    let dv = new DataView(ab);
+
+    for (let i = 0; i < 1000; ++i) {
+        assert(load(dv, 0) === 0x01);
+    }
+
+    transferArrayBuffer(ab);
+    let e = null;
+    try {
+        load(dv, 0);
+    } catch(err) {
+        e = err;
+    }
+    assert(e instanceof RangeError);
+}
+test();
+
+
+function test2() {
+    function load(o, i) {
+        return o.getUint8(i);
+    }
+    noInline(load);
+
+    let ab = new ArrayBuffer(4);
+    let ta = new Uint32Array(ab);
+    ta[0] = 0xa070fa01;
+    let dv = new DataView(ab);
+
+    for (let i = 0; i < 10000; ++i) {
+        assert(load(dv, 0) === 0x01);
+    }
+
+    transferArrayBuffer(ab);
+    let e = null;
+    try {
+        load(dv, 0);
+    } catch(err) {
+        e = err;
+    }
+    assert(e instanceof RangeError);
+}
+test2();

implementation-contributed/javascriptcore/stress/dataview-jit-set.js

@@ -0,0 +1,440 @@
+"use strict";
+
+function assert(b) {
+    if (!b)
+        throw new Error;
+}
+
+function readHex(dv, bytes) {
+    function isLittleEndian() { 
+        let b = new ArrayBuffer(4);
+        let dv = new DataView(b);
+        dv.setInt32(0, 0x00112233, true);
+        return dv.getUint8(0) === 0x33;
+    }
+    let str = "";
+    function readByte(i) {
+        let b = dv.getUint8(i).toString(16);
+        if (b.length === 1)
+            b = "0" + b;
+        else
+            assert(b.length === 2)
+        return b;
+    }
+    if (isLittleEndian()) {
+        for (let i = bytes; i--;)
+            str = str + readByte(i);
+    } else {
+        for (let i = 0; i < bytes; ++i)
+            str = str + readByte(i);
+    }
+
+    return "0x" + str;
+}
+
+{
+    let b = new ArrayBuffer(4);
+    let dv = new DataView(b);
+    dv.setInt32(0, 0x00112233, true);
+    assert(readHex(dv, 4) === "0x00112233");
+}
+
+function test() {
+    function storeLittleEndian(dv, index, value) {
+        dv.setInt16(index, value, true);
+    }
+    noInline(storeLittleEndian);
+
+    function storeBigEndian(dv, index, value) {
+        dv.setInt16(index, value, false);
+    }
+    noInline(storeBigEndian);
+
+    function store(dv, index, value, littleEndian) {
+        dv.setInt16(index, value, littleEndian);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(2);
+    let arr = new Uint16Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        storeLittleEndian(dv, 0, 0xfaba);
+        assert(arr[0] === 0xfaba);
+
+        store(dv, 0, 0xabcd, true);
+        assert(arr[0] === 0xabcd);
+
+        store(dv, 0, 0xbadbeef, true);
+        assert(arr[0] === 0xbeef);
+
+        storeLittleEndian(dv, 0, 0xbb4db33f, true);
+        assert(arr[0] === 0xb33f);
+
+        storeBigEndian(dv, 0, 0xfada);
+        assert(arr[0] === 0xdafa);
+
+        storeBigEndian(dv, 0, 0x12ab);
+        assert(arr[0] === 0xab12);
+
+        store(dv, 0, 0x1234, false);
+        assert(arr[0] === 0x3412);
+
+        store(dv, 0, 0x0102, false);
+        assert(arr[0] === 0x0201);
+
+        store(dv, 0, -1, false);
+        assert(arr[0] === 0xffff);
+
+        store(dv, 0, -2, false);
+        assert(arr[0] === 0xfeff);
+
+        storeBigEndian(dv, 0, -1);
+        assert(arr[0] === 0xffff);
+
+        storeBigEndian(dv, 0, -2);
+        assert(arr[0] === 0xfeff);
+
+        storeBigEndian(dv, 0, -2147483648); 
+        assert(arr[0] === 0x0000);
+
+        storeLittleEndian(dv, 0, -2147483648); 
+        assert(arr[0] === 0x0000);
+
+        storeLittleEndian(dv, 0, -2147478988); 
+        assert(arr[0] === 0x1234);
+
+        storeBigEndian(dv, 0, -2147478988); 
+        assert(arr[0] === 0x3412);
+    }
+}
+test();
+
+function test2() {
+    function storeLittleEndian(dv, index, value) {
+        dv.setUint16(index, value, true);
+    }
+    noInline(storeLittleEndian);
+
+    function storeBigEndian(dv, index, value) {
+        dv.setUint16(index, value, false);
+    }
+    noInline(storeBigEndian);
+
+    function store(dv, index, value, littleEndian) {
+        dv.setUint16(index, value, littleEndian);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(2);
+    let arr = new Uint16Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        storeLittleEndian(dv, 0, 0xfaba);
+        assert(arr[0] === 0xfaba);
+
+        store(dv, 0, 0xabcd, true);
+        assert(arr[0] === 0xabcd);
+
+        store(dv, 0, 0xbadbeef, true);
+        assert(arr[0] === 0xbeef);
+
+        storeLittleEndian(dv, 0, 0xbb4db33f, true);
+        assert(arr[0] === 0xb33f);
+
+        storeBigEndian(dv, 0, 0xfada);
+        assert(arr[0] === 0xdafa);
+
+        storeBigEndian(dv, 0, 0x12ab);
+        assert(arr[0] === 0xab12);
+
+        store(dv, 0, 0x1234, false);
+        assert(arr[0] === 0x3412);
+
+        store(dv, 0, 0x0102, false);
+        assert(arr[0] === 0x0201);
+
+        store(dv, 0, -1, false);
+        assert(arr[0] === 0xffff);
+
+        store(dv, 0, -2, false);
+        assert(arr[0] === 0xfeff);
+
+        storeBigEndian(dv, 0, -1);
+        assert(arr[0] === 0xffff);
+
+        storeBigEndian(dv, 0, -2);
+        assert(arr[0] === 0xfeff);
+
+        storeBigEndian(dv, 0, -2147483648); 
+        assert(arr[0] === 0x0000);
+
+        storeLittleEndian(dv, 0, -2147483648); 
+        assert(arr[0] === 0x0000);
+
+        storeLittleEndian(dv, 0, -2147478988); 
+        assert(arr[0] === 0x1234);
+
+        storeBigEndian(dv, 0, -2147478988); 
+        assert(arr[0] === 0x3412);
+    }
+}
+test2();
+
+function test3() {
+    function storeLittleEndian(dv, index, value) {
+        dv.setUint32(index, value, true);
+    }
+    noInline(storeLittleEndian);
+
+    function storeBigEndian(dv, index, value) {
+        dv.setUint32(index, value, false);
+    }
+    noInline(storeBigEndian);
+
+    function store(dv, index, value, littleEndian) {
+        dv.setUint32(index, value, littleEndian);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(4);
+    let arr = new Uint32Array(buffer);
+    let arr2 = new Int32Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        storeLittleEndian(dv, 0, 0xffffffff);
+        assert(arr[0] === 0xffffffff);
+        assert(arr2[0] === -1);
+
+        storeLittleEndian(dv, 0, 0xffaabbcc);
+        assert(arr[0] === 0xffaabbcc);
+
+        storeBigEndian(dv, 0, 0x12345678);
+        assert(arr[0] === 0x78563412);
+
+        storeBigEndian(dv, 0, 0xffaabbcc);
+        assert(arr[0] === 0xccbbaaff);
+
+        store(dv, 0, 0xfaeadaca, false);
+        assert(arr[0] === 0xcadaeafa);
+
+        store(dv, 0, 0xcadaeafa, false);
+        assert(arr2[0] === -85271862);
+
+        store(dv, 0, 0x12345678, false);
+        assert(arr[0] === 0x78563412);
+
+        storeBigEndian(dv, 0, 0xbeeffeeb);
+        assert(arr2[0] === -335614018);
+    }
+}
+test3();
+
+function test4() {
+    function storeLittleEndian(dv, index, value) {
+        dv.setInt32(index, value, true);
+    }
+    noInline(storeLittleEndian);
+
+    function storeBigEndian(dv, index, value) {
+        dv.setInt32(index, value, false);
+    }
+    noInline(storeBigEndian);
+
+    function store(dv, index, value, littleEndian) {
+        dv.setInt32(index, value, littleEndian);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(4);
+    let arr = new Uint32Array(buffer);
+    let arr2 = new Int32Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        storeLittleEndian(dv, 0, 0xffffffff);
+        assert(arr[0] === 0xffffffff);
+        assert(arr2[0] === -1);
+
+        storeLittleEndian(dv, 0, 0xffaabbcc);
+        assert(arr[0] === 0xffaabbcc);
+
+        storeBigEndian(dv, 0, 0x12345678);
+        assert(arr[0] === 0x78563412);
+
+        storeBigEndian(dv, 0, 0xffaabbcc);
+        assert(arr[0] === 0xccbbaaff);
+
+        store(dv, 0, 0xfaeadaca, false);
+        assert(arr[0] === 0xcadaeafa);
+
+        store(dv, 0, 0xcadaeafa, false);
+        assert(arr2[0] === -85271862);
+
+        store(dv, 0, 0x12345678, false);
+        assert(arr[0] === 0x78563412);
+
+        storeBigEndian(dv, 0, 0xbeeffeeb);
+        assert(arr2[0] === -335614018);
+    }
+}
+test4();
+
+function test5() {
+    function storeLittleEndian(dv, index, value) {
+        dv.setFloat32(index, value, true);
+    }
+    noInline(storeLittleEndian);
+
+    function storeBigEndian(dv, index, value) {
+        dv.setFloat32(index, value, false);
+    }
+    noInline(storeBigEndian);
+
+    function store(dv, index, value, littleEndian) {
+        dv.setFloat32(index, value, littleEndian);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(4);
+    let arr = new Float32Array(buffer);
+    let bits = new Uint32Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        storeLittleEndian(dv, 0, 1.5);
+        assert(arr[0] === 1.5);
+
+        storeLittleEndian(dv, 0, 12912.124123215122);
+        assert(arr[0] === 12912.1240234375);
+        assert(bits[0] === 0x4649c07f);
+
+        storeLittleEndian(dv, 0, NaN);
+        assert(isNaN(arr[0]));
+        assert(bits[0] === 0x7FC00000);
+
+        storeLittleEndian(dv, 0, 2.3879393e-38);
+        assert(arr[0] === 2.387939260590663e-38);
+        assert(bits[0] === 0x01020304);
+
+        storeBigEndian(dv, 0, 2.3879393e-38);
+        assert(arr[0] === 1.539989614439558e-36);
+        assert(bits[0] === 0x04030201);
+    }
+}
+test5();
+
+function test6() {
+    function storeLittleEndian(dv, index, value) {
+        dv.setFloat64(index, value, true);
+    }
+    noInline(storeLittleEndian);
+
+    function storeBigEndian(dv, index, value) {
+        dv.setFloat64(index, value, false);
+    }
+    noInline(storeBigEndian);
+
+    function store(dv, index, value, littleEndian) {
+        dv.setFloat64(index, value, littleEndian);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(8);
+    let arr = new Float64Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        storeLittleEndian(dv, 0, NaN);
+        assert(isNaN(arr[0]));
+
+        storeLittleEndian(dv, 0, -2.5075187084135162e+284);
+        assert(arr[0] === -2.5075187084135162e+284);
+        assert(readHex(dv, 8) === "0xfafafafafafafafa");
+
+        store(dv, 0, 124.553, true);
+        assert(readHex(dv, 8) === "0x405f23645a1cac08");
+
+        store(dv, 0, Infinity, true);
+        assert(readHex(dv, 8) === "0x7ff0000000000000");
+
+        store(dv, 0, Infinity, false);
+        assert(readHex(dv, 8) === "0x000000000000f07f");
+
+        store(dv, 0, -Infinity, true);
+        assert(readHex(dv, 8) === "0xfff0000000000000");
+
+        storeBigEndian(dv, 0, -2.5075187084135162e+284);
+        assert(arr[0] === -2.5075187084135162e+284);
+        assert(readHex(dv, 8) === "0xfafafafafafafafa");
+
+        storeBigEndian(dv, 0, 124.553);
+        assert(readHex(dv, 8) === "0x08ac1c5a64235f40");
+    }
+}
+test6();
+
+function test7() {
+    function store(dv, index, value) {
+        dv.setInt8(index, value);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(1);
+    let arr = new Uint8Array(buffer);
+    let arr2 = new Int8Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        store(dv, 0, 0xff);
+        assert(arr[0] === 0xff);
+        assert(arr2[0] === -1);
+
+        store(dv, 0, 0xff00);
+        assert(arr[0] === 0);
+        assert(arr2[0] === 0);
+
+        store(dv, 0, -1);
+        assert(arr[0] === 0xff);
+        assert(arr2[0] === -1);
+
+        store(dv, 0, 0x0badbeef);
+        assert(arr[0] === 0xef);
+        assert(arr2[0] === -17);
+    }
+}
+test7();
+
+function test8() {
+    function store(dv, index, value) {
+        dv.setInt8(index, value);
+    }
+    noInline(store);
+
+    let buffer = new ArrayBuffer(1);
+    let arr = new Uint8Array(buffer);
+    let arr2 = new Int8Array(buffer);
+    let dv = new DataView(buffer);
+
+    for (let i = 0; i < 10000; ++i) {
+        store(dv, 0, 0xff);
+        assert(arr[0] === 0xff);
+        assert(arr2[0] === -1);
+
+        store(dv, 0, 0xff00);
+        assert(arr[0] === 0);
+        assert(arr2[0] === 0);
+
+        store(dv, 0, -1);
+        assert(arr[0] === 0xff);
+        assert(arr2[0] === -1);
+
+        store(dv, 0, 0x0badbeef);
+        assert(arr[0] === 0xef);
+        assert(arr2[0] === -17);
+    }
+}
+test8();

implementation-contributed/javascriptcore/stress/dataview-jit-unaligned-accesses.js

@@ -0,0 +1,75 @@
+"use strict";
+
+function assert(b, m = "") {
+    if (!b)
+        throw new Error("Bad: " + m);
+}
+
+let getOps = {
+    getUint8: 1,
+    getUint16: 2,
+    getUint32: 4,
+    getInt8: 1,
+    getInt16: 2,
+    getInt32: 4,
+    getFloat32: 4,
+    getFloat64: 8,
+};
+
+let setOps = {
+    setUint8: 1,
+    setUint16: 2,
+    setUint32: 4,
+    setInt8: 1,
+    setInt16: 2,
+    setInt32: 4,
+    setFloat32: 4,
+    setFloat64: 8,
+};
+
+let getFuncs = [];
+for (let p of Object.keys(getOps)) {
+    let endOfCall = getOps[p] === 1 ? ");" : ", true);";
+    let str = `
+        (function ${p}(dv, index) {
+            return dv.${p}(index${endOfCall}
+        })
+    `;
+       
+    let func = eval(str);
+    noInline(func);
+    getFuncs.push(func);
+}
+
+let setFuncs = [];
+for (let p of Object.keys(setOps)) {
+    let endOfCall = setOps[p] === 1 ? ");" : ", true);";
+    let str = `
+        (function ${p}(dv, index, value) {
+            dv.${p}(index, value${endOfCall}
+        })
+    `;
+
+    let func = eval(str);
+    noInline(func);
+    setFuncs.push(func);
+}
+
+function test() {
+    const size = 16*1024;
+    let ab = new ArrayBuffer(size);
+    let dv = new DataView(ab);
+    for (let i = 0; i < 100000; ++i) {
+        let index = (Math.random() * size) >>> 0;
+        index = Math.max(index - 8, 0);
+        for (let f of getFuncs) {
+            f(dv, index);
+        }
+
+        for (let f of setFuncs) {
+            f(dv, index, 10);
+        }
+    }
+
+}
+test();