Expose SIMD.Float32x4 type to Javascript.

test/mjsunit/harmony/simd.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-simd --harmony-tostring  --harmony-reflect
+// Flags: --allow-natives-syntax --expose-natives-as natives --noalways-opt
+
+function lanesForType(typeName) {
+  // The lane count follows the first 'x' in the type name, which begins with
+  // 'float', 'int', or 'bool'.
+  return Number.parseInt(typeName[typeName.indexOf('x') + 1]);
+}
+
+
+function isValidSimdString(string, value, type, lanes) {
+  var simdFn = SIMD[type],
+      parseFn =
+          type.indexOf('float') === 0 ? Number.parseFloat : Number.parseInt,
+      indexOfOpenParen = string.indexOf('(');
+  // Check prefix for correct type name.
+  if (string.substr(0, indexOfOpenParen).toUpperCase() !== type.toUpperCase())
+    return false;
+  // Remove type name and open parenthesis.
+  string = string.substr(indexOfOpenParen + 1);
+  var laneStrings = string.split(',');
+  if (laneStrings.length !== lanes)
+    return false;
+  for (var i = 0; i < lanes; i++) {
+    var fromString = parseFn(laneStrings[i]),
+        fromValue = simdFn.extractLane(value, i);
+    if (Math.abs(fromString - fromValue) > Number.EPSILON)
+      return false;
+  }
+  return true;
+}
+
+
+// Test for structural equivalence.
+function areEquivalent(type, lanes, a, b) {
+  var simdFn = SIMD[type];
+  for (var i = 0; i < lanes; i++) {
+    if (simdFn.extractLane(a, i) !== simdFn.extractLane(b, i))
+      return false;
+  }
+  return true;
+}
+
+
+var sameValue = natives.$sameValue;
+var sameValueZero = natives.$sameValueZero;
+
+// Calls SameValue and SameValueZero and checks that their results match. Also
+// checks the internal SameValue checks using Object freeze and defineProperty.
+function sameValueBoth(a, b) {
+  var result = sameValue(a, b);
+  assertTrue(result === sameValueZero(a, b));
+  return result;
+}
+
+
+// Calls SameValue and SameValueZero and checks that their results don't match.
+function sameValueZeroOnly(a, b) {
+  var result = sameValueZero(a, b);
+  assertTrue(result && !sameValue(a, b));
+  return result;
+}
+
+
+// Tests for the global SIMD object.
+function TestSIMDObject() {
+  assertSame(typeof SIMD, 'object');
+  assertSame(SIMD.constructor, Object);
+  assertSame(Object.getPrototypeOf(SIMD), Object.prototype);
+  assertSame(SIMD + "", "[object SIMD]");
+}
+TestSIMDObject()
+
+// TestConstructor populates this with interesting values for the other tests.
+var values;
+
+// Test different forms of constructor calls. This test populates 'values' with
+// a variety of SIMD values as a side effect, which are used by other tests.
+function TestConstructor(type, lanes) {
+  var simdFn = SIMD[type];
+  assertFalse(Object === simdFn.prototype.constructor)
+  assertFalse(simdFn === Object.prototype.constructor)
+  assertSame(simdFn, simdFn.prototype.constructor)
+
+  values = []
+
+  // The constructor expects values for all lanes.
+  switch (type) {
+    case 'float32x4':
+      // The constructor expects values for all lanes.
+      assertThrows(function () { simdFn() }, TypeError)
+      assertThrows(function () { simdFn(0) }, TypeError)
+      assertThrows(function () { simdFn(0, 1) }, TypeError)
+      assertThrows(function () { simdFn(0, 1, 2) }, TypeError)
+
+      values.push(simdFn(1, 2, 3, 4))
+      values.push(simdFn(1, 2, 3, 4))       // test structural equivalence
+      values.push(simdFn(-0, NaN, 0, 0.5))
+      values.push(simdFn(-0, NaN, 0, 0.5))  // test structural equivalence
+      values.push(simdFn(3, 2, 1, 0))
+      values.push(simdFn(0, 0, 0, 0))
+      break
+  }
+  for (var i in values) {
+    assertSame(simdFn, values[i].__proto__.constructor)
+    assertSame(simdFn, Object(values[i]).__proto__.constructor)
+    assertSame(simdFn.prototype, values[i].__proto__)
+    assertSame(simdFn.prototype, Object(values[i]).__proto__)
+  }
+}
+
+
+function TestType(type, lanes) {
+  for (var i in values) {
+    assertEquals(type, typeof values[i])
+    assertTrue(typeof values[i] === type)
+    assertTrue(typeof Object(values[i]) === 'object')
+    assertEquals(null, %_ClassOf(values[i]))
+    assertEquals("Float32x4", %_ClassOf(Object(values[i])))
+  }
+}
+
+
+function TestPrototype(type, lanes) {
+  var simdFn = SIMD[type];
+  assertSame(Object.prototype, simdFn.prototype.__proto__)
+  for (var i in values) {
+    assertSame(simdFn.prototype, values[i].__proto__)
+    assertSame(simdFn.prototype, Object(values[i]).__proto__)
+  }
+}
+
+
+function TestValueOf(type, lanes) {
+  var simdFn = SIMD[type];
+  for (var i in values) {
+    assertTrue(values[i] === Object(values[i]).valueOf())
+    assertTrue(values[i] === values[i].valueOf())
+    assertTrue(simdFn.prototype.valueOf.call(Object(values[i])) === values[i])
+    assertTrue(simdFn.prototype.valueOf.call(values[i]) === values[i])
+  }
+}
+
+
+function TestGet(type, lanes) {
+  var simdFn = SIMD[type];
+  for (var i in values) {
+    assertEquals(undefined, values[i].a)
+    assertEquals(undefined, values[i]["a" + "b"])
+    assertEquals(undefined, values[i]["" + "1"])
+    assertEquals(undefined, values[i][42])
+  }
+}
+
+
+function TestToBoolean(type, lanes) {
+  for (var i in values) {
+    assertTrue(Boolean(Object(values[i])))
+    assertFalse(!Object(values[i]))
+    assertTrue(Boolean(values[i]).valueOf())
+    assertFalse(!values[i])
+    assertTrue(!!values[i])
+    assertTrue(values[i] && true)
+    assertFalse(!values[i] && false)
+    assertTrue(!values[i] || true)
+    assertEquals(1, values[i] ? 1 : 2)
+    assertEquals(2, !values[i] ? 1 : 2)
+    if (!values[i]) assertUnreachable();
+    if (values[i]) {} else assertUnreachable();
+  }
+}
+
+
+function TestToString(type, lanes) {
+  var simdFn = SIMD[type];
+  for (var i in values) {
+    assertEquals(values[i].toString(), String(values[i]))
+    assertTrue(isValidSimdString(values[i].toString(), values[i], type, lanes))
+    assertTrue(
+        isValidSimdString(Object(values[i]).toString(), values[i], type, lanes))
+    assertTrue(isValidSimdString(
+        simdFn.prototype.toString.call(values[i]), values[i], type, lanes))
+  }
+}
+
+
+function TestToNumber(type, lanes) {
+  for (var i in values) {
+    assertThrows(function() { Number(Object(values[i])) }, TypeError)
+    assertThrows(function() { +Object(values[i]) }, TypeError)
+    assertThrows(function() { Number(values[i]) }, TypeError)
+    assertThrows(function() { values[i] + 0 }, TypeError)
+  }
+}
+
+
+function TestEquality(type, lanes) {
+  // Every SIMD value should equal itself, and non-strictly equal its wrapper.
+  for (var i in values) {
+    assertSame(values[i], values[i])
+    assertEquals(values[i], values[i])
+    assertTrue(Object.is(values[i], values[i]))
+    assertTrue(values[i] === values[i])
+    assertTrue(values[i] == values[i])
+    assertFalse(values[i] === Object(values[i]))
+    assertFalse(Object(values[i]) === values[i])
+    assertFalse(values[i] == Object(values[i]))
+    assertFalse(Object(values[i]) == values[i])
+    assertTrue(values[i] === values[i].valueOf())
+    assertTrue(values[i].valueOf() === values[i])
+    assertTrue(values[i] == values[i].valueOf())
+    assertTrue(values[i].valueOf() == values[i])
+    assertFalse(Object(values[i]) === Object(values[i]))
+    assertEquals(Object(values[i]).valueOf(), Object(values[i]).valueOf())
+  }
+
+  // Test structural equivalence.
+  for (var i = 0; i < values.length; i++) {
+    for (var j = i + 1; j < values.length; j++) {
+      var a = values[i], b = values[j],
+          equivalent = areEquivalent(type, lanes, a, b);
+      assertSame(equivalent, a == b);
+      assertSame(equivalent, a === b);
+    }
+  }
+
+  // SIMD values should not be equal to any other kind of object.
+  var others = [347, 1.275, NaN, "string", null, undefined, {}, function() {}]
+  for (var i in values) {
+    for (var j in others) {
+      assertFalse(values[i] === others[j])
+      assertFalse(others[j] === values[i])
+      assertFalse(values[i] == others[j])
+      assertFalse(others[j] == values[i])
+    }
+  }
+}
+
+
+function TestSameValue(type, lanes) {
+  // SIMD value types.
+  // All lanes checked.
+  // TODO(bbudge): use loops to test lanes when replaceLane is defined.
+  assertTrue(sameValueBoth(SIMD.float32x4(1, 2, 3, 4),
+                           SIMD.float32x4(1, 2, 3, 4)));
+  assertFalse(sameValueBoth(SIMD.float32x4(1, 2, 3, 4),
+                            SIMD.float32x4(NaN, 2, 3, 4)));
+  assertFalse(sameValueBoth(SIMD.float32x4(1, 2, 3, 4),
+                            SIMD.float32x4(1, NaN, 3, 4)));
+  assertFalse(sameValueBoth(SIMD.float32x4(1, 2, 3, 4),
+                            SIMD.float32x4(1, 2, NaN, 4)));
+  assertFalse(sameValueBoth(SIMD.float32x4(1, 2, 3, 4),
+                            SIMD.float32x4(1, 2, 3, NaN)));
+  // Special values.
+  // TODO(bbudge): use loops to test lanes when replaceLane is defined.
+  assertTrue(sameValueBoth(SIMD.float32x4(NaN, 2, 3, 4),
+                           SIMD.float32x4(NaN, 2, 3, 4)));
+  assertTrue(sameValueBoth(SIMD.float32x4(+0, 2, 3, 4),
+                           SIMD.float32x4(+0, 2, 3, 4)));
+  assertTrue(sameValueBoth(SIMD.float32x4(-0, 2, 3, 4),
+                           SIMD.float32x4(-0, 2, 3, 4)));
+  assertTrue(sameValueZeroOnly(SIMD.float32x4(+0, 2, 3, 4),
+                               SIMD.float32x4(-0, 2, 3, 4)));
+  assertTrue(sameValueZeroOnly(SIMD.float32x4(-0, 2, 3, 4),
+                               SIMD.float32x4(+0, 2, 3, 4)));
+}
+
+
+function TestComparison(type, lanes) {
+  var a = values[0], b = values[1];
+
+  function lt() { a < b; }
+  function gt() { a > b; }
+  function le() { a <= b; }
+  function ge() { a >= b; }
+  function lt_same() { a < a; }
+  function gt_same() { a > a; }
+  function le_same() { a <= a; }
+  function ge_same() { a >= a; }
+
+  var throwFuncs = [lt, gt, le, ge, lt_same, gt_same, le_same, ge_same];
+
+  for (var f of throwFuncs) {
+    assertThrows(f, TypeError);
+    %OptimizeFunctionOnNextCall(f);
+    assertThrows(f, TypeError);
+    assertThrows(f, TypeError);
+  }
+}
+
+
+// Test SIMD value wrapping/boxing over non-builtins.
+function TestCall(type, lanes) {
+  var simdFn = SIMD[type];
+  simdFn.prototype.getThisProto = function () {
+    return Object.getPrototypeOf(this);
+  }
+  for (var i in values) {
+    assertTrue(values[i].getThisProto() === simdFn.prototype)
+  }
+}
+
+
+function TestAsSetKey(type, lanes, set) {
+  function test(set, key) {
+    assertFalse(set.has(key));
+    assertFalse(set.delete(key));
+    if (!(set instanceof WeakSet)) {
+      assertSame(set, set.add(key));
+      assertTrue(set.has(key));
+      assertTrue(set.delete(key));
+    } else {
+      // SIMD values can't be used as keys in WeakSets.
+      assertThrows(function() { set.add(key) });
+    }
+    assertFalse(set.has(key));
+    assertFalse(set.delete(key));
+    assertFalse(set.has(key));
+  }
+
+  for (var i in values) {
+    test(set, values[i]);
+  }
+}
+
+
+function TestAsMapKey(type, lanes, map) {
+  function test(map, key, value) {
+    assertFalse(map.has(key));
+    assertSame(undefined, map.get(key));
+    assertFalse(map.delete(key));
+    if (!(map instanceof WeakMap)) {
+      assertSame(map, map.set(key, value));
+      assertSame(value, map.get(key));
+      assertTrue(map.has(key));
+      assertTrue(map.delete(key));
+    } else {
+      // SIMD values can't be used as keys in WeakMaps.
+      assertThrows(function() { map.set(key, value) });
+    }
+    assertFalse(map.has(key));
+    assertSame(undefined, map.get(key));
+    assertFalse(map.delete(key));
+    assertFalse(map.has(key));
+    assertSame(undefined, map.get(key));
+  }
+
+  for (var i in values) {
+    test(map, values[i], {});
+  }
+}
+
+
+// Test SIMD type with Harmony reflect-apply.
+function TestReflectApply(type) {
+  function returnThis() { return this; }
+  function returnThisStrict() { 'use strict'; return this; }
+  function noop() {}
+  function noopStrict() { 'use strict'; }
+  var R = void 0;
+
+  for (var i in values) {
+    assertSame(SIMD[type].prototype,
+               Object.getPrototypeOf(
+                  Reflect.apply(returnThis, values[i], [])));
+    assertSame(values[i], Reflect.apply(returnThisStrict, values[i], []));
+
+    assertThrows(
+        function() { 'use strict'; Reflect.apply(values[i]); }, TypeError);
+    assertThrows(
+        function() { Reflect.apply(values[i]); }, TypeError);
+    assertThrows(
+        function() { Reflect.apply(noopStrict, R, values[i]); }, TypeError);
+    assertThrows(
+        function() { Reflect.apply(noop, R, values[i]); }, TypeError);
+  }
+}
+
+
+function TestSIMDTypes() {
+  var types = [ 'float32x4' ];
+  for (var i = 0; i < types.length; ++i) {
+    var type = types[i],
+        lanes = lanesForType(type);
+    TestConstructor(type, lanes);
+    TestType(type, lanes);
+    TestPrototype(type, lanes);
+    TestValueOf(type, lanes);
+    TestGet(type, lanes);
+    TestToBoolean(type, lanes);
+    TestToString(type, lanes);
+    TestToNumber(type, lanes);
+    TestEquality(type, lanes);
+    TestSameValue(type, lanes);
+    TestComparison(type, lanes);
+    TestCall(type, lanes);
+    TestAsSetKey(type, lanes, new Set);
+    TestAsSetKey(type, lanes, new WeakSet);
+    TestAsMapKey(type, lanes, new Map);
+    TestAsMapKey(type, lanes, new WeakMap);
+    TestReflectApply(type);
+  }
+}
+TestSIMDTypes();