Implemented the Word64Popcnt TurboFan operator for x64.

test/cctest/compiler/test-run-machops.cc

 // Copyright 2014 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.
 
 // TODO(jochen): Remove this after the setting is turned on globally.
 #define V8_IMMINENT_DEPRECATION_WARNINGS
 
 #include <cmath>
 #include <functional>
 #include <limits>
@@ skipping 266 matching lines @@
   CHECK_EQ(8, m.Call(uint64_t(0x00000000cb4dc100)));
   CHECK_EQ(7, m.Call(uint64_t(0x00000000dfbec580)));
   CHECK_EQ(6, m.Call(uint64_t(0x0000000027a9db40)));
   CHECK_EQ(5, m.Call(uint64_t(0x00000000de3bcb20)));
   CHECK_EQ(4, m.Call(uint64_t(0x00000000d7e8a610)));
   CHECK_EQ(3, m.Call(uint64_t(0x000000009afdbc88)));
   CHECK_EQ(2, m.Call(uint64_t(0x000000009afdbc84)));
   CHECK_EQ(1, m.Call(uint64_t(0x000000009afdbc82)));
   CHECK_EQ(0, m.Call(uint64_t(0x000000009afdbc81)));
 }
+
+
+TEST(RunWord64Popcnt) {
+  BufferedRawMachineAssemblerTester<int32_t> m(kMachUint64);
+  if (!m.machine()->Word64Popcnt().IsSupported()) {
+    return;
+  }
+
+  m.Return(m.AddNode(m.machine()->Word64Popcnt().op(), m.Parameter(0)));
+
+  CHECK_EQ(0, m.Call(uint64_t(0x0000000000000000)));
+  CHECK_EQ(1, m.Call(uint64_t(0x0000000000000001)));
+  CHECK_EQ(1, m.Call(uint64_t(0x8000000000000000)));
+  CHECK_EQ(64, m.Call(uint64_t(0xffffffffffffffff)));
+  CHECK_EQ(12, m.Call(uint64_t(0x000dc100000dc100)));
+  CHECK_EQ(18, m.Call(uint64_t(0xe00dc100e00dc100)));
+  CHECK_EQ(22, m.Call(uint64_t(0xe00dc103e00dc103)));
+  CHECK_EQ(18, m.Call(uint64_t(0x000dc107000dc107)));
+}
 #endif  // V8_TARGET_ARCH_64_BIT
 
 
 static Node* Int32Input(RawMachineAssemblerTester<int32_t>* m, int index) {
   switch (index) {
     case 0:
       return m->Parameter(0);
     case 1:
       return m->Parameter(1);
     case 2:
@@ skipping 5136 matching lines @@
   Node* call = r.AddNode(r.common()->Call(desc), phi);
   r.Return(call);
 
   CHECK_EQ(33, r.Call(1));
   CHECK_EQ(44, r.Call(0));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8