[turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.

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

Index: test/cctest/compiler/test-run-machops.cc
diff --git a/test/cctest/compiler/test-run-machops.cc b/test/cctest/compiler/test-run-machops.cc
index a7b1768d2a541ceac63234314dfee5b087cee5f6..7c505a79ac5edec5d211dc97a35436d33290e1ac 100644
--- a/test/cctest/compiler/test-run-machops.cc
+++ b/test/cctest/compiler/test-run-machops.cc
@@ -4647,6 +4647,46 @@ TEST(RunFloat32Constant) {
 }
 
 
+TEST(RunFloat64ExtractWord32) {
+  uint64_t input = 0;
+  for (int location = 0; location < 2; ++location) {
+    RawMachineAssemblerTester<int32_t> m;
+    m.Return(m.Float64ExtractWord32(location,
+                                    m.LoadFromPointer(&input, kMachFloat64)));
+    FOR_FLOAT64_INPUTS(i) {
+      input = bit_cast<uint64_t>(*i);
+      int32_t expected =
+          bit_cast<int32_t>(static_cast<uint32_t>(input >> (location * 32)));
+      CHECK_EQ(expected, m.Call());
+    }
+  }
+}
+
+
+TEST(RunFloat64InsertWord32) {
+  uint64_t input = 0;
+  uint64_t result = 0;
+  for (int location = 0; location < 2; ++location) {
+    RawMachineAssemblerTester<int32_t> m(kMachInt32);
+    m.StoreToPointer(
+        &result, kMachFloat64,
+        m.Float64InsertWord32(location, m.LoadFromPointer(&input, kMachFloat64),
+                              m.Parameter(0)));
+    m.Return(m.Int32Constant(0));
+    FOR_FLOAT64_INPUTS(i) {
+      FOR_INT32_INPUTS(j) {
+        input = bit_cast<uint64_t>(*i);
+        uint64_t expected =
+            (input & ~(V8_UINT64_C(0xFFFFFFFF) << (location * 32))) |
+            (static_cast<uint64_t>(bit_cast<uint32_t>(*j)) << (location * 32));
+        CHECK_EQ(0, m.Call(*j));
+        CHECK_EQ(expected, result);
+      }
+    }
+  }
+}
+
+
 static double two_30 = 1 << 30;             // 2^30 is a smi boundary.
 static double two_52 = two_30 * (1 << 22);  // 2^52 is a precision boundary.
 static double kValues[] = {0.1,