[turbofan] Implemented the TruncateFloat32ToInt64 TurboFan operator.

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 5373 matching lines @@
 
 
 TEST(RunBitcastFloat64ToInt64) {
   BufferedRawMachineAssemblerTester<int64_t> m(kMachFloat64);
 
   m.Return(m.BitcastFloat64ToInt64(m.Parameter(0)));
   FOR_FLOAT64_INPUTS(i) { CHECK_EQ(bit_cast<int64_t>(*i), m.Call(*i)); }
 }
 
 
+TEST(RunTruncateFloat32ToInt64) {
+  BufferedRawMachineAssemblerTester<int64_t> m(kMachFloat32);
+  m.Return(m.TruncateFloat32ToInt64(m.Parameter(0)));
+
+  FOR_INT64_INPUTS(i) {
+    float input = static_cast<float>(*i);
+    if (input < 9223372036854775808.0 && input > -9223372036854775809.0) {
+      CHECK_EQ(static_cast<int64_t>(input), m.Call(input));
+    }
+  }
+  FOR_FLOAT32_INPUTS(j) {
+    if (*j < 9223372036854775808.0 && *j > -9223372036854775809.0) {
+      CHECK_EQ(static_cast<int64_t>(*j), m.Call(*j));
+    }
+  }
+}
+
+
 TEST(RunTruncateFloat64ToInt64) {
   BufferedRawMachineAssemblerTester<int64_t> m(kMachFloat64);
   m.Return(m.TruncateFloat64ToInt64(m.Parameter(0)));
 
   FOR_INT64_INPUTS(i) {
     double input = static_cast<double>(*i);
     CHECK_EQ(static_cast<int64_t>(input), m.Call(input));
   }
 }
 
@@ skipping 289 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