[builtins] Introduce proper Float64Atan and Float64Atan2 operators.

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.
 
 #include <cmath>
 #include <functional>
 #include <limits>
 
 #include "src/base/bits.h"
 #include "src/base/ieee754.h"
@@ skipping 5478 matching lines @@
   FOR_FLOAT32_INPUTS(i) { CHECK_FLOAT_EQ(std::abs(*i), m.Call(*i)); }
 }
 
 
 TEST(RunFloat64Abs) {
   BufferedRawMachineAssemblerTester<double> m(MachineType::Float64());
   m.Return(m.Float64Abs(m.Parameter(0)));
   FOR_FLOAT64_INPUTS(i) { CHECK_DOUBLE_EQ(std::abs(*i), m.Call(*i)); }
 }
 
+TEST(RunFloat64Atan) {
+  BufferedRawMachineAssemblerTester<double> m(MachineType::Float64());
+  m.Return(m.Float64Atan(m.Parameter(0)));
+  CHECK(std::isnan(m.Call(std::numeric_limits<double>::quiet_NaN())));
+  CHECK(std::isnan(m.Call(std::numeric_limits<double>::signaling_NaN())));
+  CHECK_DOUBLE_EQ(-0.0, m.Call(-0.0));
+  CHECK_DOUBLE_EQ(0.0, m.Call(0.0));
+  FOR_FLOAT64_INPUTS(i) { CHECK_DOUBLE_EQ(ieee754::atan(*i), m.Call(*i)); }
+}
+
+TEST(RunFloat64Atan2) {
+  BufferedRawMachineAssemblerTester<double> m(MachineType::Float64(),
+                                              MachineType::Float64());
+  m.Return(m.Float64Atan2(m.Parameter(0), m.Parameter(1)));
+  FOR_FLOAT64_INPUTS(i) {
+    FOR_FLOAT64_INPUTS(j) {
+      CHECK_DOUBLE_EQ(ieee754::atan2(*i, *j), m.Call(*i, *j));
+    }
+  }
+}
+
 TEST(RunFloat64Log) {
   BufferedRawMachineAssemblerTester<double> m(MachineType::Float64());
   m.Return(m.Float64Log(m.Parameter(0)));
   CHECK(std::isnan(m.Call(std::numeric_limits<double>::quiet_NaN())));
   CHECK(std::isnan(m.Call(std::numeric_limits<double>::signaling_NaN())));
   CHECK(std::isnan(m.Call(-std::numeric_limits<double>::infinity())));
   CHECK(std::isnan(m.Call(-1.0)));
   CHECK_DOUBLE_EQ(-std::numeric_limits<double>::infinity(), m.Call(-0.0));
   CHECK_DOUBLE_EQ(-std::numeric_limits<double>::infinity(), m.Call(0.0));
   CHECK_DOUBLE_EQ(0.0, m.Call(1.0));
@@ skipping 778 matching lines @@
   r.Goto(&merge);
   r.Bind(&merge);
   Node* phi = r.Phi(MachineRepresentation::kWord32, fa, fb);
   r.Return(phi);
   CHECK_EQ(1, r.Call(1));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8