[builtins] Migrate Math.log to TurboFan.

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 6f8feb75d70c312b5ff953f0eb985d61525e0898..f7502ca668c2b4f3a28960f049f42e19aede8696 100644
--- a/test/cctest/compiler/test-run-machops.cc
+++ b/test/cctest/compiler/test-run-machops.cc
@@ -5495,6 +5495,20 @@ TEST(RunFloat64Abs) {
   FOR_FLOAT64_INPUTS(i) { CHECK_DOUBLE_EQ(std::abs(*i), m.Call(*i)); }
 }
 
+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())));

[ahaas, 2016/06/03 09:32:49]

Aren't these checks included in the FOR_FLOAT64_INPUTS anyways?

[Benedikt Meurer, 2016/06/03 09:40:28]

Yes, but I want to make them explicit. These are the cases that explicitly
listed in the spec.

+  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));
+  CHECK_DOUBLE_EQ(std::numeric_limits<double>::infinity(),
+                  m.Call(std::numeric_limits<double>::infinity()));
+  FOR_FLOAT64_INPUTS(i) { CHECK_DOUBLE_EQ(std::log(*i), m.Call(*i)); }
+}
 
 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.