S390: [builtins] Migrate Math.log to TurboFan.

src/compiler/s390/instruction-selector-s390.cc

Index: src/compiler/s390/instruction-selector-s390.cc
diff --git a/src/compiler/s390/instruction-selector-s390.cc b/src/compiler/s390/instruction-selector-s390.cc
index 803c1db828b6861ae97f9c340d5acf72c0dc52d8..8176419e15ab1e6dc86f67f2f33c6b6263575210 100644
--- a/src/compiler/s390/instruction-selector-s390.cc
+++ b/src/compiler/s390/instruction-selector-s390.cc
@@ -1191,6 +1191,13 @@ void InstructionSelector::VisitFloat64Abs(Node* node) {
   VisitRR(this, kS390_AbsDouble, node);
 }
 
+void InstructionSelector::VisitFloat64Log(Node* node) {
+  S390OperandGenerator g(this);
+  Emit(kS390_LogDouble, g.DefineAsFixed(node, d1),
+       g.UseFixed(node->InputAt(0), d1))
+      ->MarkAsCall();
+}
+
 void InstructionSelector::VisitFloat32Sqrt(Node* node) {
   VisitRR(this, kS390_SqrtFloat, node);
 }