[builtins] Introduce proper Float64Log1p operator.

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index 5f7e5cf4813847bcdcb6e0d337027012ab28f270..b87178a2e4946035ae374c0557e5f5b65c1dfa0a 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -1355,13 +1355,6 @@ void InstructionSelector::VisitFloat64Abs(Node* node) {
   VisitFloatUnop(this, node, node->InputAt(0), kAVXFloat64Abs, kSSEFloat64Abs);
 }
 
-void InstructionSelector::VisitFloat64Log(Node* node) {
-  X64OperandGenerator g(this);
-  Emit(kIeee754Float64Log, g.DefineAsFixed(node, xmm0),
-       g.UseFixed(node->InputAt(0), xmm0))
-      ->MarkAsCall();
-}
-
 void InstructionSelector::VisitFloat64Sqrt(Node* node) {
   VisitRO(this, node, kSSEFloat64Sqrt);
 }
@@ -1415,6 +1408,13 @@ void InstructionSelector::VisitFloat32Neg(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitFloat64Neg(Node* node) { UNREACHABLE(); }
 
+void InstructionSelector::VisitFloat64Ieee754Unop(Node* node,
+                                                  InstructionCode opcode) {
+  X64OperandGenerator g(this);
+  Emit(opcode, g.DefineAsFixed(node, xmm0), g.UseFixed(node->InputAt(0), xmm0))
+      ->MarkAsCall();
+}
+
 void InstructionSelector::EmitPrepareArguments(
     ZoneVector<PushParameter>* arguments, const CallDescriptor* descriptor,
     Node* node) {