[builtins] Introduce proper Float64Log1p operator.

src/compiler/mips64/instruction-selector-mips64.cc

Index: src/compiler/mips64/instruction-selector-mips64.cc
diff --git a/src/compiler/mips64/instruction-selector-mips64.cc b/src/compiler/mips64/instruction-selector-mips64.cc
index e7d2ec0853577bd8d8b49cd54184541ba05bff60..abcde813d10470fe21ccce6adc0c8da3d1ea8b00 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -1282,13 +1282,6 @@ void InstructionSelector::VisitFloat64Abs(Node* node) {
   VisitRR(this, kMips64AbsD, node);
 }
 
-void InstructionSelector::VisitFloat64Log(Node* node) {
-  Mips64OperandGenerator g(this);
-  Emit(kIeee754Float64Log, g.DefineAsFixed(node, f0),
-       g.UseFixed(node->InputAt(0), f12))
-      ->MarkAsCall();
-}
-
 void InstructionSelector::VisitFloat32Sqrt(Node* node) {
   VisitRR(this, kMips64SqrtS, node);
 }
@@ -1347,6 +1340,13 @@ void InstructionSelector::VisitFloat32Neg(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitFloat64Neg(Node* node) { UNREACHABLE(); }
 
+void InstructionSelector::VisitFloat64Ieee754Unop(Node* node,
+                                                  InstructionCode opcode) {
+  Mips64OperandGenerator g(this);
+  Emit(opcode, g.DefineAsFixed(node, f0), g.UseFixed(node->InputAt(0), f12))
+      ->MarkAsCall();
+}
+
 void InstructionSelector::EmitPrepareArguments(
     ZoneVector<PushParameter>* arguments, const CallDescriptor* descriptor,
     Node* node) {