[builtins] Introduce proper Float64Log1p operator.

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

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index cae9da8c894ceccf0db29ad87d0f0fbbd7a2bfe7..2f3c791cf791def1f7d96c4bfe9f28c7649aaccc 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -876,13 +876,6 @@ void InstructionSelector::VisitFloat64Abs(Node* node) {
   VisitRR(this, kMipsAbsD, node);
 }
 
-void InstructionSelector::VisitFloat64Log(Node* node) {
-  MipsOperandGenerator g(this);
-  Emit(kIeee754Float64Log, g.DefineAsFixed(node, f0),
-       g.UseFixed(node->InputAt(0), f12))
-      ->MarkAsCall();
-}
-
 void InstructionSelector::VisitFloat32Sqrt(Node* node) {
   VisitRR(this, kMipsSqrtS, node);
 }
@@ -941,6 +934,13 @@ void InstructionSelector::VisitFloat32Neg(Node* node) { UNREACHABLE(); }
 
 void InstructionSelector::VisitFloat64Neg(Node* node) { UNREACHABLE(); }
 
+void InstructionSelector::VisitFloat64Ieee754Unop(Node* node,
+                                                  InstructionCode opcode) {
+  MipsOperandGenerator 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) {