PPC: Clean up register save/restore logic.

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index 95e98e48e33ac515a5c9ae2a4bd9b1cadd22b89c..77621e7133943a3c82286904e7709a6e318e267c 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -152,8 +152,11 @@ class MacroAssembler : public Assembler {
   void Move(Register dst, Register src, Condition cond = al);
   void Move(DoubleRegister dst, DoubleRegister src);
 
-  void MultiPush(RegList regs);
-  void MultiPop(RegList regs);
+  void MultiPush(RegList regs, Register location = sp);
+  void MultiPop(RegList regs, Register location = sp);
+
+  void MultiPushDoubles(RegList dregs, Register location = sp);
+  void MultiPopDoubles(RegList dregs, Register location = sp);
 
   // Load an object from the root table.
   void LoadRoot(Register destination, Heap::RootListIndex index,
@@ -888,12 +891,6 @@ class MacroAssembler : public Assembler {
     bind(&label);
   }
 
-  // Pushes <count> double values to <location>, starting from d<first>.
-  void SaveFPRegs(Register location, int first, int count);
-
-  // Pops <count> double values from <location>, starting from d<first>.
-  void RestoreFPRegs(Register location, int first, int count);
-
   // ---------------------------------------------------------------------------
   // Runtime calls