PPC: Clean up register save/restore logic.

src/ppc/code-stubs-ppc.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PPC_CODE_STUBS_PPC_H_
 #define V8_PPC_CODE_STUBS_PPC_H_
 
 namespace v8 {
 namespace internal {
 
@@ skipping 163 matching lines @@
 
     // If we have to call into C then we need to save and restore all caller-
     // saved registers that were not already preserved.  The scratch registers
     // will be restored by other means so we don't bother pushing them here.
     void SaveCallerSaveRegisters(MacroAssembler* masm, SaveFPRegsMode mode) {
       masm->mflr(r0);
       masm->push(r0);
       masm->MultiPush(kJSCallerSaved & ~scratch1_.bit());
       if (mode == kSaveFPRegs) {
         // Save all volatile FP registers except d0.
-        masm->SaveFPRegs(sp, 1, DoubleRegister::kNumVolatileRegisters - 1);
+        masm->MultiPushDoubles(kCallerSavedDoubles & ~d0.bit());
       }
     }
 
     inline void RestoreCallerSaveRegisters(MacroAssembler* masm,
                                            SaveFPRegsMode mode) {
       if (mode == kSaveFPRegs) {
         // Restore all volatile FP registers except d0.
-        masm->RestoreFPRegs(sp, 1, DoubleRegister::kNumVolatileRegisters - 1);
+        masm->MultiPopDoubles(kCallerSavedDoubles & ~d0.bit());
       }
       masm->MultiPop(kJSCallerSaved & ~scratch1_.bit());
       masm->pop(r0);
       masm->mtlr(r0);
     }
 
     inline Register object() { return object_; }
     inline Register address() { return address_; }
     inline Register scratch0() { return scratch0_; }
     inline Register scratch1() { return scratch1_; }
@@ skipping 113 matching lines @@
 
   class LookupModeBits : public BitField<LookupMode, 0, 1> {};
 
   DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
   DEFINE_PLATFORM_CODE_STUB(NameDictionaryLookup, PlatformCodeStub);
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_PPC_CODE_STUBS_PPC_H_