PPC: [runtime] Add %ToString and %_ToString and remove the TO_STRING builtin.

src/ppc/macro-assembler-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_MACRO_ASSEMBLER_PPC_H_
 #define V8_PPC_MACRO_ASSEMBLER_PPC_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/frames.h"
@@ skipping 869 matching lines @@
   // Compute dst = left - right, setting condition codes. dst may be same as
   // either left or right (or a unique register). left and right must not be
   // the same register.
   void SubAndCheckForOverflow(Register dst, Register left, Register right,
                               Register overflow_dst, Register scratch = r0);
 
   void BranchOnOverflow(Label* label) { blt(label, cr0); }
 
   void BranchOnNoOverflow(Label* label) { bge(label, cr0); }
 
-  void RetOnOverflow(void) {
-    Label label;
+  void RetOnOverflow(void) { Ret(lt, cr0); }
 
-    blt(&label, cr0);
-    Ret();
-    bind(&label);
-  }
-
-  void RetOnNoOverflow(void) {
-    Label label;
-
-    bge(&label, cr0);
-    Ret();
-    bind(&label);
-  }
+  void RetOnNoOverflow(void) { Ret(ge, cr0); }
 
   // ---------------------------------------------------------------------------
   // Runtime calls
 
   // Call a code stub.
   void CallStub(CodeStub* stub, TypeFeedbackId ast_id = TypeFeedbackId::None(),
                 Condition cond = al);
 
   // Call a code stub.
   void TailCallStub(CodeStub* stub, Condition cond = al);
@@ skipping 658 matching lines @@
 #define ACCESS_MASM(masm)    \
   masm->stop(__FILE_LINE__); \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 }
 }  // namespace v8::internal
 
 #endif  // V8_PPC_MACRO_ASSEMBLER_PPC_H_