[stubs] StringToNumberStub --> StringToNumber builtin.

src/ppc/builtins-ppc.cc

 // 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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 2732 matching lines @@
   //  -- r4 : requested object size (untagged)
   //  -- lr : return address
   // -----------------------------------
   __ SmiTag(r4);
   __ LoadSmiLiteral(r5, Smi::FromInt(AllocateTargetSpace::encode(OLD_SPACE)));
   __ Push(r4, r5);
   __ LoadSmiLiteral(cp, Smi::FromInt(0));
   __ TailCallRuntime(Runtime::kAllocateInTargetSpace);
 }
 
+// static
+void Builtins::Generate_StringToNumber(MacroAssembler* masm) {
+  // The StringToNumber stub takes one argument in r3.
+  __ AssertString(r3);
+
+  // Check if string has a cached array index.
+  Label runtime;
+  __ lwz(r5, FieldMemOperand(r3, String::kHashFieldOffset));
+  __ And(r0, r5, Operand(String::kContainsCachedArrayIndexMask), SetRC);
+  __ bne(&runtime, cr0);
+  __ IndexFromHash(r5, r3);
+  __ blr();
+
+  __ bind(&runtime);
+  __ push(r3);  // Push argument.
+  __ TailCallRuntime(Runtime::kStringToNumber);
+}
+
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r3 : actual number of arguments
   //  -- r4 : function (passed through to callee)
   //  -- r5 : expected number of arguments
   //  -- r6 : new target (passed through to callee)
   // -----------------------------------
 
   Label invoke, dont_adapt_arguments, stack_overflow;
 
@@ skipping 119 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC