Implement experimental exponentiation operator

src/full-codegen.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/code-factory.h"
 #include "src/codegen.h"
@@ skipping 478 matching lines @@
   uint8_t depth = Min(loop_depth(), Code::kMaxLoopNestingMarker);
   BackEdgeEntry entry =
       { ast_id, static_cast<unsigned>(masm_->pc_offset()), depth };
   back_edges_.Add(entry, zone());
 }
 
 
 bool FullCodeGenerator::ShouldInlineSmiCase(Token::Value op) {
   // Inline smi case inside loops, but not division and modulo which
   // are too complicated and take up too much space.
-  if (op == Token::DIV ||op == Token::MOD) return false;
+  if (op == Token::DIV ||op == Token::MOD || op == Token::EXP) return false;
   if (FLAG_always_inline_smi_code) return true;
   return loop_depth_ > 0;
 }
 
 
 void FullCodeGenerator::EffectContext::Plug(Register reg) const {
 }
 
 
 void FullCodeGenerator::AccumulatorValueContext::Plug(Register reg) const {
@@ skipping 1313 matching lines @@
   }
   codegen_->PrepareForBailoutForId(exit_id_, NO_REGISTERS);
   codegen_->scope_ = saved_scope_;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal