[Simd128] Add CpuFeatures::SupportsSimd128 method.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 207 matching lines @@
     Probe(false);
     return supported_;
   }
 
   static bool IsSupported(CpuFeature f) {
     return (supported_ & (1u << f)) != 0;
   }
 
   static inline bool SupportsCrankshaft();
 
+  static inline bool SupportsSimd128();
+
   static inline unsigned icache_line_size() {
     DCHECK(icache_line_size_ != 0);
     return icache_line_size_;
   }
 
   static inline unsigned dcache_line_size() {
     DCHECK(dcache_line_size_ != 0);
     return dcache_line_size_;
   }
 
@@ skipping 1024 matching lines @@
     std::vector<ConstantPoolEntry> shared_entries;
   };
 
   Label emitted_label_;  // Records pc_offset of emitted pool
   PerTypeEntryInfo info_[ConstantPoolEntry::NUMBER_OF_TYPES];
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_ASSEMBLER_H_