Implement transcendental cache probing in generated code on ARM....

src/ia32/codegen-ia32.cc

 // Copyright 2010 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10272 matching lines @@
 
   __ bind(&loaded);
   // ST[0] == double value
   // ebx = low 32 bits of double value
   // edx = high 32 bits of double value
   // Compute hash:
   //   h = (low ^ high); h ^= h >> 16; h ^= h >> 8; h = h & (cacheSize - 1);
   __ mov(ecx, ebx);
   __ xor_(ecx, Operand(edx));
   __ mov(eax, ecx);
-  __ sar(eax, 16);
+  __ shr(eax, 16);
   __ xor_(ecx, Operand(eax));
   __ mov(eax, ecx);
-  __ sar(eax, 8);
+  __ shr(eax, 8);
   __ xor_(ecx, Operand(eax));
   ASSERT(IsPowerOf2(TranscendentalCache::kCacheSize));
   __ and_(Operand(ecx), Immediate(TranscendentalCache::kCacheSize - 1));
+
   // ST[0] == double value.
   // ebx = low 32 bits of double value.
   // edx = high 32 bits of double value.
   // ecx = TranscendentalCache::hash(double value).
   __ mov(eax,
          Immediate(ExternalReference::transcendental_cache_array_address()));
   // Eax points to cache array.
   __ mov(eax, Operand(eax, type_ * sizeof(TranscendentalCache::caches_[0])));
   // Eax points to the cache for the type type_.
   // If NULL, the cache hasn't been initialized yet, so go through runtime.
@@ skipping 3390 matching lines @@
   masm.GetCode(&desc);
   // Call the function from C++.
   return FUNCTION_CAST<MemCopyFunction>(buffer);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32