Create a common subclass for arrays

src/mips/stub-cache-mips.cc

Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index 84ff991ce20501e8b464b617387dc3222a79d7cd..995104c3eef8abebbb6a2a9a711dc7d8fba8d0eb 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -3494,7 +3494,7 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
   __ lw(t1, FieldMemOperand(a3, ExternalArray::kLengthOffset));
   __ sra(t2, key, kSmiTagSize);
   // Unsigned comparison catches both negative and too-large values.
-  __ Branch(&miss_force_generic, Uless, t1, Operand(t2));
+  __ Branch(&miss_force_generic, Ugreater_equal, key, Operand(t1));
 
   __ lw(a3, FieldMemOperand(a3, ExternalArray::kExternalPointerOffset));
   // a3: base pointer of external storage
@@ -3831,7 +3831,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
   __ SmiUntag(t0, key);
   __ lw(t1, FieldMemOperand(a3, ExternalArray::kLengthOffset));
   // Unsigned comparison catches both negative and too-large values.
-  __ Branch(&miss_force_generic, Ugreater_equal, t0, Operand(t1));
+  __ Branch(&miss_force_generic, Ugreater_equal, key, Operand(t1));
 
   // Handle both smis and HeapNumbers in the fast path. Go to the
   // runtime for all other kinds of values.