MIPS[64]: Fix `Internalize strings in-place (reland)`

src/mips64/code-stubs-mips64.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.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 1458 matching lines @@
   __ JumpIfNotSmi(a1, &runtime);
   __ ld(a3, FieldMemOperand(a3, String::kLengthOffset));
   __ Branch(&runtime, ls, a3, Operand(a1));
   __ SmiUntag(a1);
 
   STATIC_ASSERT(kStringEncodingMask == 8);
   STATIC_ASSERT(kOneByteStringTag == 8);
   STATIC_ASSERT(kTwoByteStringTag == 0);
   __ And(a0, a0, Operand(kStringEncodingMask));  // Non-zero for one_byte.
   __ ld(t9, FieldMemOperand(regexp_data, JSRegExp::kDataOneByteCodeOffset));
-  __ dsra(a3, a0, 2);  // a3 is 1 for one_byte, 0 for UC16 (used below).
+  __ dsra(a3, a0, 3);  // a3 is 1 for one_byte, 0 for UC16 (used below).
   __ ld(a5, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset));
   __ Movz(t9, a5, a0);  // If UC16 (a0 is 0), replace t9 w/kDataUC16CodeOffset.
 
   // (E) Carry on.  String handling is done.
   // t9: irregexp code
   // Check that the irregexp code has been generated for the actual string
   // encoding. If it has, the field contains a code object otherwise it contains
   // a smi (code flushing support).
   __ JumpIfSmi(t9, &runtime);
 
@@ skipping 2828 matching lines @@
                            kStackUnwindSpace, kInvalidStackOffset,
                            return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64