[stubs,interpreter] Optimise SMI loading for 64-bit targets.

src/compiler/arm64/instruction-codes-arm64.h

 // Copyright 2014 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.
 
 #ifndef V8_COMPILER_ARM64_INSTRUCTION_CODES_ARM64_H_
 #define V8_COMPILER_ARM64_INSTRUCTION_CODES_ARM64_H_
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 129 matching lines @@
   V(Arm64LdrS)                     \
   V(Arm64StrS)                     \
   V(Arm64LdrD)                     \
   V(Arm64StrD)                     \
   V(Arm64Ldrb)                     \
   V(Arm64Ldrsb)                    \
   V(Arm64Strb)                     \
   V(Arm64Ldrh)                     \
   V(Arm64Ldrsh)                    \
   V(Arm64Strh)                     \
+  V(Arm64Ldrsw)                    \
   V(Arm64LdrW)                     \
   V(Arm64StrW)                     \
   V(Arm64Ldr)                      \
   V(Arm64Str)
 
 // Addressing modes represent the "shape" of inputs to an instruction.
 // Many instructions support multiple addressing modes. Addressing modes
 // are encoded into the InstructionCode of the instruction and tell the
 // code generator after register allocation which assembler method to call.
 //
@@ skipping 18 matching lines @@
   V(Operand2_R_SXTH)  /* %r0 SXTH (signed extend halfword) */   \
   V(Operand2_R_SXTW)  /* %r0 SXTW (signed extend word) */
 
 enum ResetJSSPAfterCall { kNoResetJSSP, kResetJSSP };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ARM64_INSTRUCTION_CODES_ARM64_H_