S390X: Prevent upper 32bit corruption in 32bit ops

src/s390/macro-assembler-s390.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_S390_MACRO_ASSEMBLER_S390_H_
 #define V8_S390_MACRO_ASSEMBLER_S390_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/frames.h"
@@ skipping 314 matching lines @@
   void CmpLogical32(Register dst, const MemOperand& opnd);
   void CmpLogicalP(Register dst, const MemOperand& opnd);
 
   // Compare Logical Byte (CLI/CLIY)
   void CmpLogicalByte(const MemOperand& mem, const Operand& imm);
 
   // Load 32bit
   void Load(Register dst, const MemOperand& opnd);
   void Load(Register dst, const Operand& opnd);
   void LoadW(Register dst, const MemOperand& opnd, Register scratch = no_reg);
+  void LoadW(Register dst, Register src);
   void LoadlW(Register dst, const MemOperand& opnd, Register scratch = no_reg);
+  void LoadlW(Register dst, Register src);
   void LoadB(Register dst, const MemOperand& opnd);
   void LoadB(Register dst, Register src);
   void LoadlB(Register dst, const MemOperand& opnd);
 
   // Load And Test
   void LoadAndTest32(Register dst, Register src);
   void LoadAndTestP_ExtendSrc(Register dst, Register src);
   void LoadAndTestP(Register dst, Register src);
 
   void LoadAndTest32(Register dst, const MemOperand& opnd);
@@ skipping 1542 matching lines @@
 #define ACCESS_MASM(masm)    \
   masm->stop(__FILE_LINE__); \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_S390_MACRO_ASSEMBLER_S390_H_