S390: Optimize For Mul in TurboFan codegen

src/s390/macro-assembler-s390.h

Index: src/s390/macro-assembler-s390.h
diff --git a/src/s390/macro-assembler-s390.h b/src/s390/macro-assembler-s390.h
index 23216fc1be566169f70dc3a484105f7f6bdc190a..b8ed3a057d9e5484e1aa7275d4ae628da4919246 100644
--- a/src/s390/macro-assembler-s390.h
+++ b/src/s390/macro-assembler-s390.h
@@ -301,6 +301,12 @@ class MacroAssembler : public Assembler {
   void MulP(Register dst, Register src);
   void MulP(Register dst, const MemOperand& opnd);
   void Mul(Register dst, Register src1, Register src2);
+  void Mul32(Register dst, const MemOperand& src1);
+  void Mul32(Register dst, Register src1);
+  void Mul32(Register dst, const Operand& src1);
+  void Mul64(Register dst, const MemOperand& src1);
+  void Mul64(Register dst, Register src1);
+  void Mul64(Register dst, const Operand& src1);
 
   // Divide
   void DivP(Register dividend, Register divider);