s390: use new mul instruction

src/s390/assembler-s390.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1142 matching lines @@
   void sgrk(Register r1, Register r2, Register r3);
 
   // 32-bit Subtract Logical Instructions
   void slrk(Register r1, Register r2, Register r3);
 
   // 64-bit Subtract Logical Instructions
   void slgrk(Register r1, Register r2, Register r3);
 
   // 32-bit Multiply Instructions
   void mhi(Register r1, const Operand& opnd);
+  void msrkc(Register r1, Register r2, Register r3);
+  void msgrkc(Register r1, Register r2, Register r3);
 
   // 64-bit Multiply Instructions
   void mghi(Register r1, const Operand& opnd);
 
   // Bitwise Instructions (AND / OR / XOR)
   void nrk(Register r1, Register r2, Register r3);
   void ngrk(Register r1, Register r2, Register r3);
   void ork(Register r1, Register r2, Register r3);
   void ogrk(Register r1, Register r2, Register r3);
   void xrk(Register r1, Register r2, Register r3);
@@ skipping 290 matching lines @@
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_S390_ASSEMBLER_S390_H_