s390: optimize for int 64-bit operation and cleanup

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 1185 matching lines @@
   void cgdbr(Condition m, Register fixReg, DoubleRegister fltReg);
   void cfebr(Condition m3, Register fixReg, DoubleRegister fltReg);
   void cefbr(Condition m3, DoubleRegister fltReg, Register fixReg);
 
   // Floating Point Compare Instructions
   void cdb(DoubleRegister r1, const MemOperand& opnd);
   void ceb(DoubleRegister r1, const MemOperand& opnd);
 
   // Floating Point Arithmetic Instructions
   void adb(DoubleRegister r1, const MemOperand& opnd);
+  void aeb(DoubleRegister r1, const MemOperand& opnd);
   void sdb(DoubleRegister r1, const MemOperand& opnd);
+  void seb(DoubleRegister r1, const MemOperand& opnd);
   void mdb(DoubleRegister r1, const MemOperand& opnd);
+  void meeb(DoubleRegister r1, const MemOperand& opnd);
   void ddb(DoubleRegister r1, const MemOperand& opnd);
+  void deb(DoubleRegister r1, const MemOperand& opnd);
   void sqdb(DoubleRegister r1, const MemOperand& opnd);
   void ldeb(DoubleRegister r1, const MemOperand& opnd);
 
   enum FIDBRA_MASK3 {
     FIDBRA_CURRENT_ROUNDING_MODE = 0,
     FIDBRA_ROUND_TO_NEAREST_AWAY_FROM_0 = 1,
     // ...
     FIDBRA_ROUND_TOWARD_0 = 5,
     FIDBRA_ROUND_TOWARD_POS_INF = 6,
     FIDBRA_ROUND_TOWARD_NEG_INF = 7
@@ skipping 246 matching lines @@
 
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) { assembler->CheckBuffer(); }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_S390_ASSEMBLER_S390_H_