s390: optimize for int 64-bit operation and cleanup

src/s390/assembler-s390.cc

 // 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 1826 matching lines @@
 // GPR <-> FPR Instructions
 
 // Floating point instructions
 //
 // Add Register-Storage (LB)
 void Assembler::adb(DoubleRegister r1, const MemOperand& opnd) {
   rxe_form(ADB, Register::from_code(r1.code()), opnd.rx(), opnd.rb(),
            opnd.offset());
 }
 
+// Add Register-Storage (LB)
+void Assembler::aeb(DoubleRegister r1, const MemOperand& opnd) {
+  rxe_form(AEB, Register::from_code(r1.code()), opnd.rx(), opnd.rb(),
+           opnd.offset());
+}
+
+// Sub Register-Storage (LB)
+void Assembler::seb(DoubleRegister r1, const MemOperand& opnd) {
+  rxe_form(SEB, Register::from_code(r1.code()), opnd.rx(), opnd.rb(),
+           opnd.offset());
+}
+
 // Divide Register-Storage (LB)
 void Assembler::ddb(DoubleRegister r1, const MemOperand& opnd) {
   rxe_form(DDB, Register::from_code(r1.code()), opnd.rx(), opnd.rb(),
            opnd.offset());
 }
 
+// Divide Register-Storage (LB)
+void Assembler::deb(DoubleRegister r1, const MemOperand& opnd) {
+  rxe_form(DEB, Register::from_code(r1.code()), opnd.rx(), opnd.rb(),
+           opnd.offset());
+}
+
 // Multiply Register-Storage (LB)
 void Assembler::mdb(DoubleRegister r1, const MemOperand& opnd) {
   rxe_form(MDB, Register::from_code(r1.code()), opnd.rb(), opnd.rx(),
            opnd.offset());
 }
 
+// Multiply Register-Storage (LB)
+void Assembler::meeb(DoubleRegister r1, const MemOperand& opnd) {
+  rxe_form(MEEB, Register::from_code(r1.code()), opnd.rb(), opnd.rx(),
+           opnd.offset());
+}
+
 // Subtract Register-Storage (LB)
 void Assembler::sdb(DoubleRegister r1, const MemOperand& opnd) {
   rxe_form(SDB, Register::from_code(r1.code()), opnd.rx(), opnd.rb(),
            opnd.offset());
 }
 
 void Assembler::ceb(DoubleRegister r1, const MemOperand& opnd) {
   rxe_form(CEB, Register::from_code(r1.code()), opnd.rx(), opnd.rb(),
            opnd.offset());
 }
@@ skipping 253 matching lines @@
                             SKIP_ICACHE_FLUSH);
     }
 
     reloc_info_writer.Write(&rinfo);
   }
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390