S390: Initial test changes and files checkin.

test/cctest/test-hashing.cc

 // Copyright 2011 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 72 matching lines @@
   __ Ret();
   __ SetStackPointer(old_stack_pointer);
 #elif V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_MIPS64
   __ push(kRootRegister);
   __ InitializeRootRegister();
   __ li(v0, Operand(key));
   __ GetNumberHash(v0, t1);
   __ pop(kRootRegister);
   __ jr(ra);
   __ nop();
+#elif V8_TARGET_ARCH_S390
+  __ push(kRootRegister);
+  __ push(ip);
+  __ InitializeRootRegister();
+  __ lhi(r2, Operand(key));
+  __ GetNumberHash(r2, ip);
+  __ pop(ip);
+  __ pop(kRootRegister);
+  __ Ret();
 #elif V8_TARGET_ARCH_PPC
   __ function_descriptor();
   __ push(kRootRegister);
   __ InitializeRootRegister();
   __ li(r3, Operand(key));
   __ GetNumberHash(r3, ip);
   __ pop(kRootRegister);
   __ blr();
 #else
 #error Unsupported architecture.
@@ skipping 51 matching lines @@
   // Some pseudo-random numbers
   static const uint32_t kLimit = 1000;
   for (uint32_t i = 0; i < 5; i++) {
     for (uint32_t j = 0; j < 5; j++) {
       check(PseudoRandom(i, j) % kLimit);
     }
   }
 }
 
 #undef __