src/share/vm/opto/library_call.cpp

rev 7958 : 8152172: PPC64: Support AES intrinsics
Reviewed-by: kvn, mdoerr, simonis
Contributed-by: horii@jp.ibm.com

@@ -6457,11 +6457,24 @@
   return true;
 }
 
 //------------------------------get_key_start_from_aescrypt_object-----------------------
 Node * LibraryCallKit::get_key_start_from_aescrypt_object(Node *aescrypt_object) {
+#ifdef PPC64
+  // MixColumns for decryption can be reduced by preprocessing MixColumns with round keys.
+  // Intel's extention is based on this optimization and AESCrypt generates round keys by preprocessing MixColumns.
+  // However, ppc64 vncipher processes MixColumns and requires the same round keys with encryption.
+  // The ppc64 stubs of encryption and decryption use the same round keys (sessionK[0]).
+  Node* objSessionK = load_field_from_object(aescrypt_object, "sessionK", "[[I", /*is_exact*/ false);
+  assert (objSessionK != NULL, "wrong version of com.sun.crypto.provider.AESCrypt");
+  if (objSessionK == NULL) {
+    return (Node *) NULL;
+  }
+  Node* objAESCryptKey = load_array_element(control(), objSessionK, intcon(0), TypeAryPtr::OOPS);
+#else
   Node* objAESCryptKey = load_field_from_object(aescrypt_object, "K", "[I", /*is_exact*/ false);
+#endif // PPC64
   assert (objAESCryptKey != NULL, "wrong version of com.sun.crypto.provider.AESCrypt");
   if (objAESCryptKey == NULL) return (Node *) NULL;
 
   // now have the array, need to get the start address of the K array
   Node* k_start = array_element_address(objAESCryptKey, intcon(0), T_INT);