src/hotspot/cpu/ppc/templateInterpreterGenerator_ppc.cpp

rev 53302 : 8216060: [PPC64] Vector CRC implementation should be used by interpreter and be faster for short arrays
Reviewed-by: gromero, goetz

@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2015, 2018, SAP SE. All rights reserved.
+ * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2019, SAP SE. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -1916,14 +1916,16 @@
       __ addi(data, data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
     }
 
     StubRoutines::ppc64::generate_load_crc_table_addr(_masm, table);
 
-    // Performance measurements show the 1word and 2word variants to be almost equivalent,
-    // with very light advantages for the 1word variant. We chose the 1word variant for
-    // code compactness.
+    if (!VM_Version::has_vpmsumb()) {
     __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3, true);
+    } else {
+      StubRoutines::ppc64::generate_load_crc_constants_addr(_masm, t0);
+      __ kernel_crc32_vpmsum(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, true);
+    }
 
     // Restore caller sp for c2i case (from compiled) and for resized sender frame (from interpreted).
     __ resize_frame_absolute(R21_sender_SP, R11_scratch1, R0);
     __ blr();
 

@@ -2004,14 +2006,16 @@
       __ addi(data, data, arrayOopDesc::base_offset_in_bytes(T_BYTE));
     }
 
     StubRoutines::ppc64::generate_load_crc32c_table_addr(_masm, table);
 
-    // Performance measurements show the 1word and 2word variants to be almost equivalent,
-    // with very light advantages for the 1word variant. We chose the 1word variant for
-    // code compactness.
+    if (!VM_Version::has_vpmsumb()) {
     __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, tc3, false);
+    } else {
+      StubRoutines::ppc64::generate_load_crc32c_constants_addr(_masm, t0);
+      __ kernel_crc32_vpmsum(crc, data, dataLen, table, t0, t1, t2, t3, tc0, tc1, tc2, false);
+    }
 
     // Restore caller sp for c2i case (from compiled) and for resized sender frame (from interpreted).
     __ resize_frame_absolute(R21_sender_SP, R11_scratch1, R0);
     __ blr();