8035974: Refactor DigestBase.engineUpdate() method for better code generation by JIT compiler
Move the lopp from DigestBase.engineUpdate() to new private method implCompressMultiBlock() which can be intrinsified.
Reviewed-by: psandoz, ascarpino, forax
diff --git a/jdk/src/share/classes/sun/security/provider/DigestBase.java b/jdk/src/share/classes/sun/security/provider/DigestBase.java
index 58812f3..98af71a 100644
--- a/jdk/src/share/classes/sun/security/provider/DigestBase.java
+++ b/jdk/src/share/classes/sun/security/provider/DigestBase.java
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2014, Oracle and/or its affiliates. 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
@@ -122,10 +122,10 @@
}
}
// compress complete blocks
- while (len >= blockSize) {
- implCompress(b, ofs);
- len -= blockSize;
- ofs += blockSize;
+ if (len >= blockSize) {
+ int limit = ofs + len;
+ ofs = implCompressMultiBlock(b, ofs, limit - blockSize);
+ len = limit - ofs;
}
// copy remainder to buffer
if (len > 0) {
@@ -134,6 +134,14 @@
}
}
+ // compress complete blocks
+ private int implCompressMultiBlock(byte[] b, int ofs, int limit) {
+ for (; ofs <= limit; ofs += blockSize) {
+ implCompress(b, ofs);
+ }
+ return ofs;
+ }
+
// reset this object. See JCA doc.
protected final void engineReset() {
if (bytesProcessed == 0) {
