> This patch set encompasses the following commits:
>
> - Adds a new HotSpot intrinsic candidate to the java.lang.Base64 class -
> decodeBlock(), and provides a flexible API for the intrinsic. The API is
> similar to the existing encodeBlock intrinsic.
> - Adds the code in HotSpot to check and martial the new intrinsic's arguments
> to the arch-specific intrinsic implementation
> - Adds a Power64LE-specific implementation of the decodeBlock intrinsic.
> - Adds a JMH microbenchmark for both Base64 encoding and encoding.
> - Enhances the JTReg hotspot intrinsic "TestBase64.java" regression test to
> more fully test both decoding and encoding.
CoreyAshford has updated the pull request incrementally with two additional
commits since the last revision:
- stubGenerator_ppc.cpp: Remove the predicted branch around the xxsel
instruction to improves performance by about 9%
This conditional branch around the xxsel seemed like a good idea at the
time, because I thought the branch would be less costly than the xxsel
instruction, but it turns out not to be the case; executing the xxsel every
time without a conditional branch increases performance by about 9%.
Removing that branch also removed the need for the declaration and usage of
an array of Label's for the branch destinations inside the unrolled code.
- stubGenerator_ppc.cpp: address issues with understanding the pack algorithm
* Change the order of the bytes as listed in the tables, which makes the
use of vpextd easier to understand.
* Because the byte order of the constants used in the tables is reversed
from
the original documentation, change the constant declarations to match the
order
in the table, by using the ARRAY_TO_LXV_ORDER macro. This makes the
constant
declarations more consistent as well.
-------------
Changes:
- all: https://git.openjdk.java.net/jdk/pull/293/files
- new: https://git.openjdk.java.net/jdk/pull/293/files/8e15d971..0e291be4
Webrevs:
- full: https://webrevs.openjdk.java.net/?repo=jdk&pr=293&range=08
- incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=293&range=07-08
Stats: 106 lines in 1 file changed: 25 ins; 12 del; 69 mod
Patch: https://git.openjdk.java.net/jdk/pull/293.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/293/head:pull/293
PR: https://git.openjdk.java.net/jdk/pull/293
