> This patch extends the `ISO_8859_1.implEncodeISOArray` intrinsic on x86 to > work also for ASCII encoding, which makes for example the `UTF_8$Encoder` > perform on par with (or outperform) similarly getting charset encoded bytes > from a String. The former took a small performance hit in JDK 9, and the > latter improved greatly in the same release. > > Extending the `EncodeIsoArray` intrinsics on other platforms should be > possible, but I'm unfamiliar with the macro assembler in general and unlike > the x86 intrinsic they don't use a simple vectorized mask to implement the > latin-1 check. For example aarch64 seem to filter out the low bytes and then > check if there's any bits set in the high bytes. Clever, but very different > to the 0xFF80 2-byte mask that an ASCII test wants.
Claes Redestad has updated the pull request incrementally with one additional commit since the last revision: Add fail-safe predicate to all encode_iso_array to only match non-ASCII EncodeISOArrayNodes ------------- Changes: - all: https://git.openjdk.java.net/jdk/pull/5621/files - new: https://git.openjdk.java.net/jdk/pull/5621/files/47633cba..b4a5d105 Webrevs: - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5621&range=04 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5621&range=03-04 Stats: 3 lines in 3 files changed: 3 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/5621.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5621/head:pull/5621 PR: https://git.openjdk.java.net/jdk/pull/5621
