> Vector API defines zero-extend operations [1], which are going to be > intrinsified and generated to `VectorUCastNode` by C2. This patch adds > backend implementation for `VectorUCastNode` on AArch64. > > The micro benchmark shows significant performance improvement. In my test > machine (SVE, 256-bit), the result is shown as below: > > > > Benchmark Before After Units Gain > VectorZeroExtend.byte2Int 3168.251 243012.399 ops/ms 75.70 > VectorZeroExtend.byte2Long 3212.201 216291.588 ops/ms 66.33 > VectorZeroExtend.byte2Short 3391.968 182655.365 ops/ms 52.85 > VectorZeroExtend.int2Long 1012.197 80448.553 ops/ms 78.48 > VectorZeroExtend.short2Int 1812.471 153416.828 ops/ms 83.65 > VectorZeroExtend.short2Long 1788.382 129794.814 ops/ms 71.58 > > > On other Neon systems, we can get similar performance boost as a result of > intrinsification success. > > Since `VectorUCastNode` only used in Vector API's zero extension currently, > this patch also adds assertion on nodes' definitions to clarify their usages. > > [TEST] > compiler/vectorapi and jdk/incubator/vector passed on NEON and SVE machines. > > [1] > https://github.com/openjdk/jdk/blob/master/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/VectorOperators.java#L726
Eric Liu has updated the pull request incrementally with one additional commit since the last revision: update m4 Change-Id: I82bf5f9384f79e09965a0498ad2de45cec6f0a29 ------------- Changes: - all: https://git.openjdk.org/jdk/pull/16670/files - new: https://git.openjdk.org/jdk/pull/16670/files/28552291..4fb3128f Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=16670&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16670&range=00-01 Stats: 61 lines in 2 files changed: 3 ins; 40 del; 18 mod Patch: https://git.openjdk.org/jdk/pull/16670.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16670/head:pull/16670 PR: https://git.openjdk.org/jdk/pull/16670
