Summary of changes: - Intrinsify Math.round(float) and Math.round(double) APIs. - Extend auto-vectorizer to infer vector operations on encountering scalar IR nodes for above intrinsics. - Test creation using new IR testing framework.
Following are the performance number of a JMH micro included with the patch Test System: Intel(R) Xeon(R) Platinum 8380 CPU @ 2.30GHz (Icelake Server) | | BASELINE AVX2 | WithOpt AVX2 | Gain (opt/baseline) | Baseline AVX3 | Withopt AVX3 | Gain (opt/baseline) -- | -- | -- | -- | -- | -- | -- | -- Benchmark | ARRAYLEN | Score (ops/ms) | Score (ops/ms) | | Score (ops/ms) | Score (ops/ms) | FpRoundingBenchmark.test_round_double | 1024 | 518.532 | 1364.066 | 2.630630318 | 512.908 | 4292.11 | 8.368186887 FpRoundingBenchmark.test_round_double | 2048 | 270.137 | 830.986 | 3.076165057 | 273.159 | 2459.116 | 9.002507697 FpRoundingBenchmark.test_round_float | 1024 | 752.436 | 7780.905 | 10.34095259 | 752.49 | 9506.694 | 12.63364829 FpRoundingBenchmark.test_round_float | 2048 | 389.499 | 4113.046 | 10.55983712 | 389.63 | 4863.673 | 12.48279907 Kindly review and share your feedback. Best Regards, Jatin ------------- Commit messages: - 8279508: Auto-vectorize Math.round API Changes: https://git.openjdk.java.net/jdk/pull/7094/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7094&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8279508 Stats: 409 lines in 22 files changed: 342 ins; 1 del; 66 mod Patch: https://git.openjdk.java.net/jdk/pull/7094.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7094/head:pull/7094 PR: https://git.openjdk.java.net/jdk/pull/7094
