> Migrate Vector API math library (SVML and SLEEF) linkage from native code (in > JVM) to Java FFM API. > > Since FFM API doesn't support vector calling conventions yet, migration > affects only symbol lookup for now. But it still enables significant > simplifications on JVM side. > > The patch consists of the following parts: > * on-demand symbol lookup in Java code replaces eager lookup from native > code during JVM startup; > * 2 new VM intrinsics for vector calls (support unary and binary shapes) > (code separated from unary/binary vector operations); > * new internal interface to query supported CPU ISA extensions > (`jdk.incubator.vector.CPUFeatures`) used for CPU dispatching. > > `java.lang.foreign` API is used to perform symbol lookup in vector math > library, then the address is cached and fed into corresponding JVM intrinsic, > so C2 can turn it into a direct vector call in generated code. > > Once `java.lang.foreign` supports vectors & vector calling conventions, VM > intrinsics can go away. > > Performance is on par with original implementation (tested with > microbenchmarks on linux-x64 and macosx-aarch64). > > Testing: hs-tier1 - hs-tier6, microbenchmarks (on linux-x64 and > macosx-aarch64) > > Thanks!
Vladimir Ivanov has updated the pull request incrementally with one additional commit since the last revision: Fix windows-aarch64 build failure ------------- Changes: - all: https://git.openjdk.org/jdk/pull/24462/files - new: https://git.openjdk.org/jdk/pull/24462/files/9a8f6200..bb1a11db Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=24462&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24462&range=02-03 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/24462.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/24462/head:pull/24462 PR: https://git.openjdk.org/jdk/pull/24462
