> Hi All, > > This patch adds C2 compiler support for various Float16 operations added by > [PR#22128](https://github.com/openjdk/jdk/pull/22128) > > Following is the summary of changes included with this patch:- > > 1. Detection of various Float16 operations through inline expansion or > pattern folding idealizations. > 2. Float16 operations like add, sub, mul, div, max, and min are inferred > through pattern folding idealization. > 3. Float16 SQRT and FMA operation are inferred through inline expansion and > their corresponding entry points are defined in the newly added Float16Math > class. > - These intrinsics receive unwrapped short arguments encoding IEEE > 754 binary16 values. > 5. New specialized IR nodes for Float16 operations, associated idealizations, > and constant folding routines. > 6. New Ideal type for constant and non-constant Float16 IR nodes. Please > refer to [FAQs > ](https://github.com/openjdk/jdk/pull/22754#issuecomment-2543982577)for more > details. > 7. Since Float16 uses short as its storage type, hence raw FP16 values are > always loaded into general purpose register, but FP16 ISA generally operates > over floating point registers, thus the compiler injects reinterpretation IR > before and after Float16 operation nodes to move short value to floating > point register and vice versa. > 8. New idealization routines to optimize redundant reinterpretation chains. > HF2S + S2HF = HF > 9. X86 backend implementation for all supported intrinsics. > 10. Functional and Performance validation tests. > > Kindly review the patch and share your feedback. > > Best Regards, > Jatin
Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains nine additional commits since the last revision: - Updating copyright year of modified files. - Merge branch 'master' of http://github.com/openjdk/jdk into JDK-8342103 - Review suggestions incorporated. - Review comments resolutions - Addressing review comments - Fixing obfuscation due to intrinsic entries - Adding more test points - Adding missed check in container type detection. - C2 compiler support for float16 scalar operations. ------------- Changes: - all: https://git.openjdk.org/jdk/pull/22754/files - new: https://git.openjdk.org/jdk/pull/22754/files/dd444c44..d3cbf2c4 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=22754&range=07 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22754&range=06-07 Stats: 17820 lines in 567 files changed: 13308 ins; 2583 del; 1929 mod Patch: https://git.openjdk.org/jdk/pull/22754.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/22754/head:pull/22754 PR: https://git.openjdk.org/jdk/pull/22754
