Bug ID: JDK-8294588 Auto vectorize half precision floating point conversion APIs

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JDK 20
20 b27Fixed

Changeset: 073897c8 Author: Smita Kamath <svkamath@openjdk.org> Committer: Jatin Bhateja <jbhateja@openjdk.org> Date: 2022-12-08 09:46:59 +0000 URL: https://git.openjdk.org/jdk/commit/073897c88bbc430e8751a18baf7487f6474fd0c3

08-12-2022

New test failed when run with `-XX:UseAVX=1` on machine which supports avx512 and f16c: One or more @IR rules failed: Failed IR Rules (2) of Methods (2) ---------------------------------- 1) Method "public void compiler.vectorization.TestFloatConversionsVector.test_float16_float(float[],short[])" - [Failed IR rules: 1]: * @IR rule 1: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={DEFAULT}, applyIf={}, applyIfCPUFeatureOr={"avx512f", "true", "f16c", "true"}, applyIfCPUFeature={}, counts={"_#VECTOR_CAST_H2F#_", "> 0"}, applyIfAnd={}, failOn={}, applyIfOr={}, applyIfNot={})" > Phase "PrintIdeal": - counts: Graph contains wrong number of nodes: * Constraint 1: "(\\d+(\\s){2}(VectorCastH2F.*)+(\\s){2}===.*)" - Failed comparison: [found] 0 > 0 [given] - No nodes matched! 2) Method "public void compiler.vectorization.TestFloatConversionsVector.test_float_float16(short[],float[])" - [Failed IR rules: 1]: * @IR rule 1: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={DEFAULT}, applyIf={}, applyIfCPUFeatureOr={"avx512f", "true", "f16c", "true"}, applyIfCPUFeature={}, counts={"_#VECTOR_CAST_F2H#_", "> 0"}, applyIfAnd={}, failOn={}, applyIfOr={}, applyIfNot={})" > Phase "PrintIdeal": - counts: Graph contains wrong number of nodes: * Constraint 1: "(\\d+(\\s){2}(VectorCastF2H.*)+(\\s){2}===.*)" - Failed comparison: [found] 0 > 0 [given] - No nodes matched!

07-12-2022

A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/11471 Date: 2022-12-02 04:22:39 +0000

02-12-2022

Relates :	JDK-8289552 - Make intrinsic conversions between bit representations of half precision values and floats
Relates :	JDK-8299038 - Add AArch64 backend support for auto-vectorized FP16 conversions
Relates :	JDK-8333890 - Fatal error in auto-vectorizer with float16 kernel.