JDK-8362207 : Add more test cases for possible double-rounding in fma
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.lang
  • Affected Version: 26
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2025-07-15
  • Updated: 2025-09-26
  • Resolved: 2025-07-16
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JDK 11 JDK 17 JDK 21 JDK 25 JDK 26
11.0.30-oracleFixed 17.0.18-oracleFixed 21.0.10-oracleFixed 25.0.2Fixed 26 b07Fixed
Related Reports
Relates :  
JDK-8253409 - Double-rounding possibility in float fma
Relates :  
JDK-4851642 - Add fused multiply add to Java math library
Relates :  
JDK-8341260 - Add Float16 to jdk.incubator.vector
Description
From discussions related to IEEE 754, a few explicit test cases were identified where plausible, but incorrect, implementations of fma using higher precision. These test cases are useful to include in the regression tests of the float-precision and Float16-precision fused multiple add methods.
Comments
Fix request [21u] I backport this for parity with 21.0.10-oracle. No risk, only a test change Resolved. One modified test not in 21. Test passes. SAP nightly testing passed.
21-09-2025
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk21u-dev/pull/2240 Date: 2025-09-19 08:20:16 +0000
19-09-2025
[jdk25u-fix-request] Approval Request from Abhishek N Backporting the changes to 25u repo
20-08-2025
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk25u/pull/114 Date: 2025-08-20 06:47:15 +0000
20-08-2025
Changeset: 6e368e0c Branch: master Author: Joe Darcy <darcy@openjdk.org> Date: 2025-07-16 05:48:19 +0000 URL: https://git.openjdk.org/jdk/commit/6e368e0c696bc9b2118014937aa2e091ea662985
16-07-2025
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/26305 Date: 2025-07-15 01:10:05 +0000
15-07-2025