Bug ID: JDK-8295351 java/lang/Float/Binary16Conversion.java fails with "Unexpected result of converting"

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JDK 20
20 b26Fixed

The following test failed in the JDK20 CI:

java/lang/Float/Binary16Conversion.java

Here's a snippet from the log file:

#section:main
----------messages:(7/234)----------
command: main Binary16Conversion
reason: User specified action: run main Binary16Conversion 
started: Fri Oct 14 00:25:20 UTC 2022
Mode: agentvm
Agent id: 22
finished: Fri Oct 14 00:25:21 UTC 2022
elapsed time (seconds): 0.773
----------configuration:(14/1341)*----------

<snip>

----------System.out:(10/791)----------
Unexpected result of converting 0x1.1dff7ep30 to short. Expected 0x7bff got 0x7c00
Unexpected result of converting -0x1.1dff7ep30 to short. Expected 0xfbff got 0xfc00
Unexpected result of converting 0x1.1dff8p30 to short. Expected 0x7bff got 0x7c00
Unexpected result of converting -0x1.1dff8p30 to short. Expected 0xfbff got 0xfc00
Unexpected result of converting 0x1.1dff82p30 to short. Expected 0x7bff got 0x7c00
Unexpected result of converting -0x1.1dff82p30 to short. Expected 0xfbff got 0xfc00
Unexpected result of converting 0x1.1dff7ep30 to short. Expected 0x7bff got 0x7c00
Unexpected result of converting -0x1.1dff7ep30 to short. Expected 0xfbff got 0xfc00
Round-to-nearest violation on converting 0x1.0p0 to binary16 and back.
Different conversion of float value 0x1.0p1
----------System.err:(10/531)----------
java.lang.RuntimeException: 10 errors
	at Binary16Conversion.main(Binary16Conversion.java:47)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
	at java.base/java.lang.reflect.Method.invoke(Method.java:578)
	at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:312)
	at java.base/java.lang.Thread.run(Thread.java:1591)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test

result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: 10 errors

The fix for this bug is integrated in jdk-20+26-1972.
28-11-2022
Changeset: 105d9d75 Author: Smita Kamath <svkamath@openjdk.org> Committer: Sandhya Viswanathan <sviswanathan@openjdk.org> Date: 2022-11-28 19:24:25 +0000 URL: https://git.openjdk.org/jdk/commit/105d9d75e84a46400f52fafda2ea00c99c14eaf0
28-11-2022
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/11301 Date: 2022-11-22 21:52:59 +0000
23-11-2022
[~kvn] Thanks, I will take a look at it.
17-10-2022
ILW = Conversion error of floats, single test, no workaround = HLH = P2
17-10-2022
[~svkamath] Please, look on this failure. It is regression after your latest changes. It reproduces easy with `-Xcomp -XX:-TieredCompilation` flags.
15-10-2022
Test passed after reverting JDK-8289552 changes
15-10-2022
[~alanb] - Thanks I was just going to suggest moving this to hotspot/compiler since it only fails in -Xcomp mode.
15-10-2022
It fails with -Xcomp -XX:CompileThreshold=100 -XX:-TieredCompilation but passing if the newly added intrinsics are disabled with -XX:DisableIntrinsic=_float16ToFloat,_floatToFloat16. So I assume related to JDK-8289552 so I will move to hotspot/compiler.
15-10-2022