RFR: 8256267: Relax compiler/floatingpoint/NaNTest.java for x86_32 and lower -XX:+UseSSE

[Aleksey Shipilev]

On Thu, 12 Nov 2020 13:06:30 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Reproduces like this:
> 
> $ CONF=linux-x86-server-fastdebug make images run-test TEST=compiler/floatingpoint/NaNTest.java TEST_VM_OPTS="-XX:UseSSE=1"
> 
> STDOUT:
> ### NanTest started
> Written and read back float values match
> 0x7F800001 0x7F800001
> STDERR:
> java.lang.RuntimeException: Original and read back double values mismatch
> 0xFFF0000000000001 0xFFF8000000000001
> 
> at compiler.floatingpoint.NaNTest.testDouble(NaNTest.java:56)
> at compiler.floatingpoint.NaNTest.main(NaNTest.java:69)
> 
> After reading through [JDK-8076373](https://bugs.openjdk.java.net/browse/JDK-8076373), I think the test cannot be expected to pass without SSE >= 2 for doubles, and SSE >= 1 for floats on x86_32. This change adds the platform and UseSSE sensing to test.
> 
> Additional testing:
>  - [x] Affected test on Linux x86_32 with `-XX:UseSSE={0,1,2}`
>  - [x] Affected test on Linux x86_64 with `-XX:UseSSE={0,1,2}`
>  - [x] Affected test on Linux AArch64

Anyone? :)

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PR: https://git.openjdk.java.net/jdk/pull/1187