RFR: 8263904: compiler/intrinsics/bmi/verifycode/BzhiTestI2L.java fails on x86_32

Mon Mar 22 17:50:00 UTC 2021

On Mon, 22 Mar 2021 17:30:31 GMT, Marcus G K Williams <github.com+168222+mgkwill at openjdk.org> wrote:

> Further fixes (in addition to https://github.com/openjdk/jdk/pull/3104) for issue where BzhiTestI2L.java fails on x86_32.  bzhiq instructions are only generated on x86_64.
> 
> This adds a skip to the test if `Platform.isX86()` and uses `((BmiTestCase) testCase).getTestCaseX64() && Platform.isX64()` to decide when to use `((BmiTestCase_x64) testCase).getInstrPattern_x64()` versus `((BmiTestCase) testCase).getInstrPattern()` (x86_32 version of instruction)
> 
> Signed-off-by: Marcus G K Williams <marcus.williams at intel.com>

> @mgkwill do you have plan to implement this optimization on 32-bit x86?

Not originally but I'm looking at it now.

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PR: https://git.openjdk.java.net/jdk/pull/3128