RFR: 8329077: C2 SuperWord: Add MoveD2L, MoveL2D, MoveF2I, MoveI2F [v3]

[Emanuel Peter]

On Wed, 20 Aug 2025 11:58:25 GMT, Galder Zamarreño <galder at openjdk.org> wrote:

>> Hi, as you mostly touched the auto-vectorization part of c2, could you please run these float16 tests as well (most of these enable auto-vectorization for Float16) - 
>> 
>> `compiler/vectorization/TestFloat16VectorOperations.java`
>> `compiler/vectorization/TestFloatConversionsVectorNaN.java`
>> `compiler/vectorization/TestFloatConversionsVector.java`
>> `compiler/vectorization/TestFloat16ToFloatConv.java`
>> `compiler/vectorization/TestFloat16VectorConvChain.java`
>> `compiler/intrinsics/float16/*`
>
> @Bhavana-Kilambi I've run these tests:
> 
> 
>   "test/hotspot/jtreg/compiler/c2/irTests/ConvF2HFIdealizationTests.java"
>   "test/hotspot/jtreg/compiler/c2/irTests/TestFloat16ScalarOperations.java"
>   "test/hotspot/jtreg/compiler/intrinsics/float16/*"
>   "test/hotspot/jtreg/compiler/vectorization/TestFloat16ToFloatConv.java"
>   "test/hotspot/jtreg/compiler/vectorization/TestFloat16VectorConvChain.java"
>   "test/hotspot/jtreg/compiler/vectorization/TestFloat16VectorOperations.java"
>   "test/hotspot/jtreg/compiler/vectorization/TestFloatConversionsVector.java"
>   "test/hotspot/jtreg/compiler/vectorization/TestFloatConversionsVectorNaN.java"
> 
> 
> On x86:
> 
> Test results: passed: 11; did not meet platform requirements: 1
> (TestFloatConversionsVectorNaN is for riscv)
> 
> 
> On graviton 3 aarch64:
> 
> Test results: passed: 10; failed: 1; did not meet platform requirements: 1
> 
> 
> The failure on aarch64 is already existing issue [JDK-8361582](https://bugs.openjdk.org/browse/JDK-8361582)

@galderz Excellent, that's great :)

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PR Review Comment: https://git.openjdk.org/jdk/pull/26457#discussion_r2287967911