RFR: 8361582: AArch64: Some ConH values cannot be replicated with SVE [v4]

[Bhavana Kilambi]

On Mon, 11 Aug 2025 09:11:24 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Bhavana Kilambi has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Addressed review comments and modified some comments
>
> test/hotspot/jtreg/compiler/c2/aarch64/TestFloat16Replicate.java line 45:
> 
>> 43: public class TestFloat16Replicate {
>> 44:     private static short[] input;
>> 45:     private static short[] output;
> 
> This might give things even more chance to vectorize? Not sure, feel free to ignore.
> 
> Suggestion:
> 
>     private static final short[] INPUTE;
>     private static final short[] OUTPUT;

I hope it's ok to not add these changes to the code. The loops are getting vectorized fine and the tests do pass on aarch64 and x86. I will consider this if there's any issue with auto vectorization in the futurre. Thanks

> test/hotspot/jtreg/compiler/c2/aarch64/TestFloat16Replicate.java line 47:
> 
>> 45:     private static short[] output;
>> 46: 
>> 47:    // Choose FP16_IN_RANGE which is within the range of [-128 << 8, 127 << 8] and a multiple of 256
> 
> Suggestion:
> 
>     // Choose FP16_IN_RANGE which is within the range of [-128 << 8, 127 << 8] and a multiple of 256

Done

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/26589#discussion_r2272848883
PR Review Comment: https://git.openjdk.org/jdk/pull/26589#discussion_r2272845319