RFR: 8320448: Accelerate IndexOf using AVX2 [v25]

[Scott Gibbons]

On Wed, 22 May 2024 18:22:24 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

>> Scott Gibbons has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   un-helper-ize preload_needle_helper; try fix for macos build
>
> src/hotspot/cpu/x86/stubGenerator_x86_64_string.cpp line 101:
> 
>> 99:   if (isU) {                 \
>> 100:     __ blsrl(tmp, mask);     \
>> 101:     __ blsrl(mask, tmp);     \
> 
> We could do this as 
>   __ blsrl(mask, mask);     \
>   __ blsrl(mask, mask);     \
> Thereby removing the need for tmp.

Fixed.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/16753#discussion_r1614127638