On Thu, 3 Jun 2021 00:29:00 GMT, Sandhya Viswanathan <sviswanat...@openjdk.org>
wrote:
> The Vector API toShuffle method can be optimized using existing vector
> conversion intrinsic.
>
> The following changes are made:
> 1) vector.toShuffle java implementation is changed to call
> VectorSupport.convert.
> 2) The conversion intrinsic (inline_vector_convert()) in vectorIntrinsics.cpp
> is changed to allow shuffle as a destination type.
> 3) The shuffle.toVector intrinsic (inline_vector_shuffle_to_vector()) in
> vectorIntrinsics.cpp now explicitly generates conversion node instead of
> performing conversion during unbox. This is to remove unnecessary boxing
> during back to back vector.toShuffle and shuffle.toVector calls.
>
> Best Regards,
> Sandhya
src/jdk.incubator.vector/share/classes/jdk/incubator/vector/Byte128Vector.java
line 335:
> 333: @ForceInline
> 334: private final
> 335: VectorShuffle<Byte> toShuffleTemplate(AbstractSpecies<Byte> dsp) {
Is it better to move this template method to the super class like other APIs?
src/jdk.incubator.vector/share/classes/jdk/incubator/vector/Byte128Vector.java
line 350:
> 348: Byte128Shuffle.class, byte.class,
> VLENGTH,
> 349: this, VSPECIES,
> 350: Byte128Vector::toShuffleTemplate);
ditto
-------------
PR: https://git.openjdk.java.net/jdk/pull/4326
