SIMD support for comparison operations

[Shahrzad Shirzad]

Hi Klaus,

I don't believe blaze supports SIMD implementation of comparison operations right now. If I'm right, is it something you could consider to add to blaze?

Thanks, Shahrzad

[Klaus Iglberger]

Hi Shahrzad!

Thanks a lot for creating this issue. You are correct, Blaze currently does not support SIMD comparison operations. We agree that this is an important feature, which has been on our list for quite some time. We apologize that we haven't found the time to integrate this yet. Thanks again for creating this issue, which will serve as a reminder for us.

Best regards,

Klaus!

[Klaus Iglberger]

Summary

The feature has been implemented, tested, and optimized as required. It is immediately available via cloning the Blaze repository and will be officially released in Blaze 3.4.

Details

SIMD optimized equality and inequality comparison is now used whenever two dense vectors or matrices are compared via operator==(), operator!=() or the equal() function:

blaze::DynamicVector<double> a;
blaze::DynamicVector<double> b;
// ... Resizing and initialization

if( a == b )  // Uses SIMD optimized equality comparison
{ ... }

blaze::DynamicMatrix<double> A;
blaze::DynamicMatrix<double> B;
// ... Resizing and initialization

if( A != B )  // Uses SIMD optimized inequality comparison
{ ... }