[SM6.9] Templated Load and Store long vectors from and to raw buffer types

[pow2clk]

Vectors of length greater than 4 should be loadable from ByteAddressBuffers and StructuredBuffers using the standard Load and Store methods. These are the templated methods in the case of ByteAddressBuffer. In SM 6.9, such loaded/stored vectors of over 1 element should generate rawBufferVectorLoad and rawBufferVectorStore DXIL intrinsics that operate on whole vectors rather than the previous 4 component at a time blocks.

Testing should be in the form of loading types with various shapes and element types involving vectors ranging from 1 to 1024 (though not inclusive) using the different load and store methods. This should include

• long vectors directly
• vectors as members of structs that are not the first element (requires valid offset loading)
• arrays of long vectors
• array of structs containing vectors
• struct of arrays containing vectors