Vector operators

This MR extends the HOG to enable the generation of vector-vector operators using the tensorial vector function spaces.

Those are relevant for two reasons:

• communication patterns should improve compared to "block-scalar" operators
• enables the implementation of certain forms that are not possible or at least complicated with scalar operators (e.g., Nitsche + free-slip BCs)

Still WIP until the following points are resolved:

• P1 support (first 2D results are looking good)
• P2 support
• 3D
• automated testing
• viscous ops with blending should be tested to make sure the full feature set is covered
• cleanup (check duplicated code in hyteg-coupling, forms, ...)

hyteg_integration_tests/src/CMakeLists.txt

@@ -54,10 +54,12 @@ add_operator_test(FILE DivKGrad.cpp DEF TEST_ASSEMBLE FORM DivKGrad ABBR noopts
 add_operator_test(FILE DivKGrad.cpp                   FORM DivKGrad ABBR VIQ    GEN_ARGS -s P2 --quad-degree 4 4 -o MOVECONSTANTS VECTORIZE QUADLOOPS )
 add_operator_test(FILE DivKGrad.cpp DEF TEST_ASSEMBLE FORM DivKGrad ABBR IQT    GEN_ARGS -s P2 --quad-degree 4 4 -o MOVECONSTANTS QUADLOOPS TABULATE )
 
-add_operator_test(FILE Div.cpp  DEF REF_OP=P2ToP1ElementwiseDivxOperator  FORM Div_0  ABBR VIQT GEN_ARGS -s P2 -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 2 2)
-add_operator_test(FILE DivT.cpp DEF REF_OP=P1ToP2ElementwiseDivTzOperator FORM DivT_2 ABBR VIQT GEN_ARGS -s P2 -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 2 2)
-add_operator_test(FILE Epsilon.cpp DEF TEST_DIAG FORM=forms::p2_epsilonvar_0_0_affine_q4 FORM Epsilon_0_0 ABBR 00VIQT GEN_ARGS -s P2 -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 4 4)
-add_operator_test(FILE Epsilon.cpp DEF           FORM=forms::p2_epsilonvar_2_1_affine_q4 FORM Epsilon_2_1 ABBR 21VIQT GEN_ARGS -s P2 -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 4 4)
+add_operator_test(FILE Div.cpp  DEF REF_OP=P2ToP1ElementwiseDivxOperator  FORM Div_0  ABBR VIQT GEN_ARGS -s P2ToP1 -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 2 2)
+add_operator_test(FILE DivT.cpp DEF REF_OP=P1ToP2ElementwiseDivTzOperator FORM DivT_2 ABBR VIQT GEN_ARGS -s P1ToP2 -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 2 2)
+
+add_operator_test(FILE Epsilon.cpp       DEF TEST_DIAG FORM=forms::p2_epsilonvar_0_0_affine_q4 FORM Epsilon_0_0 ABBR 00VIQT  GEN_ARGS -s P2       -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 4 4)
+add_operator_test(FILE Epsilon.cpp       DEF           FORM=forms::p2_epsilonvar_2_1_affine_q4 FORM Epsilon_2_1 ABBR 21VIQT  GEN_ARGS -s P2       -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 4 4)
+add_operator_test(FILE EpsilonVector.cpp DEF           FORM Epsilon                                             ABBR VecVIQT GEN_ARGS -s P2Vector -o MOVECONSTANTS QUADLOOPS TABULATE VECTORIZE --quad-degree 4 4)
 
 # tests with blending