Added Astaroth 2.0

acc/mhd_solver/stencil_assembly.sas

@@ -0,0 +1,26 @@
+
+Preprocessed Scalar
+value(in Scalar vertex)
+{
+    return vertex[vertexIdx];
+}
+
+Preprocessed Vector
+gradient(in Scalar vertex)
+{
+    return (Vector){derx(vertexIdx, vertex),
+                    dery(vertexIdx, vertex),
+                    derz(vertexIdx, vertex)};
+}
+
+Preprocessed Matrix
+hessian(in Scalar vertex)
+{
+    Matrix hessian;
+
+    hessian.row[0] = (Vector){derxx(vertexIdx, vertex), derxy(vertexIdx, vertex), derxz(vertexIdx, vertex)};
+    hessian.row[1] = (Vector){hessian.row[0].y,       deryy(vertexIdx, vertex), deryz(vertexIdx, vertex)};
+    hessian.row[2] = (Vector){hessian.row[0].z,       hessian.row[1].z,       derzz(vertexIdx, vertex)};
+
+    return hessian;
+}