Added Astaroth 2.0

acc/samples/sample_stencil_assembly.sas

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+// TODO comments and reformatting
+
+//Scalar
+//dostuff(in Scalar uux)
+//{
+//   return uux[vertexIdx.x, vertexIdx.y, vertexIdx.z];
+//}
+
+// stencil_assembly.in
+Preprocessed Scalar
+some_exotic_stencil_computation(in Scalar uux)
+{
+    //#if STENCIL_ORDER == 2
+    //    const Scalar coefficients[] = {1, 1, 1};
+    //#else if STENCIL_ORDER == 4
+    //    const Scalar coefficients[] = {....};
+    //#endif
+
+    int i = vertexIdx.x;
+    int j = vertexIdx.y;
+    int k = vertexIdx.z;
+    const Scalar coefficients[] = {1, 2, 3};
+
+    return coefficients[0] * uux[i-1, j, k] + 
+           coefficients[1] * uux[i, j, k] + 
+           coefficients[2] * uux[i+1, j, k];
+}
+
+// stencil_process.in
+//in Scalar uux_in = VTXBUF_UUX;
+//out Scalar uux_out = VTXBUF_UUX;
+
+
+//Kernel
+//solve(Scalar dt)
+//{
+//    uux_out = some_exotic_stencil(uux_in);
+//}
+
+
+
+
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+