From 51ddadc51717ce6b2388b7e16f7160155ca6ce8e Mon Sep 17 00:00:00 2001
From: Atell Krasnopolski <delta_atell@protonmail.com>
Date: Mon, 2 Sep 2024 17:03:36 +0200
Subject: [PATCH] Add 1d indexing

---
 include/clad/Differentiator/KokkosBuiltins.h | 26 ++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/include/clad/Differentiator/KokkosBuiltins.h b/include/clad/Differentiator/KokkosBuiltins.h
index c205cf9c1..e050a0fd1 100644
--- a/include/clad/Differentiator/KokkosBuiltins.h
+++ b/include/clad/Differentiator/KokkosBuiltins.h
@@ -48,6 +48,19 @@ constructor_reverse_forw(
           ::Kokkos::View<DataType, ViewParams...>(
               "_diff_" + name, idx0, idx1, idx2, idx3, idx4, idx5, idx6, idx7)};
 }
+template <class DataType, class... ViewParams>
+void constructor_pullback(::Kokkos::View<DataType, ViewParams...>* v,
+                          const ::std::string& name, const size_t& idx0,
+                          const size_t& idx1, const size_t& idx2,
+                          const size_t& idx3, const size_t& idx4,
+                          const size_t& idx5, const size_t& idx6,
+                          const size_t& idx7,
+                          ::Kokkos::View<DataType, ViewParams...>* d_v,
+                          const ::std::string* /*d_name*/,
+                          const size_t& /*d_idx0*/, const size_t* /*d_idx1*/,
+                          const size_t* /*d_idx2*/, const size_t* /*d_idx3*/,
+                          const size_t* /*d_idx4*/, const size_t* /*d_idx5*/,
+                          const size_t* /*d_idx6*/, const size_t* /*d_idx7*/) {}
 
 /// View indexing
 template <typename View, typename Idx>
@@ -125,6 +138,19 @@ operator_call_pushforward(const View* v, Idx0 i0, Idx1 i1, Idx2 i2, Idx3 i3,
   return {(*v)(i0, i1, i2, i3, i4, i5, i6, i7),
           (*d_v)(i0, i1, i2, i3, i4, i5, i6, i7)};
 }
+template <class DataType, class... ViewParams, typename Idx>
+clad::ValueAndAdjoint<double&, double&> operator_call_reverse_forw(
+    const ::Kokkos::View<DataType, ViewParams...>* v, Idx i0,
+    const ::Kokkos::View<DataType, ViewParams...>* d_v, Idx /*d_i0*/) {
+  return {(*v)(i0), (*d_v)(i0)};
+}
+template <class DataType, class... ViewParams, typename Diff, typename Idx>
+void operator_call_pullback(const ::Kokkos::View<DataType, ViewParams...>* v,
+                            Idx i0, Diff d_y,
+                            ::Kokkos::View<DataType, ViewParams...>* d_v,
+                            Idx* /*d_i0*/) {
+  (*d_v)(i0) += d_y;
+}
 } // namespace class_functions
 
 /// Kokkos functions (view utils)