add scatter op

src/CMakeLists.txt

@@ -144,6 +144,7 @@ register_migraphx_ops(
     round
     rsqrt
     scalar
+    scatter
     sigmoid
     sign
     sinh

src/include/migraphx/op/scatter.hpp

+#ifndef MIGRAPHX_GUARD_OPERATORS_SCATTER_HPP
+#define MIGRAPHX_GUARD_OPERATORS_SCATTER_HPP
+
+#include <array>
+#include <migraphx/check_shapes.hpp>
+#include <migraphx/stringutils.hpp>
+#include <migraphx/streamutils.hpp>
+#include <migraphx/shape_for_each.hpp>
+#include <migraphx/config.hpp>
+#include <migraphx/value.hpp>
+#include <migraphx/op/normalize_attribute.hpp>
+#include <cmath>
+#include <utility>
+
+namespace migraphx {
+inline namespace MIGRAPHX_INLINE_NS {
+namespace op {
+
+struct scatter
+{
+    int64_t axis = 0;
+
+    template <class Self, class F>
+    static auto reflect(Self& self, F f)
+    {
+        return pack(f(self.axis, "axis"));
+    }
+
+    value attributes() const
+    {
+        value normalize;
+        normalize["axis"] = value::array{normalize_attribute::include_min};
+        return {{"normalize_axes", normalize}};
+    }
+
+    std::string name() const { return "scatter"; }
+
+    shape normalize_compute_shape(std::vector<shape> inputs) const
+    {
+        check_shapes{inputs, *this}.has(3).standard();
+        return inputs.front();
+    }
+
+    argument compute(const shape& output_shape, std::vector<argument> args) const
+    {
+        argument result{output_shape};
+        // max dimension in axis
+        visit_all(result, args[0], args[2])([&](auto output, auto data, auto update) {
+            std::copy(data.begin(), data.end(), output.begin());
+            args[1].visit([&](auto indices) {
+                auto ind_s = indices.get_shape();
+                shape_for_each(ind_s, [&](const auto& idx) {
+                    auto out_idx = idx;
+                    out_idx[axis] = indices[ind_s.index(idx)];
+                    output[output_shape.index(out_idx)] = update[ind_s.index(idx)];
+                });
+            });
+        });
+
+        return result;
+    }
+};
+
+} // namespace op
+} // namespace MIGRAPHX_INLINE_NS
+} // namespace migraphx
+
+#endif

src/include/migraphx/operators.hpp

@@ -80,6 +80,7 @@
 #include <migraphx/op/round.hpp>
 #include <migraphx/op/rsqrt.hpp>
 #include <migraphx/op/scalar.hpp>
+#include <migraphx/op/scatter.hpp>
 #include <migraphx/op/sigmoid.hpp>
 #include <migraphx/op/sign.hpp>
 #include <migraphx/op/sinh.hpp>

src/onnx/parse_generic_op.cpp

@@ -35,6 +35,7 @@ struct parse_generic_op : op_parser<parse_generic_op>
                 {"Reciprocal", "recip"},
                 {"Relu", "relu"},
                 {"Round", "round"},
+                {"Scatter", "scatter"},
                 {"Sigmoid", "sigmoid"},
                 {"Sign", "sign"},
                 {"Sin", "sin"},