[ONNX] Add CumSum operator to ONNX frontend

include/tvm/relay/attrs/transform.h

@@ -442,9 +442,13 @@ struct MatrixSetDiagAttrs : public tvm::AttrsNode<MatrixSetDiagAttrs> {
 struct CumsumAttrs : public tvm::AttrsNode<CumsumAttrs> {
   Integer axis;
   DataType dtype;
+  Integer exclusive;
   TVM_DECLARE_ATTRS(CumsumAttrs, "relay.attrs.CumsumAttrs") {
     TVM_ATTR_FIELD(axis).describe("The axis to sum over").set_default(NullValue<Integer>());
     TVM_ATTR_FIELD(dtype).describe("Output data type").set_default(NullValue<DataType>());
+    TVM_ATTR_FIELD(exclusive)
+        .describe("The top element is not included")
+        .set_default(NullValue<Integer>());
   }
 };
 

python/tvm/relay/frontend/onnx.py

@@ -34,7 +34,7 @@
 from .. import ty as _ty
 
 from .common import AttrCvt, Renamer
-from .common import get_relay_op, new_var, infer_shape, infer_channels
+from .common import get_relay_op, new_var, infer_shape, infer_channels, infer_value
 from .common import infer_type, get_name
 
 
@@ -1075,6 +1075,28 @@ def _impl_v1(cls, inputs, attr, params):
         return _op.shape_of(inputs[0], "int64")
 
 
+class CumSum(OnnxOpConverter):
+    """Operator converter for CumSum."""
+
+    @classmethod
+    def _impl_v1(cls, inputs, attr, params):
+        data = inputs[0]
+        dim = inputs[1]
+
+        if dim is not None:
+            dim = int(infer_value(dim, params).asnumpy())
+
+        exclusive = attr.get("exclusive", 0)
+        reverse = attr.get("reverse", 0)
+
+        if reverse != 0:
+            out = _op.reverse(data, axis=dim)
+            out = _op.cumsum(out, axis=dim, exclusive=exclusive)
+            return _op.reverse(out, axis=dim)
+
+        return _op.cumsum(data, axis=dim, exclusive=exclusive)
+
+
 class Cast(OnnxOpConverter):
     """Operator converter for Cast."""
 
@@ -2736,6 +2758,7 @@ def _get_convert_map(opset):
         "Resize": Resize.get_converter(opset),
         "NonZero": NonZero.get_converter(opset),
         "Range": Range.get_converter(opset),
+        "CumSum": CumSum.get_converter(opset),
         # defs/control_flow
         "Loop": Loop.get_converter(opset),
         "If": If.get_converter(opset),

python/tvm/relay/op/_transform.py

@@ -116,7 +116,7 @@ def compute_scatter_nd(attrs, inputs, output_type):
 @_reg.register_compute("cumsum")
 def compute_cumsum(attrs, inputs, output_type):
     """Compute definition of cumsum"""
-    return [topi.cumsum(inputs[0], attrs.axis, attrs.dtype)]
+    return [topi.cumsum(inputs[0], attrs.axis, attrs.dtype, attrs.exclusive)]
 
 
 _reg.register_strategy("cumsum", strategy.cumsum_strategy)

python/tvm/relay/op/strategy/generic.py

@@ -1367,7 +1367,7 @@ def wrap_compute_cumsum(topi_compute):
     """Wrap cumsum topi compute"""
 
     def _compute_cumsum(attrs, inputs, _):
-        return [topi_compute(inputs[0], attrs.axis, attrs.dtype)]
+        return [topi_compute(inputs[0], attrs.axis, attrs.dtype, attrs.exclusive)]
 
     return _compute_cumsum
 

python/tvm/relay/op/transform.py

@@ -1322,7 +1322,7 @@ def adv_index(inputs):
     return _make.adv_index(Tuple(inputs))
 
 
-def cumsum(data, axis=None, dtype=None):
+def cumsum(data, axis=None, dtype=None, exclusive=None):
     """Numpy style cumsum op. Return the cumulative inclusive sum of the elements along
     a given axis.
 
@@ -1339,6 +1339,12 @@ def cumsum(data, axis=None, dtype=None):
         Type of the returned array and of the accumulator in which the elements are summed.
         If dtype is not specified, it defaults to the dtype of data.
 
+    exclusive : int, optional
+        If set to 1 will return exclusive sum in which the top element is not
+        included. In other terms, if set to 1, the j-th output element would be
+        the sum of the first (j-1) elements. Otherwise, it would be the sum of
+        the first j elements.
+
     Returns
     -------
     result : relay.Expr
@@ -1368,4 +1374,4 @@ def cumsum(data, axis=None, dtype=None):
         cumsum(a, dtype=int32)  # dtype should be provided to get the expected results
         -> [1, 1, 2, 2, 3, 4, 4]
     """
-    return _make.cumsum(data, axis, dtype)
+    return _make.cumsum(data, axis, dtype, exclusive)

python/tvm/topi/cuda/scan.py

@@ -488,7 +488,7 @@ def traverse(op):
     return s
 
 
-def cumsum(data, axis=None, dtype=None):
+def cumsum(data, axis=None, dtype=None, exclusive=None):
     """Numpy style cumsum op. Return the cumulative sum of the elements along a given axis.
 
     Parameters
@@ -504,6 +504,12 @@ def cumsum(data, axis=None, dtype=None):
         Type of the returned array and of the accumulator in which the elements are summed.
         If dtype is not specified, it defaults to the dtype of data.
 
+    exclusive : int, optional
+        If set to 1 will return exclusive sum in which the top element is not
+        included. In other terms, if set to 1, the j-th output element would be
+        the sum of the first (j-1) elements. Otherwise, it would be the sum of
+        the first j elements.
+
     Returns
     -------
     result : tvm.te.Tensor
@@ -514,4 +520,6 @@ def cumsum(data, axis=None, dtype=None):
         axis = 0
         data = reshape(data, (prod(data.shape),))
     axis = get_const_int(axis)
+    if exclusive is not None and exclusive != 0:
+        return exclusive_scan(data, axis, output_dtype=dtype, binop=tvm.tir.generic.add)
     return inclusive_scan(data, axis, output_dtype=dtype, binop=tvm.tir.generic.add)

python/tvm/topi/cumsum.py

@@ -22,7 +22,7 @@
 from .math import cast
 
 
-def cumsum(data, axis=None, dtype=None):
+def cumsum(data, axis=None, dtype=None, exclusive=None):
     """Numpy style cumsum op. Return the cumulative sum of the elements along a given axis.
 
     Parameters
@@ -38,6 +38,12 @@ def cumsum(data, axis=None, dtype=None):
         Type of the returned array and of the accumulator in which the elements are summed.
         If dtype is not specified, it defaults to the dtype of data.
 
+    exclusive : int, optional
+        If set to 1 will return exclusive sum in which the top element is not
+        included. In other terms, if set to 1, the j-th output element would be
+        the sum of the first (j-1) elements. Otherwise, it would be the sum of
+        the first j elements.
+
     Returns
     -------
     result : tvm.te.Tensor
@@ -75,6 +81,9 @@ def maybe_cast(x):
             elif i > axis:
                 axis_mul_after *= value
 
+    if exclusive is None:
+        exclusive = 0
+
     def gen_ir(data_buf, out_buf):
         ib = ir_builder.create()
         data_buf = ib.buffer_ptr(data_buf)
@@ -84,12 +93,18 @@ def gen_ir(data_buf, out_buf):
             i = fused // axis_mul_after
             j = fused % axis_mul_after
             base_idx = i * cumsum_axis_len * axis_mul_after + j
-            out_buf[base_idx] = maybe_cast(data_buf[base_idx])
+            if exclusive == 0:
+                out_buf[base_idx] = maybe_cast(data_buf[base_idx])
+            else:
+                out_buf[base_idx] = 0.0
             with ib.for_range(0, cumsum_axis_len - 1, "_k") as _k:
                 k = _k + 1
                 cur_idx = base_idx + k * axis_mul_after
                 prev_idx = base_idx + (k - 1) * axis_mul_after
-                out_buf[cur_idx] = out_buf[prev_idx] + maybe_cast(data_buf[cur_idx])
+                if exclusive == 0:
+                    out_buf[cur_idx] = out_buf[prev_idx] + maybe_cast(data_buf[cur_idx])
+                else:
+                    out_buf[cur_idx] = out_buf[prev_idx] + maybe_cast(data_buf[prev_idx])
 
         return ib.get()
 

src/relay/op/tensor/transform.cc

@@ -3705,10 +3705,11 @@ bool CumsumRel(const Array<Type>& types, int num_inputs, const Attrs& attrs,
   return true;
 }
 
-Expr MakeCumsum(Expr data, Integer axis, DataType dtype) {
+Expr MakeCumsum(Expr data, Integer axis, DataType dtype, Integer exclusive) {
   auto attrs = make_object<CumsumAttrs>();
   attrs->dtype = dtype;
   attrs->axis = axis;
+  attrs->exclusive = exclusive;
   static const Op& op = Op::Get("cumsum");
   return Call(op, {data}, Attrs(attrs), {});
 }

tests/python/frontend/onnx/test_forward.py

@@ -3964,6 +3964,69 @@ def verify_softplus(indata):
     verify_softplus(input_data)
 
 
+def test_cumsum():
+    def verify_cumsum(indata, axis, exclusive=0, reverse=0):
+        cumsum_node = onnx.helper.make_node(
+            "CumSum",
+            inputs=["X", "axis"],
+            outputs=["Y"],
+        )
+        if exclusive != 0:
+            exclusive_attr = helper.make_attribute("exclusive", exclusive)
+            cumsum_node.attribute.append(exclusive_attr)
+        if reverse != 0:
+            reverse_attr = helper.make_attribute("reverse", reverse)
+            cumsum_node.attribute.append(reverse_attr)
+        nodes = [
+            make_constant_node("axis", onnx.TensorProto.INT32, [1], [axis]),
+            cumsum_node,
+        ]
+
+        graph = helper.make_graph(
+            nodes,
+            "cumsum_test",
+            inputs=[
+                helper.make_tensor_value_info("X", TensorProto.FLOAT, list(indata.shape)),
+            ],
+            outputs=[helper.make_tensor_value_info("Y", TensorProto.FLOAT, list(indata.shape))],
+        )
+
+        model = helper.make_model(graph, producer_name="cumsum_test")
+
+        verify_with_ort_with_inputs(model, [indata], dtype="float32", use_vm=True, opset=11)
+
+    data = (
+        np.array(
+            [
+                1.0,
+                2.0,
+                3.0,
+                4.0,
+                5.0,
+                6.0,
+                7.0,
+                8.0,
+                9.0,
+                10.0,
+                11.0,
+                12.0,
+            ]
+        )
+        .astype(np.float32)
+        .reshape((3, 4))
+    )
+
+    verify_cumsum(data, 0)
+    verify_cumsum(data, 1)
+    verify_cumsum(data, 0, 1, 0)
+    verify_cumsum(data, 1, 1, 0)
+    verify_cumsum(data, 0, 0, 1)
+    verify_cumsum(data, 1, 0, 1)
+    verify_cumsum(data, 1, 1, 1)
+    data = np.random.randn(1, 32, 32, 3).astype("float32")
+    verify_cumsum(data, 1)
+
+
 if __name__ == "__main__":
     test_flatten()
     test_reshape()
@@ -4040,3 +4103,4 @@ def verify_softplus(indata):
     test_size()
     test_maxunpool()
     test_softplus()
+    test_cumsum()