feat: added range onnx import

crates/burn-import/SUPPORTED-ONNX-OPS.md

@@ -134,7 +134,7 @@ represent the corresponding Burn Op.
 | [RandomNormalLike][127]          |       ❌       |      ✅      |
 | [RandomUniform][128]             |       ✅       |      ✅      |
 | [RandomUniformLike][129]         |       ❌       |      ✅      |
-| [Range][130]                     |       ❌       |      ✅      |
+| [Range][130]                     |       ✅       |      ✅      |
 | [Reciprocal][131]                |       ✅       |      ✅      |
 | [ReduceL][132]                   |       ❌       |      ❌      |
 | [ReduceLogSum][133]              |       ❌       |      ❌      |

crates/burn-import/onnx-tests/build.rs

@@ -75,6 +75,7 @@ fn main() {
         .input("tests/squeeze/squeeze_opset13.onnx")
         .input("tests/random_uniform/random_uniform.onnx")
         .input("tests/random_normal/random_normal.onnx")
+        .input("tests/range/range.onnx")
         .out_dir("model/")
         .run_from_script();
 

crates/burn-import/onnx-tests/tests/onnx_tests.rs

@@ -57,6 +57,7 @@ include_models!(
     less,
     less_or_equal,
     prelu,
+    range,
     recip,
     reduce_max,
     reduce_mean,
@@ -1070,6 +1071,21 @@ mod tests {
         output.to_data().assert_approx_eq(&expected, 4);
     }
 
+    #[test]
+    fn range() {
+        let device = Default::default();
+        let model: range::Model<Backend> = range::Model::new(&device);
+
+        // Run the model
+        let start = 0i64;
+        let limit = 10i64;
+        let delta = 2i64;
+        let output = model.forward(start, limit, delta);
+
+        let expected = Data::from([0, 2, 4, 6, 8]);
+        assert_eq!(output.to_data(), expected);
+    }
+
     #[test]
     fn recip() {
         // Initialize the model

crates/burn-import/onnx-tests/tests/range/range.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+# used to generate model: onnx-tests/tests/range/range.onnx
+
+import onnx
+from onnx import helper, TensorProto
+
+def main():
+    node = onnx.helper.make_node(
+        'Range',
+        name='range',
+        inputs=['start', 'end', 'step'],
+        outputs=['output']
+    )
+
+    graph_def = helper.make_graph(
+        nodes=[node],
+        name='RangeGraph',
+        inputs=[
+            helper.make_tensor_value_info('start', TensorProto.INT64, []),
+            helper.make_tensor_value_info('end', TensorProto.INT64, []),
+            helper.make_tensor_value_info('step', TensorProto.INT64, [])
+        ],
+        outputs=[
+            helper.make_tensor_value_info('output', TensorProto.INT64, [5])
+        ],
+    )
+
+    model_def = helper.make_model(graph_def, producer_name='range')
+
+    onnx.save(model_def, 'range.onnx')
+
+if __name__ == '__main__':
+    main()

crates/burn-import/src/burn/node/base.rs

@@ -6,8 +6,8 @@ use super::{
     global_avg_pool::GlobalAvgPoolNode, layer_norm::LayerNormNode, linear::LinearNode,
     mask_where::WhereNode, matmul::MatmulNode, max_pool1d::MaxPool1dNode,
     max_pool2d::MaxPool2dNode, prelu::PReluNode, random_normal::RandomNormalNode,
-    random_uniform::RandomUniformNode, reshape::ReshapeNode, squeeze::SqueezeNode,
-    unary::UnaryNode, unsqueeze::UnsqueezeNode,
+    random_uniform::RandomUniformNode, range::RangeNode, reshape::ReshapeNode,
+    squeeze::SqueezeNode, unary::UnaryNode, unsqueeze::UnsqueezeNode,
 };
 use crate::burn::{BurnImports, Scope, Type};
 use burn::backend::NdArray;
@@ -97,6 +97,7 @@ pub enum Node<PS: PrecisionSettings> {
     Matmul(MatmulNode),
     MaxPool1d(MaxPool1dNode),
     MaxPool2d(MaxPool2dNode),
+    Range(RangeNode),
     Reshape(ReshapeNode),
     Squeeze(SqueezeNode),
     Unary(UnaryNode),
@@ -130,6 +131,7 @@ macro_rules! match_all {
             Node::Matmul(node) => $func(node),
             Node::MaxPool1d(node) => $func(node),
             Node::MaxPool2d(node) => $func(node),
+            Node::Range(node) => $func(node),
             Node::Reshape(node) => $func(node),
             Node::Squeeze(node) => $func(node),
             Node::Unary(node) => $func(node),
@@ -173,6 +175,7 @@ impl<PS: PrecisionSettings> Node<PS> {
             Node::Matmul(_) => "matmul",
             Node::MaxPool1d(_) => "max_pool1d",
             Node::MaxPool2d(_) => "max_pool2d",
+            Node::Range(_) => "range",
             Node::Reshape(_) => "reshape",
             Node::Squeeze(_) => "squeeze",
             Node::Unary(unary) => unary.kind.as_str(),

crates/burn-import/src/burn/node/mod.rs

@@ -23,6 +23,7 @@ pub(crate) mod max_pool2d;
 pub(crate) mod prelu;
 pub(crate) mod random_normal;
 pub(crate) mod random_uniform;
+pub(crate) mod range;
 pub(crate) mod reshape;
 pub(crate) mod squeeze;
 pub(crate) mod unary;

crates/burn-import/src/burn/node/range.rs

@@ -0,0 +1,102 @@
+use super::{Node, NodeCodegen};
+use crate::burn::{ScalarType, Scope, TensorType, Type};
+use burn::record::PrecisionSettings;
+use proc_macro2::TokenStream;
+use quote::quote;
+
+#[derive(Debug, Clone, new)]
+pub struct RangeNode {
+    pub start: ScalarType,
+    pub end: ScalarType,
+    pub step: ScalarType,
+    pub output: TensorType,
+}
+
+impl<PS: PrecisionSettings> NodeCodegen<PS> for RangeNode {
+    fn output_types(&self) -> Vec<Type> {
+        vec![Type::Tensor(self.output.clone())]
+    }
+
+    fn input_types(&self) -> Vec<Type> {
+        vec![
+            Type::Scalar(self.start.clone()),
+            Type::Scalar(self.end.clone()),
+            Type::Scalar(self.step.clone()),
+        ]
+    }
+
+    fn forward(&self, _scope: &mut Scope, _node_position: usize) -> TokenStream {
+        let output = &self.output.name;
+
+        let start = &self.start.name;
+        let end = &self.end.name;
+        let step = &self.step.name;
+
+        quote! {
+            let #output = Tensor::arange_step(#start..#end, #step as usize, &*self.device);
+        }
+    }
+    fn into_node(self) -> Node<PS> {
+        Node::Range(self)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::burn::graph::BurnGraph;
+    use crate::burn::node::test::assert_tokens;
+    use crate::burn::{ScalarKind, ScalarType};
+    use burn::record::FullPrecisionSettings;
+
+    #[test]
+    fn codegen_nodes_range() {
+        let mut graph = BurnGraph::<FullPrecisionSettings>::default();
+
+        graph.register(
+            RangeNode::new(
+                ScalarType::new("start", ScalarKind::Int64),
+                ScalarType::new("end", ScalarKind::Int64),
+                ScalarType::new("step", ScalarKind::Int64),
+                TensorType::new_int("output", 1),
+            )
+            .into_node(),
+        );
+        graph.register_input_output(
+            vec!["start".to_string(), "end".to_string(), "step".to_string()],
+            vec!["output".to_string()],
+        );
+
+        let expected = quote! {
+            use burn::tensor::Int;
+            use burn::{
+                module::Module,
+                tensor::{backend::Backend, Tensor},
+            };
+
+            #[derive(Module, Debug)]
+            pub struct Model<B: Backend> {
+                phantom: core::marker::PhantomData<B>,
+                device: burn::module::Ignored<B::Device>,
+            }
+
+            impl<B: Backend> Model <B> {
+                #[allow(unused_variables)]
+                pub fn new(device: &B::Device) -> Self {
+                    Self {
+                        phantom: core::marker::PhantomData,
+                        device: burn::module::Ignored(device.clone()),
+                    }
+                }
+                #[allow(clippy::let_and_return, clippy::approx_constant)]
+                pub fn forward(&self, start: i64, end: i64, step: i64) -> Tensor<B, 1, Int> {
+                    let output = Tensor::arange_step(start..end, step as usize, &*self.device);
+
+                    output
+                }
+            }
+        };
+
+        assert_tokens(graph.codegen(), expected);
+    }
+}

crates/burn-import/src/onnx/dim_inference.rs

@@ -51,6 +51,7 @@ pub fn dim_inference(node: &mut Node, graph_io: &mut OnnxGraphIO) {
         NodeType::GreaterOrEqual => greater_or_equal_update_outputs(node),
         NodeType::Less => less_update_outputs(node),
         NodeType::LessOrEqual => less_or_equal_update_outputs(node),
+        NodeType::Range => range_update_outputs(node),
         NodeType::Reciprocal => same_as_input(node),
         NodeType::ReduceMax => reduce_max_update_outputs(node),
         NodeType::ReduceMean => reduce_mean_update_outputs(node),
@@ -587,6 +588,18 @@ fn matmul_update_outputs(node: &mut Node) {
     }
 }
 
+fn range_update_outputs(node: &mut Node) {
+    if node.inputs.len() != 3 {
+        panic!("Range: expected 3 inputs, found {}", node.inputs.len());
+    }
+
+    node.outputs[0].ty = ArgType::Tensor(TensorType {
+        elem_type: ElementType::Int64,
+        dim: 1,
+        shape: None,
+    });
+}
+
 /// Infers the shape of a ReduceMax node and replaces the shape of the output tensor.
 fn reduce_max_update_outputs(node: &mut Node) {
     if node.inputs.len() != 1 {

crates/burn-import/src/onnx/to_burn.rs

@@ -38,6 +38,7 @@ use crate::{
             prelu::PReluNode,
             random_normal::RandomNormalNode,
             random_uniform::RandomUniformNode,
+            range::RangeNode,
             reshape::ReshapeNode,
             squeeze::SqueezeNode,
             unary::UnaryNode,
@@ -279,6 +280,7 @@ impl OnnxGraph {
                 NodeType::Tanh => graph.register(Self::tanh_conversion(node)),
                 NodeType::Constant => graph.register(Self::constant_conversion::<PS>(node)),
                 NodeType::Min => graph.register(Self::min_conversion(node)),
+                NodeType::Range => graph.register(Self::range_conversion(node)),
                 NodeType::ReduceMax => graph.register(Self::reduce_max_conversion(node)),
                 NodeType::ReduceMean => graph.register(Self::reduce_mean_conversion(node)),
                 NodeType::ReduceSum => graph.register(Self::reduce_sum_conversion(node)),
@@ -575,6 +577,29 @@ impl OnnxGraph {
         BinaryNode::min_pair(lhs, rhs, output)
     }
 
+    fn range_conversion(node: Node) -> RangeNode {
+        fn convert_arg_to_scalar(arg: &Argument) -> ScalarType {
+            match &arg.ty {
+                ArgType::Scalar(scalar) => {
+                    ScalarType::new(arg.name.clone(), ScalarKind::from(scalar))
+                }
+                ArgType::Tensor(tensor) => {
+                    if tensor.dim != 0 {
+                        panic!("Range node requires scalar inputs");
+                    }
+                    ScalarType::new(arg.name.clone(), ScalarKind::from(&tensor.elem_type))
+                }
+                _ => panic!("Range node requires scalar inputs"),
+            }
+        }
+        let output = node.outputs.first().unwrap().to_tensor_type();
+        let start = convert_arg_to_scalar(node.inputs.first().unwrap());
+        let end = convert_arg_to_scalar(node.inputs.get(1).unwrap());
+        let step = convert_arg_to_scalar(node.inputs.get(2).unwrap());
+
+        RangeNode::new(start, end, step, output)
+    }
+
     fn reduce_max_conversion(node: Node) -> UnaryNode {
         let input = node.inputs.first().unwrap().to_type();
         let output = node.outputs.first().unwrap().to_type();