feat: Less + LessOrEqual onnx import

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

@@ -89,8 +89,8 @@ represent the corresponding Burn Op.
 | [IsNaN][81]                      |       ❌       |      ❌      |
 | [LayerNormalization][82]         |       ✅       |      ✅      |
 | [LeakyRelu][83]                  |       ✅       |      ✅      |
-| [Less][84]                       |       ❌       |      ✅      |
-| [LessOrEqual][85]                |       ❌       |      ✅      |
+| [Less][84]                       |       ✅       |      ✅      |
+| [LessOrEqual][85]                |       ✅       |      ✅      |
 | Linear                           |       ✅       |      ✅      |
 | [Log][87]                        |       ✅       |      ✅      |
 | [LogSoftmax][88]                 |       ✅       |      ✅      |

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

@@ -40,6 +40,8 @@ fn main() {
         .input("tests/mul/mul.onnx")
         .input("tests/neg/neg.onnx")
         .input("tests/not/not.onnx")
+        .input("tests/less/less.onnx")
+        .input("tests/less_or_equal/less_or_equal.onnx")
         .input("tests/recip/recip.onnx")
         .input("tests/relu/relu.onnx")
         .input("tests/leaky_relu/leaky_relu.onnx")

crates/burn-import/onnx-tests/tests/less/less.onnx

@@ -0,0 +1,17 @@
+pytorch2.3.0:

+,
+onnx::Less_0
+onnx::Less_1
2/Less"Less
+main_graphZ
+onnx::Less_0
+

+
+Z
+onnx::Less_1
+

+
+b
+
2
+	
+
+B

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

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+
+# used to generate model: onnx-tests/tests/less/less.onnx
+
+import torch
+import torch.nn as nn
+
+class Model(nn.Module):
+    def __init__(self):
+        super(Model, self).__init__()
+
+    def forward(self, x, y):
+        return torch.lt(x,y)
+
+def main():
+    # Set seed for reproducibility
+    torch.manual_seed(42)
+    torch.set_printoptions(precision=8)
+
+    # Export to onnx
+    model = Model()
+    model.eval()
+    device = torch.device("cpu")
+
+    onnx_name = "less.onnx"
+
+    test_input1 = torch.randn(4, 4, device=device)
+    test_input2 = torch.randn(4, 4, device=device)
+    torch.onnx.export(model, (test_input1, test_input2), onnx_name, verbose=False, opset_version=16)
+
+    print("Finished exporting model to {}".format(onnx_name))
+
+    print("Test input data: {} {}".format(test_input1, test_input2))
+    output = model.forward(test_input1, test_input2)
+    print("Test output data: {}".format(output))
+
+if __name__ == '__main__':
+    main()

crates/burn-import/onnx-tests/tests/less_or_equal/less_or_equal.onnx

@@ -0,0 +1,17 @@
+pytorch2.3.0:¹

+H
+onnx::LessOrEqual_0
+onnx::LessOrEqual_1
2/LessOrEqual"LessOrEqual
+main_graphZ%
+onnx::LessOrEqual_0
+

+
+Z%
+onnx::LessOrEqual_1
+

+
+b
+
2
+	
+
+B

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

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+
+# used to generate model: onnx-tests/tests/less_or_equal/less_or_equal.onnx
+
+import torch
+import torch.nn as nn
+
+class Model(nn.Module):
+    def __init__(self):
+        super(Model, self).__init__()
+
+    def forward(self, x, y):
+        return torch.le(x,y)
+
+def main():
+    # Set seed for reproducibility
+    torch.manual_seed(42)
+    torch.set_printoptions(precision=8)
+
+    # Export to onnx
+    model = Model()
+    model.eval()
+    device = torch.device("cpu")
+
+    onnx_name = "less_or_equal.onnx"
+
+    test_input1 = torch.randn(4, 4, device=device)
+    test_input2 = torch.randn(4, 4, device=device)
+    torch.onnx.export(model, (test_input1, test_input2), onnx_name, verbose=False, opset_version=16)
+
+    print("Finished exporting model to {}".format(onnx_name))
+
+    print("Test input data: {} {}".format(test_input1, test_input2))
+    output = model.forward(test_input1, test_input2)
+    print("Test output data: {}".format(output))
+
+if __name__ == '__main__':
+    main()

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

@@ -51,6 +51,8 @@ include_models!(
     mul,
     neg,
     not,
+    less,
+    less_or_equal,
     prelu,
     recip,
     reduce_max,
@@ -1171,6 +1173,32 @@ mod tests {
         assert_eq!(output, expected);
     }
 
+    #[test]
+    fn less() {
+        let device = Default::default();
+        let model: less::Model<Backend> = less::Model::new(&device);
+
+        let input1 = Tensor::<Backend, 2>::from_floats([[1.0, 4.0, 9.0, 25.0]], &device);
+        let input2 = Tensor::<Backend, 2>::from_floats([[1.0, 5.0, 8.0, -25.0]], &device);
+
+        let output = model.forward(input1, input2);
+        let expected = Data::from([[false, true, false, false]]);
+        assert_eq!(output.to_data(), expected);
+    }
+
+    #[test]
+    fn less_or_equal() {
+        let device = Default::default();
+        let model: less_or_equal::Model<Backend> = less_or_equal::Model::new(&device);
+
+        let input1 = Tensor::<Backend, 2>::from_floats([[1.0, 4.0, 9.0, 25.0]], &device);
+        let input2 = Tensor::<Backend, 2>::from_floats([[1.0, 5.0, 8.0, -25.0]], &device);
+
+        let output = model.forward(input1, input2);
+        let expected = Data::from([[true, true, false, false]]);
+        assert_eq!(output.to_data(), expected);
+    }
+
     #[test]
     fn test_model_creation_with_a_default_device() {
         let device = Default::default();

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

@@ -16,6 +16,8 @@ pub enum BinaryType {
     Powi,
     Min,
     Max,
+    Less,
+    LessOrEqual,
 }
 
 impl BinaryType {
@@ -30,6 +32,8 @@ impl BinaryType {
             BinaryType::Powf => "powf",
             BinaryType::Min => "min_pair",
             BinaryType::Max => "max_pair",
+            BinaryType::Less => "lower",
+            BinaryType::LessOrEqual => "lower_equal",
         }
     }
 }
@@ -193,6 +197,28 @@ impl BinaryNode {
         };
         Self::new(lhs, rhs, output, BinaryType::Max, Arc::new(function))
     }
+
+    pub(crate) fn lower(lhs: Type, rhs: Type, output: Type) -> Self {
+        let function = match (&lhs, &rhs) {
+            (Type::Tensor(_), Type::Tensor(_)) => move |lhs, rhs| quote! { #lhs.lower(#rhs) },
+            _ => panic!("lower is supported for tensor only"),
+        };
+        Self::new(lhs, rhs, output, BinaryType::Less, Arc::new(function))
+    }
+
+    pub(crate) fn lower_equal(lhs: Type, rhs: Type, output: Type) -> Self {
+        let function = match (&lhs, &rhs) {
+            (Type::Tensor(_), Type::Tensor(_)) => move |lhs, rhs| quote! { #lhs.lower_equal(#rhs) },
+            _ => panic!("lower_equal is supported for tensor only"),
+        };
+        Self::new(
+            lhs,
+            rhs,
+            output,
+            BinaryType::LessOrEqual,
+            Arc::new(function),
+        )
+    }
 }
 
 #[cfg(test)]
@@ -358,6 +384,16 @@ mod tests {
         test_binary_operator_on_tensors!(max_pair);
     }
 
+    #[test]
+    fn test_binary_codegen_less() {
+        test_binary_operator_on_tensors!(lower);
+    }
+
+    #[test]
+    fn test_binary_codegen_less_or_equal() {
+        test_binary_operator_on_tensors!(lower_equal);
+    }
+
     #[test]
     fn test_binary_codegen_equal_tensors() {
         let mut graph = BurnGraph::<FullPrecisionSettings>::default();

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

@@ -46,6 +46,8 @@ pub fn dim_inference(node: &mut Node, graph_io: &mut OnnxGraphIO) {
         NodeType::Mul => same_as_input(node),
         NodeType::Neg => same_as_input(node),
         NodeType::Not => same_as_input(node),
+        NodeType::Less => less_update_outputs(node),
+        NodeType::LessOrEqual => less_or_equal_update_outputs(node),
         NodeType::Reciprocal => same_as_input(node),
         NodeType::ReduceMax => reduce_max_update_outputs(node),
         NodeType::ReduceMean => reduce_mean_update_outputs(node),
@@ -237,6 +239,30 @@ fn reshape_update_outputs(node: &mut Node) {
     }
 }
 
+fn less_update_outputs(node: &mut Node) {
+    match &node.inputs[0].ty {
+        ArgType::Tensor(tensor) => {
+            node.outputs[0].ty = ArgType::Tensor(TensorType {
+                elem_type: ElementType::Bool,
+                ..tensor.clone()
+            });
+        }
+        _ => panic!("Only tensor input is valid"),
+    }
+}
+
+fn less_or_equal_update_outputs(node: &mut Node) {
+    match &node.inputs[0].ty {
+        ArgType::Tensor(tensor) => {
+            node.outputs[0].ty = ArgType::Tensor(TensorType {
+                elem_type: ElementType::Bool,
+                ..tensor.clone()
+            });
+        }
+        _ => panic!("Only tensor input is valid"),
+    }
+}
+
 fn reduce_mean_update_outputs(node: &mut Node) {
     if node.inputs.len() != 1 {
         panic!("Mean: multiple inputs are not supported");

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

@@ -251,6 +251,8 @@ impl OnnxGraph {
                 NodeType::MatMul => graph.register(Self::matmul_conversion(node)),
                 NodeType::Neg => graph.register(Self::neg_conversion(node)),
                 NodeType::Not => graph.register(Self::not_conversion(node)),
+                NodeType::Less => graph.register(Self::less_conversion(node)),
+                NodeType::LessOrEqual => graph.register(Self::less_or_equal_conversion(node)),
                 NodeType::LayerNormalization => {
                     graph.register(Self::layer_norm_conversion::<PS>(node))
                 }
@@ -822,6 +824,22 @@ impl OnnxGraph {
         UnaryNode::not(input, output)
     }
 
+    fn less_conversion(node: Node) -> BinaryNode {
+        let lhs = node.inputs.first().unwrap().to_type();
+        let rhs = node.inputs.get(1).unwrap().to_type();
+        let output = node.outputs.first().unwrap().to_type();
+
+        BinaryNode::lower(lhs, rhs, output)
+    }
+
+    fn less_or_equal_conversion(node: Node) -> BinaryNode {
+        let lhs = node.inputs.first().unwrap().to_type();
+        let rhs = node.inputs.get(1).unwrap().to_type();
+        let output = node.outputs.first().unwrap().to_type();
+
+        BinaryNode::lower_equal(lhs, rhs, output)
+    }
+
     fn pow_conversion(node: Node) -> BinaryNode {
         let lhs = node.inputs.first().unwrap().to_type();
         let rhs = node.inputs.get(1).unwrap().to_type();