Add op_amax support

backends/qualcomm/_passes/layout_transform.py

@@ -47,6 +47,7 @@ class LayoutTransform(ExportPass):
     layout_agnostic_ops = {
         exir_ops.edge.aten.abs.default,
         exir_ops.edge.aten.add.Tensor,
+        exir_ops.edge.aten.amax.default,
         exir_ops.edge.aten.bitwise_or.Tensor,
         exir_ops.edge.aten.bmm.default,
         exir_ops.edge.aten.bitwise_and.Tensor,

backends/qualcomm/builders/__init__.py

@@ -9,6 +9,7 @@
     op_abs,
     op_adaptive_avg_pool2d,
     op_add,
+    op_amax,
     op_and,
     op_arange,
     op_argmin,
@@ -95,6 +96,7 @@
     op_abs,
     op_adaptive_avg_pool2d,
     op_add,
+    op_amax,
     op_and,
     op_arange,
     op_argmin,

backends/qualcomm/builders/op_amax.py

@@ -0,0 +1,84 @@
+# Copyright (c) Qualcomm Innovation Center, Inc.
+# All rights reserved
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+from typing import cast, Dict, List
+
+import executorch.backends.qualcomm.python.PyQnnWrapperAdaptor as PyQnnWrapper
+
+import numpy as np
+
+import torch
+from executorch.backends.qualcomm.utils.constants import QCOM_AXIS_ORDER, QCOM_DATA
+
+from .node_visitor import NodeVisitor, register_node_visitor
+from .qnn_constants import OpAmax, QNN_OP_PACKAGE_NAME_QTI_AISW
+
+
+@register_node_visitor
+class AMax(NodeVisitor):
+    target = ["aten.amax.default"]
+
+    def __init__(self, *args) -> None:
+        super().__init__(*args)
+
+    def define_node(
+        self,
+        node: torch.fx.Node,
+        nodes_to_wrappers: Dict[torch.fx.Node, PyQnnWrapper.TensorWrapper],
+    ) -> PyQnnWrapper.PyQnnOpWrapper:
+        input_node = node.args[0]
+        input_tensor = self.get_tensor(input_node, node)
+        input_tensor_wrapper = self.define_tensor(
+            input_node,
+            node,
+            input_tensor,
+            PyQnnWrapper.Qnn_TensorType_t.QNN_TENSOR_TYPE_NATIVE,
+            nodes_to_wrappers,
+        )
+
+        # mean dims and keep dims
+        mean_dims = cast(List[int], node.args[1])
+        mean_dims = [
+            mean_dim % len(input_node.meta["val"].shape) for mean_dim in mean_dims
+        ]
+        if QCOM_AXIS_ORDER in node.meta:
+            mean_dims = [
+                node.meta[QCOM_AXIS_ORDER].index(mean_dim) for mean_dim in mean_dims
+            ]
+        mean_dims_shape = [len(mean_dims)]
+
+        output_tensor = self.get_tensor(node, node)
+        output_tensor_wrapper = self.define_tensor(
+            node,
+            node,
+            output_tensor,
+            PyQnnWrapper.Qnn_TensorType_t.QNN_TENSOR_TYPE_NATIVE,
+            nodes_to_wrappers,
+        )
+
+        reduce_max_op = PyQnnWrapper.PyQnnOpWrapper(
+            node.name,
+            QNN_OP_PACKAGE_NAME_QTI_AISW,
+            OpAmax.op_name,
+        )
+        reduce_max_op.AddInputTensors([input_tensor_wrapper])
+        reduce_max_op.AddOutputTensors([output_tensor_wrapper])
+        reduce_max_op.AddTensorParam(
+            OpAmax.param_axes,
+            PyQnnWrapper.Qnn_DataType_t.QNN_DATATYPE_UINT_32,
+            len(mean_dims_shape),
+            mean_dims_shape,
+            np.array(mean_dims, dtype=np.uint32),
+            True,
+        )
+        if len(node.args) > 2:
+            keep_dims = cast(bool, node.args[2])
+            reduce_max_op.AddScalarParam(
+                OpAmax.param_keep_dims,
+                PyQnnWrapper.Qnn_DataType_t.QNN_DATATYPE_BOOL_8,
+                {QCOM_DATA: keep_dims},
+            )
+
+        return reduce_max_op

backends/qualcomm/builders/qnn_constants.py

@@ -14,6 +14,13 @@
 # instead of replicating them here.
 
 
+@dataclass(init=False, frozen=True)
+class OpAmax:
+    op_name: str = "ReduceMax"
+    param_axes: str = "axes"
+    param_keep_dims: str = "keep_dims"
+
+
 @dataclass(init=False, frozen=True)
 class OpBatchnorm:
     op_name: str = "Batchnorm"

backends/qualcomm/quantizer/annotators.py

@@ -182,6 +182,11 @@ def annotate_add(node: Node, quantization_config: QuantizationConfig) -> None:
     annotate_binary(node, quantization_config)
 
 
+@register_annotator([torch.ops.aten.amax.default])
+def annotate_amax(node: Node, quantization_config: QuantizationConfig) -> None:
+    annotate_binary(node, quantization_config)
+
+
 @register_annotator([torch.ops.aten.argmin.default])
 def annotate_argmin(node: Node, quantization_config: QuantizationConfig) -> None:
     if _is_annotated([node]):

backends/qualcomm/tests/models.py

@@ -72,6 +72,16 @@ def forward(self, x):
         return torch.any(x, dim=self.dim, keepdim=self.keepdim)
 
 
+class AMax(torch.nn.Module):
+    def __init__(self, dim=None, keepdim=False):
+        super().__init__()
+        self.dim = dim
+        self.keepdim = keepdim
+
+    def forward(self, x):
+        return torch.amax(x, dim=self.dim, keepdim=self.keepdim)
+
+
 class Arange(torch.nn.Module):
     def __init__(self, start, end, step, dtype):
         super().__init__()

backends/qualcomm/tests/test_qnn_delegate.py

@@ -113,6 +113,13 @@ def test_qnn_backend_adaptive_avg_pool2d(self):
         sample_input = (torch.randn(1, 512, 7, 7),)
         self.lower_module_and_test_output(module, sample_input)
 
+    def test_qnn_backend_amax(self):
+        modules = [AMax(dim=1, keepdim=False), AMax(dim=1, keepdim=True)]  # noqa: F405
+        sample_input = (torch.randn(4, 4),)
+        for i, module in enumerate(modules):
+            with self.subTest(i=i):
+                self.lower_module_and_test_output(module, sample_input)
+
     def test_qnn_backend_any(self):
         modules = [Any(), Any(dim=[0, 1]), Any(dim=1, keepdim=True)]  # noqa: F405
         sample_input = (torch.randn(3, 3, 3) > 0,)
@@ -1111,6 +1118,14 @@ def test_qnn_backend_adaptive_avg_pool2d(self):
         module = self.get_qdq_module(module, sample_input)
         self.lower_module_and_test_output(module, sample_input)
 
+    def test_qnn_backend_amax(self):
+        modules = [AMax(dim=1, keepdim=False), AMax(dim=1, keepdim=True)]  # noqa: F405
+        sample_input = (torch.randn(4, 4),)
+        for i, module in enumerate(modules):
+            with self.subTest(i=i):
+                module = self.get_qdq_module(module, sample_input)
+                self.lower_module_and_test_output(module, sample_input)
+
     def test_qnn_backend_any(self):
         modules = [Any(), Any(dim=[0, 1]), Any(dim=1, keepdim=True)]  # noqa: F405
         sample_input = (torch.randn(3, 3, 3) > 0,)