annotate the rms_norm

Differential Revision: D77768317

Pull Request resolved: #12238

Author: billmguo

backends/qualcomm/quantizer/custom_annotation.py

@@ -20,6 +20,8 @@
 from torch.fx import Node
 from torchao.quantization.pt2e import FixedQParamsObserver, MinMaxObserver
 from torchao.quantization.pt2e.quantizer import (
+    annotate_input_qspec_map,
+    annotate_output_qspec,
     QuantizationAnnotation,
     QuantizationSpec,
     SharedQuantizationSpec,
@@ -213,6 +215,24 @@ def annotate_conv2d(node: Node, quantization_config: QuantizationConfig) -> None
             _annotated=True,
         )
 
+    def annotate_rms_norm(node: Node, quantization_config: QuantizationConfig) -> None:
+        act_node = node.args[0]
+        weight_node = node.args[2]
+
+        # TODO current only support 16a16w
+        annotate_input_qspec_map(
+            node,
+            act_node,
+            quantization_config.input_activation,
+        )
+
+        annotate_input_qspec_map(
+            node,
+            weight_node,
+            quantization_config.input_activation,
+        )
+        annotate_output_qspec(node, quantization_config.output_activation)
+
     def annotate_single_in_single_out(
         node: Node, quantization_config: QuantizationConfig
     ) -> None:
@@ -287,6 +307,9 @@ def annotate_matmul_input1(node: Node):
             elif node.target == torch.ops.aten.flatten.using_ints:
                 annotate_single_in_share_out(node, quantization_config_8a8w)
                 node = node.args[0]
+            elif node.target == torch.ops.aten.rms_norm.default:
+                annotate_rms_norm(node, quantization_config_8a8w)
+                node = node.args[0]
             elif node.target == torch.ops.aten.cat.default:
                 annotate_cat(node, quantization_config_8a8w)
                 # For v, we tag 8a until conv op.