Fix 8w8a qat qconfig setting activations (#13284)

navsud · facebook-github-bot · commit 354c03ad9dca · 2025-08-12T18:23:00.000-07:00
Summary:

8-bit activation qconfig should not use reduce_range=True which limits the range to 0,127. This diff fixes that issue.

Reviewed By: cccclai

Differential Revision: D80007226
diff --git a/backends/qualcomm/quantizer/qconfig.py b/backends/qualcomm/quantizer/qconfig.py
@@ -396,7 +396,6 @@ def get_8a8w_qnn_qat_config(
         qscheme=(
             torch.per_tensor_symmetric if act_symmetric else torch.per_tensor_affine
         ),
-        reduce_range=True,
         observer=act_observer,
     )
     act_quantization_spec = QuantizationSpec(

Original file line number	Diff line number	Diff line change
`@@ -396,7 +396,6 @@ def get_8a8w_qnn_qat_config(`
`396`	`396`	`qscheme=(`
`397`	`397`	`torch.per_tensor_symmetric if act_symmetric else torch.per_tensor_affine`
`398`	`398`	`),`
`399`		`- reduce_range=True,`
`400`	`399`	`observer=act_observer,`
`401`	`400`	`)`
`402`	`401`	`act_quantization_spec = QuantizationSpec(`