Move dyn_int8_act_int4_wei_cpu_layout to prototype/dtypes

test/quantization/test_da8w4_cpu.py

@@ -176,5 +176,32 @@ def forward(self, x):
 common_utils.instantiate_parametrized_tests(TestDa8w4Cpu)
 
 
+# TODO: Remove this test once the deprecated API has been removed
+def test_int8_dynamic_act_int4_weight_cpu_layout_deprecated():
+    import sys
+    import warnings
+
+    # We need to clear the cache to force re-importing and trigger the warning again.
+    modules_to_clear = [
+        "torchao.dtypes.uintx.dyn_int8_act_int4_wei_cpu_layout",
+        "torchao.dtypes",
+    ]
+    for mod in modules_to_clear:
+        if mod in sys.modules:
+            del sys.modules[mod]
+
+    with warnings.catch_warnings(record=True) as w:
+        from torchao.dtypes import Int8DynamicActInt4WeightCPULayout  # noqa: F401
+
+        warnings.simplefilter("always")  # Ensure all warnings are captured
+        assert any(
+            issubclass(warning.category, DeprecationWarning)
+            and "Int8DynamicActInt4WeightCPULayout" in str(warning.message)
+            for warning in w
+        ), (
+            f"Expected deprecation warning for Int8DynamicActInt4WeightCPULayout, got: {[str(warning.message) for warning in w]}"
+        )
+
+
 if __name__ == "__main__":
     run_tests()

torchao/dtypes/__init__.py

@@ -16,7 +16,6 @@
 from .uintx import (
     Int4CPULayout,
     Int4XPULayout,
-    Int8DynamicActInt4WeightCPULayout,
     MarlinQQQLayout,
     MarlinQQQTensor,
     MarlinSparseLayout,
@@ -29,6 +28,7 @@
 )
 from .uintx.block_sparse_layout import BlockSparseLayout
 from .uintx.cutlass_int4_packed_layout import CutlassInt4PackedLayout
+from .uintx.dyn_int8_act_int4_wei_cpu_layout import Int8DynamicActInt4WeightCPULayout
 from .utils import (
     Layout,
     PlainLayout,

torchao/dtypes/affine_quantized_tensor_ops.py

@@ -25,10 +25,6 @@
     _linear_f16_bf16_act_floatx_weight_check,
     _linear_f16_bf16_act_floatx_weight_impl,
 )
-from torchao.dtypes.uintx.dyn_int8_act_int4_wei_cpu_layout import (
-    _linear_int8_act_int4_weight_cpu_check,
-    _linear_int8_act_int4_weight_cpu_impl,
-)
 from torchao.dtypes.uintx.gemlite_layout import (
     _linear_fp_act_int4_weight_gemlite_check,
     _linear_fp_act_int4_weight_gemlite_impl,
@@ -94,6 +90,10 @@
     _linear_int8_act_int4_weight_cutlass_check,
     _linear_int8_act_int4_weight_cutlass_impl,
 )
+from torchao.prototype.dtypes.uintx.dyn_int8_act_int4_wei_cpu_layout import (
+    _linear_int8_act_int4_weight_cpu_check,
+    _linear_int8_act_int4_weight_cpu_impl,
+)
 from torchao.quantization.quant_primitives import (
     ZeroPointDomain,
     _dequantize_affine_no_zero_point,