Remove quantized_conv and leave just per tensor variants (#13958)

Summary:

As discussed offline, there is no need for the non-per-tensor-variants of quantized conv channels first/last. Only per-tensor variants remain.

Reviewed By: hsharma35

Differential Revision: D81649180

Author: Andrew Grebenisan

backends/cadence/aot/ref_implementations.py

@@ -296,7 +296,7 @@ def quantized_layer_norm_per_tensor(
     )
 
 
-def quantized_conv(
+def quantized_conv_per_tensor(
     input_tensor: torch.Tensor,
     weight: torch.Tensor,
     bias: torch.Tensor,
@@ -305,12 +305,12 @@ def quantized_conv(
     dilation: tuple[int, int],
     groups: int,
     in_zero_point: int,
-    weight_zero_point: torch.Tensor,
-    bias_scale: torch.Tensor,
+    weight_zero_point: int,
+    bias_scale: float,
     output_scale: float,
     output_zero_point: int,
-    out_multiplier: torch.Tensor,
-    out_shift: torch.Tensor,
+    out_multiplier: int,
+    out_shift: int,
 ) -> torch.Tensor:
     """
     Quantized convolution operation.
@@ -324,19 +324,13 @@ def quantized_conv(
         - dilation (Tuple[int]): The dilation of the convolution
         - groups (int): The number of groups
         - in_zero_point (int): The quantized mapping of zero for the input
-        - weight_zero_point (Tensor): The quantized mapping of zero for the weight
-        - bias_scale (Tensor): The quantized bias scale
+        - weight_zero_point (int): The quantized mapping of zero for the weight
+        - bias_scale (float): The quantized bias scale
         - output_scale (float): The scale of the output
         - output_zero_point (int): The zero point of the output
-        - out_multiplier (Tensor): Unused
-        - out_shift (Tensor): Unused
+        - out_multiplier (int): Unused
+        - out_shift (int): Unused
     """
-    if weight_zero_point.view(-1).shape != (1,):
-        raise ValueError("Weight zero point must be a scalar")
-
-    if bias_scale.view(-1).shape != (1,):
-        raise ValueError("Bias scale must be a scalar")
-
     if len(input_tensor.shape) == 3:
         float_out = torch.nn.functional.conv1d(
             (input_tensor - in_zero_point).float(),
@@ -371,8 +365,8 @@ def quantized_conv(
     )
 
 
-@impl(m, "quantized_conv_nchw")
-def quantized_conv_nchw(
+@impl(m, "quantized_conv_nchw_per_tensor")
+def quantized_conv_nchw_per_tensor(
     input_tensor: torch.Tensor,
     weight: torch.Tensor,
     bias: torch.Tensor,
@@ -381,12 +375,12 @@ def quantized_conv_nchw(
     dilation: tuple[int, int],
     groups: int,
     in_zero_point: int,
-    weight_zero_point: torch.Tensor,
-    bias_scale: torch.Tensor,
+    weight_zero_point: int,
+    bias_scale: float,
     output_scale: float,
     output_zero_point: int,
-    out_multiplier: torch.Tensor,
-    out_shift: torch.Tensor,
+    out_multiplier: int,
+    out_shift: int,
 ) -> torch.Tensor:
     """
     Quantized convolution operation.
@@ -400,16 +394,16 @@ def quantized_conv_nchw(
         - dilation (Tuple[int]): The dilation of the convolution
         - groups (int): The number of groups
         - in_zero_point (int): The quantized mapping of zero for the input
-        - weight_zero_point (Tensor): The quantized mapping of zero for the weight
-        - bias_scale (Tensor): The quantized bias scale
+        - weight_zero_point (int): The quantized mapping of zero for the weight
+        - bias_scale (float): The quantized bias scale
         - output_scale (float): The scale of the output
         - output_zero_point (int): The zero point of the output
-        - out_multiplier (Tensor): Unused
-        - out_shift (Tensor): Unused
+        - out_multiplier (int): Unused
+        - out_shift (int): Unused
     """
     if not input_tensor.is_contiguous(memory_format=torch.contiguous_format):
         raise ValueError("Input tensor must be in NCHW format")
-    return quantized_conv(
+    return quantized_conv_per_tensor(
         input_tensor,
         weight,
         bias,
@@ -427,8 +421,8 @@ def quantized_conv_nchw(
     )
 
 
-@impl(m, "quantized_conv_nhwc")
-def quantized_conv_nhwc(
+@impl(m, "quantized_conv_nhwc_per_tensor")
+def quantized_conv_nhwc_per_tensor(
     input_tensor: torch.Tensor,
     weight: torch.Tensor,
     bias: torch.Tensor,
@@ -437,12 +431,12 @@ def quantized_conv_nhwc(
     dilation: tuple[int, int],
     groups: int,
     in_zero_point: int,
-    weight_zero_point: torch.Tensor,
-    bias_scale: torch.Tensor,
+    weight_zero_point: int,
+    bias_scale: float,
     output_scale: float,
     output_zero_point: int,
-    out_multiplier: torch.Tensor,
-    out_shift: torch.Tensor,
+    out_multiplier: int,
+    out_shift: int,
 ) -> torch.Tensor:
     """
     Quantized convolution operation.
@@ -456,18 +450,18 @@ def quantized_conv_nhwc(
         - dilation (Tuple[int]): The dilation of the convolution
         - groups (int): The number of groups
         - in_zero_point (int): The quantized mapping of zero for the input
-        - weight_zero_point (Tensor): The quantized mapping of zero for the weight
-        - bias_scale (Tensor): The quantized bias scale
+        - weight_zero_point (int): The quantized mapping of zero for the weight
+        - bias_scale (float): The quantized bias scale
         - output_scale (float): The scale of the output
         - output_zero_point (int): The zero point of the output
-        - out_multiplier (Tensor): Unused
-        - out_shift (Tensor): Unused
+        - out_multiplier (int): Unused
+        - out_shift (int): Unused
     """
 
     if not input_tensor.is_contiguous(memory_format=torch.channels_last):
         raise ValueError("Input tensor must be in NHWC format")
 
-    return quantized_conv(
+    return quantized_conv_per_tensor(
         input_tensor,
         weight,
         bias,

backends/cadence/aot/tests/test_ref_implementations.py

@@ -15,8 +15,8 @@
     dequantize_per_tensor,
     quantize_per_tensor,
     quantized_add,
-    quantized_conv_nchw,
-    quantized_conv_nhwc,
+    quantized_conv_nchw_per_tensor,
+    quantized_conv_nhwc_per_tensor,
     quantized_layer_norm_per_tensor,
     quantized_linear,
     quantized_relu,
@@ -356,8 +356,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     1,  # groups
                     0,  # in_zero_point
-                    torch.tensor([0], dtype=torch.int8),  # weight_zero_point
-                    torch.tensor([1.0], dtype=torch.float32),  # bias_scale
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.1,  # output_scale
                     0,  # output_zero_point
                     torch.tensor(
@@ -387,8 +387,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     1,  # groups
                     0,  # in_zero_point
-                    torch.tensor([0], dtype=torch.int8),  # weight_zero_point
-                    torch.tensor([1.0], dtype=torch.float32),  # bias_scale
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.25,  # output_scale
                     0,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -416,8 +416,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     1,  # groups
                     128,  # in_zero_point
-                    torch.tensor([128], dtype=torch.uint8),  # weight_zero_point
-                    torch.tensor([0.1], dtype=torch.float32),  # bias_scale
+                    128,  # weight_zero_point
+                    0.1,  # bias_scale
                     0.1,  # output_scale
                     128,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -447,8 +447,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation (padding for 2D, actual dilation is dilation[1])
                     1,  # groups
                     0,  # in_zero_point
-                    torch.tensor([0], dtype=torch.int8),  # weight_zero_point
-                    torch.tensor([1.0], dtype=torch.float32),  # bias_scale
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.5,  # output_scale
                     0,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -482,8 +482,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     1,  # groups
                     0,  # in_zero_point
-                    torch.tensor([0], dtype=torch.int8),  # weight_zero_point
-                    torch.tensor([1.0], dtype=torch.float32),  # bias_scale
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.2,  # output_scale
                     0,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -523,8 +523,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     1,  # groups
                     0,  # in_zero_point
-                    torch.tensor([0], dtype=torch.int16),  # weight_zero_point
-                    torch.tensor([1.0], dtype=torch.float32),  # bias_scale
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.1,  # output_scale
                     0,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -576,12 +576,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     1,  # groups
                     0,  # in_zero_point
-                    torch.tensor(
-                        [0], dtype=torch.int16
-                    ),  # weight_zero_point for each output channel
-                    torch.tensor(
-                        [1.0], dtype=torch.float32
-                    ),  # bias_scale for each channel
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.05,  # output_scale
                     0,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -623,12 +619,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     2,  # groups (grouped convolution)
                     0,  # in_zero_point
-                    torch.tensor(
-                        [0], dtype=torch.int8
-                    ),  # weight_zero_point for each output channel
-                    torch.tensor(
-                        [1.0], dtype=torch.float32
-                    ),  # bias_scale for each channel
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.2,  # output_scale
                     0,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -666,8 +658,8 @@ def test_quantized_layer_norm_per_tensor(
                     (1, 1),  # dilation
                     1,  # groups
                     0,  # in_zero_point
-                    torch.tensor([0], dtype=torch.int8),  # weight_zero_point
-                    torch.tensor([1.0], dtype=torch.float32),  # bias_scale
+                    0,  # weight_zero_point
+                    1.0,  # bias_scale
                     0.5,  # output_scale
                     0,  # output_zero_point
                     typing.cast(None, torch.Tensor),
@@ -682,7 +674,7 @@ def test_quantized_layer_norm_per_tensor(
             ],
         ]
     )
-    def test_quantized_conv(
+    def test_quantized_conv_per_tensor(
         self,
         input_tensor: torch.Tensor,
         weight: torch.Tensor,
@@ -692,12 +684,12 @@ def test_quantized_conv(
         dilation: tuple[int, int],
         groups: int,
         in_zero_point: int,
-        weight_zero_point: torch.Tensor,
-        bias_scale: torch.Tensor,
+        weight_zero_point: int,
+        bias_scale: float,
         output_scale: float,
         output_zero_point: int,
-        out_multiplier: torch.Tensor,
-        out_shift: torch.Tensor,
+        out_multiplier: int,
+        out_shift: int,
         dtype: torch.dtype,
         expected_output: torch.Tensor,
         memory_format: torch.memory_format,
@@ -710,9 +702,9 @@ def test_quantized_conv(
         input_tensor = input_tensor.to(memory_format=memory_format)
 
         conv = (
-            quantized_conv_nchw
+            quantized_conv_nchw_per_tensor
             if memory_format == torch.contiguous_format
-            else quantized_conv_nhwc
+            else quantized_conv_nhwc_per_tensor
         )
 
         output = conv(