2/n Enable 16-bit activations and 8-bit weights in Cadence Quantizer for linear

Summary:
# Context
We continue from D84284794 to add support for 16-bit activations. Note that right now, all though they support 16-bit activations already, it's only if the weights are also 16-bits. To do this, we need to change the way we template some functions. 


# Current Behavior
Right now, we're composing two macros together, the `ET_FORALL_JARVIS_QUANTIZED_TYPES_WITH_INT16` macro: 

https://www.internalfb.com/code/fbsource/[9e8c6d8466107f58aa3de1b9e4ec71c49d670a8f]/fbcode/on_device_ai/Assistant/Jarvis/min_runtime/operators/generic/operators.h?lines=22-25


and the function macro(`quantized_linear` chosen for example): 

https://www.internalfb.com/code/fbsource/[9e8c6d8466107f58aa3de1b9e4ec71c49d670a8f]/fbcode/on_device_ai/Assistant/Jarvis/min_runtime/operators/generic/quantized_linear_out.cpp?lines=30-41



so together, it just becomes a switch statement, calling the `quantized_linear` function with the correct template parameter. 

However, note that it assumes that both the input activations and weights are the same dtype, which is not the case. 

# This Diff
We fix the generic implementation by allowing there to be two generics, one for the weight and one for the input activations.

Reviewed By: hsharma35

Differential Revision: D86538176

Author: RahulC7

backends/cadence/hifi/operators/op_quantized_linear_out.cpp

@@ -14,6 +14,7 @@
 #include <algorithm>
 #include <cmath>
 #include <optional>
+#include <on_device_ai/Assistant/Jarvis/min_runtime/operators/generic/operators.h>
 
 namespace impl {
 namespace HiFi {
@@ -207,7 +208,7 @@ void inline _quantized_linear_per_tensor_asym8s(
 }
 
 void quantized_linear_out(
-    __ET_UNUSED KernelRuntimeContext& ctx,
+    KernelRuntimeContext& ctx,
     const Tensor& in,
     const Tensor& weight,
     const Tensor& bias,
@@ -216,9 +217,26 @@ void quantized_linear_out(
     const Tensor& out_multiplier,
     const Tensor& out_shift,
     int64_t out_zero_point,
-    __ET_UNUSED const optional<Tensor>& offset,
+    const optional<Tensor>& offset,
     Tensor& out) {
-  if (out.scalar_type() == executorch::aten::ScalarType::Byte) {
+  if (out.scalar_type() == ::executorch::aten::ScalarType::Short && in.scalar_type() == ::executorch::aten::ScalarType::Short &&
+      weight.scalar_type() == ::executorch::aten::ScalarType::Char) {
+    ::impl::generic::native::quantized_linear_out(
+      ctx,
+      in,
+      weight,
+      bias,
+      in_zero_point,
+      weight_zero_point,
+      out_multiplier,
+      out_shift,
+      out_zero_point,
+      offset,
+      out
+    );
+  }
+
+  else if (out.scalar_type() == executorch::aten::ScalarType::Byte) {
     _quantized_linear_asym8u(
         in,
         weight,
@@ -260,7 +278,24 @@ void quantized_linear_per_tensor_out(
     int64_t out_zero_point,
     __ET_UNUSED const optional<Tensor>& offset,
     Tensor& out) {
-  if (out.scalar_type() == executorch::aten::ScalarType::Byte) {
+  if (out.scalar_type() == ::executorch::aten::ScalarType::Short && in.scalar_type() == ::executorch::aten::ScalarType::Short &&
+      weight.scalar_type() == ::executorch::aten::ScalarType::Char) {
+    ::impl::generic::native::quantized_linear_per_tensor_out(
+      ctx,
+      in,
+      weight,
+      bias,
+      in_zero_point,
+      weight_zero_point,
+      out_multiplier,
+      out_shift,
+      out_zero_point,
+      offset,
+      out
+    );
+  }
+
+  else if (out.scalar_type() == executorch::aten::ScalarType::Byte) {
     _quantized_linear_per_tensor_asym8u(
         in,
         weight,

backends/cadence/hifi/operators/targets.bzl

@@ -87,7 +87,6 @@ OPERATORS = [
     "quantized_fully_connected_asym8sxasym8s_asym8s_per_tensor_out",
     "quantized_fully_connected_asym8uxasym8u_asym8u_per_tensor_out",
     "quantized_layer_norm",
-    "quantized_linear_out",
     "quantized_linear_asym8sxasym8s_asym8s_per_tensor_out",
     "quantized_linear_asym8uxasym8u_asym8u_per_tensor_out",
     "quantized_matmul_out",
@@ -122,3 +121,7 @@ def define_common_targets():
     # Define build targets for all operators registered in the tables above.
     for op in OPERATORS:
         define_operator(op)
+
+    # quantized_linear_out and quantized_linear_per_tensor_out needs additional dependency for int16 support
+    define_operator("quantized_linear_out", deps=["fbcode//on_device_ai/Assistant/Jarvis/min_runtime/operators:quantize_linear_out", "fbcode//on_device_ai/Assistant/Jarvis/min_runtime/operators:headers",])
+    define_operator("quantized_linear_per_tensor_out", deps=["fbcode//on_device_ai/Assistant/Jarvis/min_runtime/operators:quantize_linear_out", "fbcode//on_device_ai/Assistant/Jarvis/min_runtime/operators:headers",])

backends/cadence/hifi/operators/tests/test_op_quantized_linear_out.cpp

@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ * 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.
+ */
+
+#include <gtest/gtest.h>
+#include <sys/times.h>
+
+#include <executorch/kernels/test/TestUtil.h>
+#include <executorch/runtime/core/error.h>
+#include <executorch/runtime/core/exec_aten/exec_aten.h>
+#include <executorch/runtime/core/exec_aten/testing_util/tensor_factory.h>
+#include <executorch/runtime/core/exec_aten/testing_util/tensor_util.h>
+#include <executorch/runtime/platform/runtime.h>
+
+#include <executorch/backends/cadence/hifi/operators/operators.h>
+
+namespace impl {
+namespace HiFi {
+namespace native {
+namespace {
+
+using ::executorch::aten::Scalar;
+using ::executorch::aten::ScalarType;
+using ::executorch::aten::Tensor;
+using ::executorch::aten::TensorImpl;
+using ::executorch::runtime::Error;
+using ::executorch::runtime::KernelRuntimeContext;
+using ::executorch::runtime::runtime_init;
+using ::executorch::runtime::testing::TensorFactory;
+using std::optional;
+using std::string_view;
+
+class HiFiQuantizedLinearTest : public OperatorTest {
+ public:
+ protected:
+  void quantized_linear_out(
+      const Tensor& input,
+      const Tensor& weight,
+      const Tensor& bias,
+      int64_t in_zero_point,
+      const Tensor& weight_zero_point,
+      const Tensor& out_multiplier,
+      const Tensor& out_shift,
+      int64_t out_zero_point,
+      const optional<Tensor>& offset,
+      Tensor& output) {
+    return ::impl::HiFi::native::quantized_linear_out(
+        context_,
+        input,
+        weight,
+        bias,
+        in_zero_point,
+        weight_zero_point,
+        out_multiplier,
+        out_shift,
+        out_zero_point,
+        offset,
+        output);
+  }
+
+  void quantized_linear_per_tensor_out(
+      const Tensor& input,
+      const Tensor& weight,
+      const Tensor& bias,
+      int64_t in_zero_point,
+      int64_t weight_zero_point,
+      int64_t out_multiplier,
+      int64_t out_shift,
+      int64_t out_zero_point,
+      const optional<Tensor>& offset,
+      Tensor& output) {
+    return ::impl::HiFi::native::quantized_linear_per_tensor_out(
+        context_,
+        input,
+        weight,
+        bias,
+        in_zero_point,
+        weight_zero_point,
+        out_multiplier,
+        out_shift,
+        out_zero_point,
+        offset,
+        output);
+  }
+};
+
+// Test quantized_linear_out with int16 activations (asym8s)
+TEST_F(HiFiQuantizedLinearTest, QuantizedLinearInt16Test) {
+  TensorFactory<ScalarType::Short> tf_int16;
+  TensorFactory<ScalarType::Int> tf_int32;
+  TensorFactory<ScalarType::Char> tf_int8;
+
+  // Simple 2D case: input [2, 3] x weight [4, 3] = output [2, 4]
+  // Values captured from e2e test with CadenceWith16BitLinearActivationsQuantizer
+  Tensor input = tf_int16.make({2, 3}, {-28170, -26389, -32768, -31474, -32266, -29076});
+  Tensor weight = tf_int8.make(
+      {4, 3}, {1, 87, -128, -114, -59, 44, -1, 127, -12, 44, -46, -29});
+  Tensor bias = tf_int32.zeros({4});
+  Tensor output = tf_int16.zeros({2, 4});
+
+  int64_t in_zero_point = -29822;
+  Tensor weight_zero_point = tf_int32.make({1}, {2});
+  Tensor out_multiplier = tf_int32.make({1}, {2011373824});
+  Tensor out_shift = tf_int32.make({1}, {-8});
+  int64_t out_zero_point = -30847;
+  quantized_linear_out(
+      input,
+      weight,
+      bias,
+      in_zero_point,
+      weight_zero_point,
+      out_multiplier,
+      out_shift,
+      out_zero_point,
+      std::nullopt,
+      output);
+  // Expected output from e2e test
+  Tensor expected_output = tf_int16.make({2, 4}, {-28384, -32767, -29144, -30862, -31956, -29486, -31985, -30756});
+  EXPECT_TENSOR_CLOSE(output, expected_output);
+}
+
+} // namespace
+} // namespace native
+} // namespace HiFi
+} // namespace impl