COMPMID-2305: NEDepthwiseConvolution 3x3: support for QUANT8_PER_CHANNEL_SYMM

Change-Id: I9a917cff6a089ce6ae16fb4e6066a4194e2e9487
Signed-off-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2241
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Marquez <pablo.tello@arm.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/arm_compute/core/NEON/kernels/convolution/common/qsymm8.hpp b/arm_compute/core/NEON/kernels/convolution/common/qsymm8.hpp
new file mode 100644
index 0000000000..41bfbe4d8a
--- /dev/null
+++ b/arm_compute/core/NEON/kernels/convolution/common/qsymm8.hpp
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2019 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+#include <cstdint>
+#include <vector>
+#include "qasymm8.hpp"
+
+
+namespace qsymm8 {
+
+struct QSymm8Params {
+  int8_t quantize(float value) const;
+  float dequantize(int8_t value) const;
+
+  float scale;
+};
+
+struct QSymm8RescaleParams {
+  static QSymm8RescaleParams
+  make_rescale_params(const QSymm8Params &weight_quant,
+                      const QSymm8Params &input_quant,
+                      const QSymm8Params &output_quant);
+
+  QSymm8RescaleParams(int32_t shift, int32_t multiplier, float rescale);
+
+  const int32_t shift, multiplier;
+  const float rescale;
+};
+
+struct QSymm8PerChannelParams {
+  int8_t quantize(float value, float scale) const;
+  float dequantize(int8_t value, float scale) const;
+
+  std::vector<float> scales;
+};
+
+struct QSymm8PerChannelRescaleParams {
+  static QSymm8PerChannelRescaleParams
+  make_rescale_params(const QSymm8PerChannelParams &weight_quant,
+                      const QSymm8PerChannelParams &input_quant,
+                      const QSymm8PerChannelParams &output_quant);
+
+  static QSymm8PerChannelRescaleParams
+  make_rescale_params(const QSymm8PerChannelParams &weight_quant,
+                      const qasymm8::QAsymm8Params &input_quant,
+                      const qasymm8::QAsymm8Params &output_quant);
+
+  QSymm8PerChannelRescaleParams(std::vector<int32_t>& shift, std::vector<int32_t>& multiplier, std::vector<float>& rescale);
+
+  std::vector<int32_t>  shifts, multipliers;
+  std::vector<float> rescales;
+};
+
+} // namespace qsymm8