COMPMID-906: Use fused activation in NEON Batch normalization

Change-Id: I5a6413548b2c9b8972c91ddba57395509dffd87e
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/120656
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/arm_compute/core/NEON/kernels/detail/NEActivationFunctionDetail.h b/arm_compute/core/NEON/kernels/detail/NEActivationFunctionDetail.h
new file mode 100644
index 0000000000..e4d3f54943
--- /dev/null
+++ b/arm_compute/core/NEON/kernels/detail/NEActivationFunctionDetail.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2018 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.
+ */
+#ifndef __ARM_COMPUTE_DETAIL_NEACTIVATION_FUNCTION_DETAIL_H__
+#define __ARM_COMPUTE_DETAIL_NEACTIVATION_FUNCTION_DETAIL_H__
+
+#include "arm_compute/core/NEON/wrapper/wrapper.h"
+
+namespace arm_compute
+{
+namespace detail
+{
+// Dummy activation object
+/** Dummy activation object */
+template <typename T, int S>
+struct dummy
+{
+    using ExactType = typename wrapper::traits::neon_vector<T, S>::type;
+
+    explicit dummy(ActivationLayerInfo act_info)
+    {
+        ARM_COMPUTE_UNUSED(act_info);
+    }
+    void operator()(ExactType &vval)
+    {
+        ARM_COMPUTE_UNUSED(vval);
+    }
+};
+/** RELU activation object */
+template <typename T, int S>
+struct relu
+{
+    using ExactType    = typename wrapper::traits::neon_vector<T, S>::type;
+    using ExactTagType = typename wrapper::traits::neon_vector<T, S>::tag_type;
+
+    explicit relu(ActivationLayerInfo act_info)
+        : vzero(wrapper::vdup_n(static_cast<T>(0.f), ExactTagType{}))
+    {
+        ARM_COMPUTE_UNUSED(act_info);
+    }
+
+    void operator()(ExactType &vval)
+    {
+        vval = wrapper::vmax(vzero, vval);
+    }
+
+    const ExactType vzero;
+};
+/** Bounded RELU activation object */
+template <typename T, int S>
+struct brelu
+{
+    using ExactType    = typename wrapper::traits::neon_vector<T, S>::type;
+    using ExactTagType = typename wrapper::traits::neon_vector<T, S>::tag_type;
+
+    explicit brelu(ActivationLayerInfo act_info)
+        : vzero(wrapper::vdup_n(static_cast<T>(0.f), ExactTagType{})),
+          valpha(wrapper::vdup_n(static_cast<T>(act_info.a()), ExactTagType{}))
+    {
+    }
+
+    void operator()(ExactType &vval)
+    {
+        vval = wrapper::vmin(valpha, wrapper::vmax(vzero, vval));
+    }
+
+    const ExactType vzero;
+    const ExactType valpha;
+};
+/** Lower-Upper Bounded RELU activation object */
+template <typename T, int S>
+struct lubrelu
+{
+    using ExactType    = typename wrapper::traits::neon_vector<T, S>::type;
+    using ExactTagType = typename wrapper::traits::neon_vector<T, S>::tag_type;
+
+    explicit lubrelu(ActivationLayerInfo act_info)
+        : valpha(wrapper::vdup_n(static_cast<T>(act_info.a()), ExactTagType{})),
+          vbeta(wrapper::vdup_n(static_cast<T>(act_info.b()), ExactTagType{}))
+    {
+    }
+
+    void operator()(ExactType &vval)
+    {
+        vval = wrapper::vmin(valpha, wrapper::vmax(vbeta, vval));
+    }
+
+    const ExactType valpha;
+    const ExactType vbeta;
+};
+} // namespace detail
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_DETAIL_NEACTIVATION_FUNCTION_DETAIL_H__ */