Make CpuActivation stateless

- Rename NEActivationLayer to CpuActivation
- Add member function to generate execution window

Partially Resolves: COMPMID-3992

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I4e1ae15cf456b860d3080b2fedc4dbcce7d1bb79
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4791
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/src/core/cpu/kernels/floor/NEON/fp32.cpp b/src/core/cpu/kernels/floor/NEON/fp32.cpp
new file mode 100644
index 0000000000..dd63f9f9d7
--- /dev/null
+++ b/src/core/cpu/kernels/floor/NEON/fp32.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2020-2021 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.
+ */
+#include "src/core/NEON/NEMath.h"
+#include "src/core/common/Validate.h"
+
+#include <arm_neon.h>
+#include <cmath>
+#include <cstddef>
+
+namespace arm_compute
+{
+namespace cpu
+{
+constexpr int step = 4;
+
+void fp32_neon_floor(const void *src, void *dst, int len)
+{
+    ARM_COMPUTE_ASSERT_NOT_NULLPTR(src);
+    ARM_COMPUTE_ASSERT_NOT_NULLPTR(dst);
+    ARM_COMPUTE_ASSERT(len >= 0);
+
+    auto psrc = static_cast<const float *>(src);
+    auto pdst = static_cast<float *>(dst);
+
+    for(; len >= step; len -= step)
+    {
+        vst1q_f32(pdst, vfloorq_f32(vld1q_f32(psrc)));
+        psrc += step;
+        pdst += step;
+    }
+
+    for(; len > 0; --len)
+    {
+        *pdst = std::floor(*psrc);
+        ++pdst;
+        ++psrc;
+    }
+}
+} // namespace cpu
+} // namespace arm_compute