Add SVE support to elementwise unary kernels

It also includes decoupling of kernels using different
data types.

Partially implements: COMPMID-3872

Change-Id: I226cb9e55a5d9f8a0c63e37631f087af45f2d640
Signed-off-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4711
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>

1 files changed, 116 insertions, 0 deletions

diff --git a/src/core/NEON/kernels/elementwise/impl/elementwise_unary_list.h b/src/core/NEON/kernels/elementwise/impl/elementwise_unary_list.h
new file mode 100644
index 0000000000..307e95fae9
--- /dev/null
+++ b/src/core/NEON/kernels/elementwise/impl/elementwise_unary_list.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 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.
+ */
+#ifndef SRC_CORE_NEON_KERNELS_ELEMENTWISE_UNARY_LIST_H
+#define SRC_CORE_NEON_KERNELS_ELEMENTWISE_UNARY_LIST_H
+
+#include "arm_compute/core/Types.h"
+#include "src/core/NEON/wrapper/intrinsics/intrinsics.h"
+
+namespace arm_compute
+{
+namespace cpu
+{
+template <typename ScalarType>
+inline ScalarType elementwise_op_scalar_imp(ElementWiseUnary op, const ScalarType &a)
+{
+    switch(op)
+    {
+        case ElementWiseUnary::RSQRT:
+            return 1 / sqrt(a);
+        case ElementWiseUnary::EXP:
+            return std::exp(a);
+        case ElementWiseUnary::NEG:
+            return -a;
+        case ElementWiseUnary::LOG:
+            return std::log(a);
+        case ElementWiseUnary::ABS:
+            return std::abs(a);
+        case ElementWiseUnary::ROUND:
+            return support::cpp11::nearbyint(a);
+        case ElementWiseUnary::SIN:
+            return std::sin(a);
+        default:
+            ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
+    }
+}
+
+template <typename ScalarType, typename VectorType>
+inline VectorType elementwise_op_imp(ElementWiseUnary op, const VectorType &a)
+{
+    switch(op)
+    {
+        case ElementWiseUnary::RSQRT:
+            return wrapper::vinvsqrt(a);
+        case ElementWiseUnary::EXP:
+            return wrapper::vexpq(a);
+        case ElementWiseUnary::NEG:
+            return wrapper::vneg(a);
+        case ElementWiseUnary::LOG:
+            return wrapper::vlog(a);
+        case ElementWiseUnary::ABS:
+            return wrapper::vabs(a);
+        case ElementWiseUnary::ROUND:
+            return wrapper::vround(a);
+        case ElementWiseUnary::SIN:
+            return wrapper::vsin(a);
+        default:
+            ARM_COMPUTE_ERROR("NOT_SUPPORTED!");
+    }
+}
+
+template <typename ScalarType>
+void elementwise_op(const ITensor *in, ITensor *out, const Window &window, ElementWiseUnary op)
+{
+    const int  window_step_x  = 16 / sizeof(ScalarType);
+    const auto window_start_x = static_cast<int>(window.x().start());
+    const auto window_end_x   = static_cast<int>(window.x().end());
+
+    Window win = window;
+    win.set(Window::DimX, Window::Dimension(0, 1, 1));
+
+    Iterator input(in, win);
+    Iterator output(out, win);
+
+    execute_window_loop(win, [&](const Coordinates &)
+    {
+        auto       output_ptr = reinterpret_cast<ScalarType *>(output.ptr());
+        const auto input_ptr  = reinterpret_cast<const ScalarType *>(input.ptr());
+
+        int x = window_start_x;
+        for(; x <= window_end_x - window_step_x; x += window_step_x)
+        {
+            wrapper::vstore(output_ptr + x, elementwise_op_imp<ScalarType>(op, wrapper::vloadq(input_ptr + x)));
+        }
+        for(; x < window_end_x; ++x)
+        {
+            *(output_ptr + x) = elementwise_op_scalar_imp(op, *(input_ptr + x));
+        }
+    },
+    input, output);
+}
+
+} // namespace cpu
+} // namespace arm_compute
+
+#endif // SRC_CORE_NEON_KERNELS_ELEMENTWISE_UNARY_LIST_H
\ No newline at end of file