Add SVE support and decouple data type for NEScaleKernel

- Decouple data type for NEON NHWC implementation, supported data types are: fp32, fp16, u8, s16, qasymm8, qasymm8_signed.

- Add SVE support for NHWC and all six data types showed above.

Resolves: COMPMID-3873

Change-Id: I097de119f4667b28b025a78cadf7185afa5f15f0
Signed-off-by: Sheri Zhang <sheri.zhang@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4766
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Marquez Tello <pablo.tello@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 177 insertions, 0 deletions

diff --git a/src/core/NEON/kernels/scale/impl/SVE/fp16.cpp b/src/core/NEON/kernels/scale/impl/SVE/fp16.cpp
new file mode 100644
index 0000000000..91c3dc3b4e
--- /dev/null
+++ b/src/core/NEON/kernels/scale/impl/SVE/fp16.cpp
@@ -0,0 +1,177 @@
+/*
+ * 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.
+ */
+#include "arm_compute/core/Helpers.h"
+#include "arm_compute/core/ITensorPack.h"
+#include "arm_compute/core/Window.h"
+#include "src/core/NEON/NEMath.h"
+#include "src/core/NEON/wrapper/wrapper.h"
+#include "src/core/common/Validate.h"
+#include "src/core/helpers/ScaleHelpers.h"
+#include "src/core/utils/ScaleUtils.h"
+#include "support/Rounding.h"
+
+#include <cmath>
+#include <cstddef>
+
+#if defined(__ARM_FEATURE_SVE)
+#include <arm_sve.h>
+
+namespace arm_compute
+{
+namespace
+{
+void fp16_sve_scale_nearest(const ITensor *src, ITensor *dst, const ITensor *offsets,
+                            float sampling_offset, bool align_corners, const Window &window)
+{
+    const size_t in_stride_c  = src->info()->dimension(0) + src->info()->padding().left + src->info()->padding().right;
+    const size_t in_stride_w  = src->info()->dimension(1) + src->info()->padding().top + src->info()->padding().bottom;
+    const size_t in_stride_wc = in_stride_w * in_stride_c;
+    const size_t in_dim_h     = src->info()->dimension(2);
+
+    // Compute the ratio between source height and destination height
+    const auto hr             = scale_utils::calculate_resize_ratio(in_dim_h, dst->info()->dimension(2), align_corners);
+    const auto window_start_x = static_cast<int32_t>(window.x().start());
+    const auto window_end_x   = static_cast<int32_t>(window.x().end());
+
+    Window win(window);
+    win.set(Window::DimX, Window::Dimension(0, 1, 1));
+    Iterator out(dst, win);
+
+    const uint8_t     *in_ptr_start        = src->buffer() + src->info()->offset_first_element_in_bytes();
+    const unsigned int in_stride_bytes_hwc = src->info()->strides_in_bytes()[3];
+
+    execute_window_loop(win, [&](const Coordinates & id)
+    {
+        const int32_t offset     = *reinterpret_cast<const int32_t *>(offsets->ptr_to_element(Coordinates(id.y(), id.z()))) * in_stride_c;
+        const auto    in_hi      = static_cast<int>(align_corners ? utils::rounding::round_half_away_from_zero((id.z() + sampling_offset) * hr) : std::floor((id.z() + sampling_offset) * hr));
+        const int     offset_row = in_hi * in_stride_wc;
+        const auto    in_ptr     = reinterpret_cast<const float16_t *>(in_ptr_start + in_stride_bytes_hwc * id[3]);
+        const auto    out_ptr    = reinterpret_cast<float16_t *>(out.ptr());
+
+        // Compute S elements per iteration
+        int      x  = window_start_x;
+        svbool_t pg = svwhilelt_b16(x, window_end_x);
+        do
+        {
+            // Store results
+            svst1_f16(pg, out_ptr + x, svld1_f16(pg, in_ptr + offset + offset_row + x));
+
+            x += svcntw();
+            pg = svwhilelt_b16(x, window_end_x);
+        }
+        while(svptest_any(svptrue_b16(), pg));
+    },
+    out);
+}
+
+void fp16_sve_scale_bilinear(const ITensor *src, ITensor *dst, const ITensor *offsets, const ITensor *dx, const ITensor *dy,
+                             BorderMode border_mode, PixelValue constant_border_value, float sampling_offset,
+                             bool align_corners, const Window &window)
+{
+    // Compute the ratio between source height and destination height
+    const auto hr = scale_utils::calculate_resize_ratio(src->info()->dimension(2), dst->info()->dimension(2), align_corners);
+
+    Iterator  out(dst, window);
+    const int in_stride_c  = src->info()->dimension(0) + src->info()->padding().left + src->info()->padding().right;
+    const int in_dim_w     = src->info()->dimension(1);
+    const int in_dim_h     = src->info()->dimension(2);
+    const int in_stride_wc = in_stride_c * (in_dim_w + src->info()->padding().top + src->info()->padding().bottom);
+
+    // Don't increment in Y and Z direction for the input tensor
+    // A pointer to the start of this plane is needed as base for the precomputed offsets
+    Window win_in(window);
+    win_in.set(Window::DimY, Window::Dimension(0, 0, 0));
+    win_in.set(Window::DimZ, Window::Dimension(0, 0, 0));
+    Iterator in(src, win_in);
+
+    if(border_mode == BorderMode::CONSTANT)
+    {
+        using ConstType = typename std::conditional<std::is_same<float16_t, float16_t>::value, half, float16_t>::type;
+
+        const float16_t const_border_value = static_cast<float16_t>(constant_border_value.get<ConstType>());
+        execute_window_loop(window, [&](const Coordinates & id)
+        {
+            const auto       offset = *reinterpret_cast<const int32_t *>(offsets->ptr_to_element(Coordinates(id.y(), id.z())));
+            const auto       dx_val = *reinterpret_cast<const float *>(dx->ptr_to_element(Coordinates(id.y(), id.z())));
+            const auto       dy_val = *reinterpret_cast<const float *>(dy->ptr_to_element(Coordinates(id.y(), id.z())));
+            const int32_t    in_hi  = std::floor((id.z() + sampling_offset) * hr - sampling_offset);
+            const float16_t *in_ptr = reinterpret_cast<const float16_t *>(in.ptr()) + offset * in_stride_c + in_hi * in_stride_wc;
+
+            const auto a00 = (0 <= offset && offset < in_dim_w && 0 <= in_hi && in_hi < in_dim_h) ? *in_ptr : const_border_value;
+            const auto a01 = (-1 <= offset && offset < in_dim_w - 1 && 0 <= in_hi && in_hi < in_dim_h) ? *(in_ptr + in_stride_c) : const_border_value;
+            const auto a10 = (0 <= offset && offset < in_dim_w && -1 <= in_hi && in_hi < in_dim_h - 1) ? *(in_ptr + in_stride_wc) : const_border_value;
+            const auto a11 = (-1 <= offset && offset < in_dim_w - 1 && -1 <= in_hi && in_hi < in_dim_h - 1) ? *(in_ptr + in_stride_c + in_stride_wc) : const_border_value;
+
+            *reinterpret_cast<float16_t *>(out.ptr()) = static_cast<float16_t>(scale_helpers::delta_bilinear(a00, a01, a10, a11, dx_val, dy_val));
+        },
+        in, out);
+    }
+    else if(border_mode == BorderMode::REPLICATE)
+    {
+        execute_window_loop(window, [&](const Coordinates & id)
+        {
+            const auto offset = *reinterpret_cast<const int32_t *>(offsets->ptr_to_element(Coordinates(id.y(), id.z())));
+            const auto dx_val = *reinterpret_cast<const float *>(dx->ptr_to_element(Coordinates(id.y(), id.z())));
+            const auto dy_val = *reinterpret_cast<const float *>(dy->ptr_to_element(Coordinates(id.y(), id.z())));
+            const int  in_hi  = std::floor((id.z() + sampling_offset) * hr - sampling_offset);
+
+            auto clamped_w  = utility::clamp<int>(offset, 0, in_dim_w - 1);
+            auto clamped_w1 = utility::clamp<int>(offset + 1, 0, in_dim_w - 1);
+            auto clamped_h  = utility::clamp<int>(in_hi, 0, in_dim_h - 1);
+            auto clamped_h1 = utility::clamp<int>(in_hi + 1, 0, in_dim_h - 1);
+
+            const auto a00 = *(reinterpret_cast<const float16_t *>(in.ptr()) + clamped_w * in_stride_c + clamped_h * in_stride_wc);
+            const auto a01 = *(reinterpret_cast<const float16_t *>(in.ptr()) + clamped_w1 * in_stride_c + clamped_h * in_stride_wc);
+            const auto a10 = *(reinterpret_cast<const float16_t *>(in.ptr()) + clamped_w * in_stride_c + clamped_h1 * in_stride_wc);
+            const auto a11 = *(reinterpret_cast<const float16_t *>(in.ptr()) + clamped_w1 * in_stride_c + clamped_h1 * in_stride_wc);
+
+            *reinterpret_cast<float16_t *>(out.ptr()) = static_cast<float16_t>(scale_helpers::delta_bilinear(a00, a01, a10, a11, dx_val, dy_val));
+        },
+        in, out);
+    }
+    else
+    {
+        ARM_COMPUTE_ERROR("Not implemented");
+    }
+}
+}
+namespace cpu
+{
+void fp16_sve_scale(const ITensor *src, ITensor *dst, const ITensor *offsets, const ITensor *dx, const ITensor *dy,
+                    InterpolationPolicy policy, BorderMode border_mode, PixelValue constant_border_value, float sampling_offset,
+                    bool align_corners, const Window &window)
+{
+    if(policy == InterpolationPolicy::BILINEAR)
+    {
+        fp16_sve_scale_bilinear(src, dst, offsets, dx, dy, border_mode, constant_border_value, sampling_offset, align_corners, window);
+    }
+    else if(policy == InterpolationPolicy::NEAREST_NEIGHBOR)
+    {
+        fp16_sve_scale_nearest(src, dst, offsets, sampling_offset, align_corners, window);
+    }
+}
+} // namespace cpu
+} // namespace arm_compute
+
+#endif // __ARM_FEATURE_SVE
\ No newline at end of file