Move CPU/GPU files from Core/Runtime to the respective backend folders

Legacy structure contained two libraries core/runtime with two backends
in each.
We reduce the core/runtime libraries to a single library thus merging
the backend files

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I69545765fe7a730368105cdbd067d3135ec7a174
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/6155
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/gpu/cl/kernels/gemm/reshaped_only_rhs/ClGemmDefaultConfigReshapedRhsOnlyValhall.cpp b/src/gpu/cl/kernels/gemm/reshaped_only_rhs/ClGemmDefaultConfigReshapedRhsOnlyValhall.cpp
new file mode 100644
index 0000000..a82084a
--- /dev/null
+++ b/src/gpu/cl/kernels/gemm/reshaped_only_rhs/ClGemmDefaultConfigReshapedRhsOnlyValhall.cpp
@@ -0,0 +1,570 @@
+/*
+ * 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/gpu/cl/kernels/gemm/reshaped_only_rhs/ClGemmDefaultConfigReshapedRhsOnlyValhall.h"
+
+#include "arm_compute/core/CL/CLHelpers.h"
+#include "arm_compute/core/CL/CLKernelLibrary.h"
+#include "arm_compute/core/GPUTarget.h"
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/TensorShape.h"
+#include "arm_compute/core/utils/misc/ShapeCalculator.h"
+#include "src/gpu/cl/kernels/gemm/ClGemmHelpers.h"
+
+#include <utility>
+
+namespace arm_compute
+{
+namespace opencl
+{
+namespace kernels
+{
+namespace gemm
+{
+using namespace arm_compute::misc::shape_calculator;
+
+ClGemmDefaultConfigReshapedRhsOnlyValhall::ClGemmDefaultConfigReshapedRhsOnlyValhall(GPUTarget gpu)
+    : IClGemmKernelConfig(gpu)
+{
+}
+
+std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> ClGemmDefaultConfigReshapedRhsOnlyValhall::configure(unsigned int m, unsigned int n, unsigned int k, unsigned int b, DataType data_type)
+{
+    using ConfigurationFunctionExecutorPtr = std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> (ClGemmDefaultConfigReshapedRhsOnlyValhall::*)(unsigned int m, unsigned int n, unsigned int k,
+                                             unsigned int b);
+
+    CLGEMMConfigArray<ConfigurationFunctionExecutorPtr> configs_G77(&ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G77_f32,
+                                                                    &ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G77_f16,
+                                                                    &ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G77_u8);
+
+    CLGEMMConfigArray<ConfigurationFunctionExecutorPtr> configs_G78(&ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G78_f32,
+                                                                    &ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G78_f16,
+                                                                    &ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G77_u8);
+
+    ConfigurationFunctionExecutorPtr func = nullptr;
+
+    switch(_target)
+    {
+        case GPUTarget::G78:
+            func = configs_G78.get_function(data_type);
+            break;
+        case GPUTarget::G77:
+        default:
+            func = configs_G77.get_function(data_type);
+            break;
+    }
+
+    ARM_COMPUTE_ERROR_ON_MSG(func == nullptr, "Data type not support for GEMM");
+    return (this->*func)(m, n, k, b);
+}
+
+std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G77_f32(unsigned int m, unsigned int n, unsigned int k, unsigned int b)
+{
+    if(m == 1)
+    {
+        const float r_mn = static_cast<float>(m) / static_cast<float>(n);
+        const float r_mk = static_cast<float>(m) / static_cast<float>(k);
+
+        if(r_mk <= 0.0064484127797186375)
+        {
+            if(r_mn <= 0.0028273810748942196)
+            {
+                GEMMLHSMatrixInfo lhs_info_buf;
+                GEMMRHSMatrixInfo rhs_info_buf;
+                GEMMLHSMatrixInfo lhs_info_img;
+                GEMMRHSMatrixInfo rhs_info_img;
+
+                const unsigned int h0 = std::max(n / 4, 1U);
+                std::tie(lhs_info_img, rhs_info_img) = configure_lhs_rhs_info(m, n, 1, 4, 8, 1, 16, 0, 1, 0, 0, 1);
+                std::tie(lhs_info_buf, rhs_info_buf) = configure_lhs_rhs_info(m, n, 1, 4, 4, 1, h0, 0, 1, 0, 1, 0);
+
+                return select_lhs_rhs_info(std::make_pair(lhs_info_img, rhs_info_img),
+                                           std::make_pair(lhs_info_buf, rhs_info_buf),
+                                           n, k, b, DataType::F32);
+            }
+            else
+            {
+                return configure_lhs_rhs_info(m, n, 1, 2, 16, 1, 8, 0, 1, 0, 0, 0);
+            }
+        }
+        else
+        {
+            if(r_mk <= 0.020312500186264515)
+            {
+                return configure_lhs_rhs_info(m, n, 1, 2, 16, 1, 4, 0, 1, 0, 0, 0);
+            }
+            else
+            {
+                return configure_lhs_rhs_info(m, n, 1, 4, 16, 1, 16, 0, 1, 0, 1, 0);
+            }
+        }
+    }
+    else
+    {
+        const float r_mn     = static_cast<float>(m) / static_cast<float>(n);
+        const float workload = (static_cast<float>(m) * static_cast<float>(n) * static_cast<float>(b)) / 20.0f;
+        const float r_mk     = static_cast<float>(m) / static_cast<float>(k);
+
+        if(workload <= 1999.2000122070312)
+        {
+            if(workload <= 747.1999816894531)
+            {
+                return configure_lhs_rhs_info(m, n, 2, 2, 4, 1, 8, 0, 1, 0, 1, 0);
+            }
+            else
+            {
+                GEMMLHSMatrixInfo lhs_info_buf;
+                GEMMRHSMatrixInfo rhs_info_buf;
+                GEMMLHSMatrixInfo lhs_info_img;
+                GEMMRHSMatrixInfo rhs_info_img;
+                std::tie(lhs_info_img, rhs_info_img) = configure_lhs_rhs_info(m, n, 2, 4, 8, 1, 2, 0, 0, 0, 1, 1);
+                std::tie(lhs_info_buf, rhs_info_buf) = configure_lhs_rhs_info(m, n, 2, 2, 4, 1, 8, 0, 1, 0, 1, 0);
+
+                return select_lhs_rhs_info(std::make_pair(lhs_info_img, rhs_info_img),
+                                           std::make_pair(lhs_info_buf, rhs_info_buf),
+                                           n, k, b, DataType::F32);
+            }
+        }
+        else
+        {
+            if(r_mn <= 0.03348214365541935)
+            {
+                if(r_mk <= 0.028125000186264515)
+                {
+                    return configure_lhs_rhs_info(m, n, 2, 2, 4, 1, 8, 0, 1, 0, 1, 0);
+                }
+                else
+                {
+                    GEMMLHSMatrixInfo lhs_info_buf;
+                    GEMMRHSMatrixInfo rhs_info_buf;
+                    GEMMLHSMatrixInfo lhs_info_img;
+                    GEMMRHSMatrixInfo rhs_info_img;
+                    std::tie(lhs_info_img, rhs_info_img) = configure_lhs_rhs_info(m, n, 2, 4, 8, 1, 2, 0, 0, 0, 1, 1);
+                    std::tie(lhs_info_buf, rhs_info_buf) = configure_lhs_rhs_info(m, n, 2, 2, 4, 1, 8, 0, 1, 0, 1, 0);
+
+                    return select_lhs_rhs_info(std::make_pair(lhs_info_img, rhs_info_img),
+                                               std::make_pair(lhs_info_buf, rhs_info_buf),
+                                               n, k, b, DataType::F32);
+                }
+            }
+            else
+            {
+                GEMMLHSMatrixInfo lhs_info_buf;
+                GEMMRHSMatrixInfo rhs_info_buf;
+                GEMMLHSMatrixInfo lhs_info_img;
+                GEMMRHSMatrixInfo rhs_info_img;
+                std::tie(lhs_info_img, rhs_info_img) = configure_lhs_rhs_info(m, n, 4, 4, 4, 1, 2, 0, 1, 0, 0, 1);
+                std::tie(lhs_info_buf, rhs_info_buf) = configure_lhs_rhs_info(m, n, 4, 4, 4, 1, 16, 0, 1, 0, 1, 0);
+
+                return select_lhs_rhs_info(std::make_pair(lhs_info_img, rhs_info_img),
+                                           std::make_pair(lhs_info_buf, rhs_info_buf),
+                                           n, k, b, DataType::F32);
+            }
+        }
+    }
+}
+
+std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G77_f16(unsigned int m, unsigned int n, unsigned int k, unsigned int b)
+{
+    ARM_COMPUTE_UNUSED(k);
+    ARM_COMPUTE_UNUSED(b);
+
+    if(m == 1)
+    {
+        const unsigned int h0 = std::max(n / 2, 1U);
+        if(n <= 836.0)
+        {
+            return configure_lhs_rhs_info(m, n, 1, 2, 16, 1, h0, 0, 1, 0, 1, 0);
+        }
+        else
+        {
+            return configure_lhs_rhs_info(m, n, 1, 2, 8, 1, h0, 0, 1, 0, 1, 0);
+        }
+    }
+    else if(m < 128)
+    {
+        const int h0 = std::max(std::min(static_cast<int>(n / 4), static_cast<int>(256)), static_cast<int>(1));
+        if(k >= 512)
+        {
+            return configure_lhs_rhs_info(m, n, 2, 4, 16, 1, h0, 0, 1, 0, 0);
+        }
+        else
+        {
+            return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, h0, 0, 1, 0, 0);
+        }
+    }
+    else
+    {
+        const int h0 = std::max(std::min(static_cast<int>(n / 4), static_cast<int>(256)), static_cast<int>(1));
+        if(n >= 64)
+        {
+            return configure_lhs_rhs_info(m, n, 4, 8, 4, 1, h0, 0, 1, 0, 0);
+        }
+        else
+        {
+            if(k >= 512)
+            {
+                return configure_lhs_rhs_info(m, n, 2, 4, 16, 1, h0, 0, 1, 0, 0);
+            }
+            else
+            {
+                return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, h0, 0, 1, 0, 0);
+            }
+        }
+    }
+}
+
+std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G77_u8(unsigned int m, unsigned int n, unsigned int k, unsigned int b)
+{
+    ARM_COMPUTE_UNUSED(k);
+    ARM_COMPUTE_UNUSED(b);
+
+    if(m == 1)
+    {
+        const unsigned int h0 = std::max(n / 2, 1U);
+        return configure_lhs_rhs_info(m, n, 1, 4, 16, 1, h0, 0, 1, 0, 1);
+    }
+    else
+    {
+        const int h0 = std::max(std::min(static_cast<int>(n / 4), static_cast<int>(256)), static_cast<int>(1));
+        if(m >= 28)
+        {
+            return configure_lhs_rhs_info(m, n, 4, 4, 16, 1, h0, 0, 1, 0, 1);
+        }
+        else
+        {
+            return configure_lhs_rhs_info(m, n, 2, 4, 16, 1, h0, 0, 1, 0, 1);
+        }
+    }
+}
+
+std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G78_f32(unsigned int m, unsigned int n, unsigned int k, unsigned int b)
+{
+    const float r_mn     = static_cast<float>(m) / static_cast<float>(n);
+    const float r_mk     = static_cast<float>(m) / static_cast<float>(k);
+    const float r_nk     = static_cast<float>(n) / static_cast<float>(k);
+    const float workload = (static_cast<float>(m) * static_cast<float>(n) * static_cast<float>(b)) / 20.0f;
+
+    if(m == 1)
+    {
+        if(workload <= 278.7000f)
+        {
+            if(workload <= 7.5000f)
+            {
+                return configure_lhs_rhs_info(m, n, 1, 2, 8, 1, 2, 0, 1, 1, 0, 0);
+            }
+            else
+            {
+                if(r_mn <= 0.0031f)
+                {
+                    if(workload <= 256.6000f)
+                    {
+                        if(workload <= 16.7500f)
+                        {
+                            if(r_nk <= 1.6671f)
+                            {
+                                return configure_lhs_rhs_info(m, n, 1, 2, 2, 1, 32, 0, 0, 0, 1, 0);
+                            }
+                            else
+                            {
+                                return configure_lhs_rhs_info(m, n, 1, 2, 8, 1, 2, 0, 1, 1, 0, 0);
+                            }
+                        }
+                        else
+                        {
+                            return configure_lhs_rhs_info(m, n, 1, 2, 2, 1, 32, 0, 0, 0, 1, 0);
+                        }
+                    }
+                    else
+                    {
+                        return configure_lhs_rhs_info(m, n, 1, 2, 2, 1, 32, 0, 0, 0, 1, 0);
+                    }
+                }
+                else
+                {
+                    if(r_mk <= 0.0027f)
+                    {
+                        if(r_mk <= 0.0014f)
+                        {
+                            return configure_lhs_rhs_info(m, n, 1, 2, 2, 1, 32, 0, 0, 0, 1, 0);
+                        }
+                        else
+                        {
+                            if(workload <= 8.9500f)
+                            {
+                                return configure_lhs_rhs_info(m, n, 1, 2, 8, 1, 2, 0, 1, 1, 0, 0);
+                            }
+                            else
+                            {
+                                return configure_lhs_rhs_info(m, n, 1, 2, 2, 1, 32, 0, 0, 0, 1, 0);
+                            }
+                        }
+                    }
+                    else
+                    {
+                        if(workload <= 14.1500f)
+                        {
+                            return configure_lhs_rhs_info(m, n, 1, 2, 8, 1, 2, 0, 1, 1, 0, 0);
+                        }
+                        else
+                        {
+                            if(r_mk <= 0.0041f)
+                            {
+                                return configure_lhs_rhs_info(m, n, 1, 2, 2, 1, 32, 0, 0, 0, 1, 0);
+                            }
+                            else
+                            {
+                                return configure_lhs_rhs_info(m, n, 1, 2, 8, 1, 2, 0, 1, 1, 0, 0);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        else
+        {
+            if(workload <= 363.7000f)
+            {
+                if(r_mk <= 0.0031f)
+                {
+                    return configure_lhs_rhs_info(m, n, 1, 4, 2, 1, 32, 0, 1, 0, 1, 0);
+                }
+                else
+                {
+                    return configure_lhs_rhs_info(m, n, 1, 4, 4, 1, 32, 0, 1, 0, 1, 0);
+                }
+            }
+            else
+            {
+                return configure_lhs_rhs_info(m, n, 1, 4, 2, 1, 32, 0, 1, 0, 1, 0);
+            }
+        }
+    }
+    else
+    {
+        if(workload <= 1384.8000f)
+        {
+            if(workload <= 704.0000f)
+            {
+                return configure_lhs_rhs_info(m, n, 2, 2, 4, 1, 32, 0, 1, 0, 1, 0);
+            }
+            else
+            {
+                return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, 4, 0, 0, 0, 1, 1);
+            }
+        }
+        else
+        {
+            if(workload <= 16761.6006f)
+            {
+                if(r_mn <= 187.1250f)
+                {
+                    return configure_lhs_rhs_info(m, n, 4, 4, 4, 1, 16, 0, 0, 0, 1, 1);
+                }
+                else
+                {
+                    return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, 4, 0, 0, 0, 1, 1);
+                }
+            }
+            else
+            {
+                if(r_mk <= 432.4630f)
+                {
+                    return configure_lhs_rhs_info(m, n, 5, 4, 4, 1, 16, 0, 0, 0, 1, 1);
+                }
+                else
+                {
+                    return configure_lhs_rhs_info(m, n, 2, 4, 4, 1, 16, 0, 1, 0, 1, 1);
+                }
+            }
+        }
+    }
+}
+
+std::pair<GEMMLHSMatrixInfo, GEMMRHSMatrixInfo> ClGemmDefaultConfigReshapedRhsOnlyValhall::configure_G78_f16(unsigned int m, unsigned int n, unsigned int k, unsigned int b)
+{
+    const float r_mn     = static_cast<float>(m) / static_cast<float>(n);
+    const float r_mk     = static_cast<float>(m) / static_cast<float>(k);
+    const float r_nk     = static_cast<float>(n) / static_cast<float>(k);
+    const float workload = (static_cast<float>(m) * static_cast<float>(n) * static_cast<float>(b)) / 20.0f;
+
+    if(m == 1)
+    {
+        if(r_mn <= 0.0038f)
+        {
+            if(workload <= 353.9000f)
+            {
+                if(workload <= 278.7000f)
+                {
+                    return configure_lhs_rhs_info(m, n, 1, 2, 4, 1, 32, 0, 0, 1, 0, 0);
+                }
+                else
+                {
+                    if(r_mk <= 0.0004f)
+                    {
+                        return configure_lhs_rhs_info(m, n, 1, 2, 4, 1, 32, 0, 0, 1, 0, 0);
+                    }
+                    else
+                    {
+                        if(r_mk <= 0.0030f)
+                        {
+                            return configure_lhs_rhs_info(m, n, 1, 8, 4, 1, 8, 0, 1, 1, 0, 1);
+                        }
+                        else
+                        {
+                            return configure_lhs_rhs_info(m, n, 1, 2, 4, 1, 32, 0, 0, 1, 0, 0);
+                        }
+                    }
+                }
+            }
+            else
+            {
+                if(r_nk <= 1.9384f)
+                {
+                    return configure_lhs_rhs_info(m, n, 1, 2, 4, 1, 32, 0, 0, 1, 0, 0);
+                }
+                else
+                {
+                    return configure_lhs_rhs_info(m, n, 1, 8, 4, 1, 8, 0, 1, 1, 0, 1);
+                }
+            }
+        }
+        else
+        {
+            if(r_nk <= 1.0368f)
+            {
+                return configure_lhs_rhs_info(m, n, 1, 2, 16, 1, 32, 0, 0, 1, 0, 0);
+            }
+            else
+            {
+                return configure_lhs_rhs_info(m, n, 1, 2, 4, 1, 32, 0, 0, 1, 0, 0);
+            }
+        }
+    }
+    else
+    {
+        if(workload <= 1422.4000f)
+        {
+            if(workload <= 704.0000f)
+            {
+                return configure_lhs_rhs_info(m, n, 2, 2, 8, 1, 32, 0, 0, 1, 0, 0);
+            }
+            else
+            {
+                if(workload <= 1197.6000f)
+                {
+                    return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, 8, 0, 1, 1, 0, 1);
+                }
+                else
+                {
+                    if(workload <= 1241.6000f)
+                    {
+                        return configure_lhs_rhs_info(m, n, 2, 8, 8, 1, 16, 0, 1, 1, 0, 0);
+                    }
+                    else
+                    {
+                        return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, 8, 0, 1, 1, 0, 1);
+                    }
+                }
+            }
+        }
+        else
+        {
+            if(workload <= 2769.6000f)
+            {
+                if(workload <= 1846.4000f)
+                {
+                    if(r_mn <= 2.4927f)
+                    {
+                        return configure_lhs_rhs_info(m, n, 2, 8, 8, 1, 16, 0, 1, 1, 0, 0);
+                    }
+                    else
+                    {
+                        return configure_lhs_rhs_info(m, n, 4, 4, 8, 1, 32, 0, 1, 1, 0, 0);
+                    }
+                }
+                else
+                {
+                    if(r_mn <= 0.6261f)
+                    {
+                        return configure_lhs_rhs_info(m, n, 4, 4, 8, 1, 32, 0, 1, 1, 0, 0);
+                    }
+                    else
+                    {
+                        if(r_mk <= 3.4453f)
+                        {
+                            if(r_mn <= 1.4135f)
+                            {
+                                return configure_lhs_rhs_info(m, n, 2, 8, 8, 1, 16, 0, 1, 1, 0, 0);
+                            }
+                            else
+                            {
+                                return configure_lhs_rhs_info(m, n, 4, 4, 8, 1, 32, 0, 1, 1, 0, 0);
+                            }
+                        }
+                        else
+                        {
+                            return configure_lhs_rhs_info(m, n, 2, 8, 8, 1, 16, 0, 1, 1, 0, 0);
+                        }
+                    }
+                }
+            }
+            else
+            {
+                if(r_nk <= 0.0302f)
+                {
+                    return configure_lhs_rhs_info(m, n, 2, 4, 8, 1, 8, 0, 1, 1, 0, 1);
+                }
+                else
+                {
+                    if(r_mk <= 181.3750f)
+                    {
+                        return configure_lhs_rhs_info(m, n, 4, 4, 8, 1, 32, 0, 1, 1, 0, 0);
+                    }
+                    else
+                    {
+                        if(workload <= 28035.2002f)
+                        {
+                            return configure_lhs_rhs_info(m, n, 2, 8, 8, 1, 16, 0, 1, 1, 0, 0);
+                        }
+                        else
+                        {
+                            if(r_mk <= 808.6667f)
+                            {
+                                return configure_lhs_rhs_info(m, n, 4, 4, 8, 1, 32, 0, 1, 1, 0, 0);
+                            }
+                            else
+                            {
+                                return configure_lhs_rhs_info(m, n, 2, 8, 8, 1, 16, 0, 1, 1, 0, 0);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+} // namespace gemm
+} // namespace kernels
+} // namespace opencl
+} // namespace arm_compute