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diff --git a/src/cpu/kernels/CpuSubKernel.cpp b/src/cpu/kernels/CpuSubKernel.cpp
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+/*
+ * Copyright (c) 2021-2023 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/cpu/kernels/CpuSubKernel.h"
+
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/Validate.h"
+
+#include "src/core/common/Registrars.h"
+#include "src/core/CPP/Validate.h"
+#include "src/core/helpers/AutoConfiguration.h"
+#include "src/core/helpers/WindowHelpers.h"
+#include "src/cpu/kernels/add/generic/neon/impl.h"
+#include "src/cpu/kernels/sub/neon/impl.h"
+#include "src/cpu/kernels/sub/neon/list.h"
+
+#if defined(ENABLE_FP32_KERNELS)
+namespace
+{
+static constexpr size_t default_mws_N1_fp32_neon = 24385;
+static constexpr size_t default_mws_V1_fp32_neon = 40520;
+} // namespace
+#endif /* ENABLE_FP32_KERNELS */
+
+namespace arm_compute
+{
+namespace cpu
+{
+namespace kernels
+{
+namespace
+{
+using CpuSubKernelDataTypeISASelectorData = CpuAddKernelDataTypeISASelectorData;
+using CpuSubKernelDataTypeISASelectorDataPtr = CpuAddKernelDataTypeISASelectorDataPtr;
+
+static const std::vector<CpuSubKernel::SubKernel> available_kernels = {
+ {"neon_fp32_sub", [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::F32); },
+ REGISTER_FP32_NEON(arm_compute::cpu::sub_same_neon<float>)},
+ {"neon_fp16_sub",
+ [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::F16) && data.isa.fp16; },
+ REGISTER_FP16_NEON(arm_compute::cpu::sub_same_neon_fp16)},
+ {"neon_u8_sub", [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::U8); },
+ REGISTER_INTEGER_NEON(arm_compute::cpu::sub_same_neon<uint8_t>)},
+ {"neon_s16_sub", [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::S16); },
+ REGISTER_INTEGER_NEON(arm_compute::cpu::sub_same_neon<int16_t>)},
+ {"neon_s32_sub", [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::S32); },
+ REGISTER_INTEGER_NEON(arm_compute::cpu::sub_same_neon<int32_t>)},
+ {"neon_qu8_sub_fixedpoint",
+ [](const CpuSubKernelDataTypeISASelectorData &data)
+ { return ((data.dt == DataType::QASYMM8) && data.can_use_fixedpoint); },
+ REGISTER_QASYMM8_NEON(arm_compute::cpu::sub_qasymm8_neon_fixedpoint)},
+ {"neon_qs8_sub_fixedpoint",
+ [](const CpuSubKernelDataTypeISASelectorData &data)
+ { return ((data.dt == DataType::QASYMM8_SIGNED) && data.can_use_fixedpoint); },
+ REGISTER_QASYMM8_SIGNED_NEON(arm_compute::cpu::sub_qasymm8_signed_neon_fixedpoint)},
+ {"neon_qu8_sub", [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::QASYMM8); },
+ REGISTER_QASYMM8_NEON(arm_compute::cpu::sub_qasymm8_neon)},
+ {"neon_qs8_sub",
+ [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::QASYMM8_SIGNED); },
+ REGISTER_QASYMM8_SIGNED_NEON(arm_compute::cpu::sub_qasymm8_signed_neon)},
+ {"neon_qs16_sub", [](const CpuSubKernelDataTypeISASelectorData &data) { return (data.dt == DataType::QSYMM16); },
+ REGISTER_QSYMM16_NEON(arm_compute::cpu::sub_qsymm16_neon)},
+};
+
+inline Status
+validate_arguments(const ITensorInfo &src0, const ITensorInfo &src1, const ITensorInfo &dst, ConvertPolicy policy)
+{
+ ARM_COMPUTE_UNUSED(policy);
+ ARM_COMPUTE_RETURN_ERROR_ON_CPU_F16_UNSUPPORTED(&src0);
+ ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(&src0, 1, DataType::U8, DataType::QASYMM8,
+ DataType::QASYMM8_SIGNED, DataType::QSYMM16, DataType::S16,
+ DataType::S32, DataType::F16, DataType::F32);
+ ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(&src0, &src1);
+
+ const auto can_use_fixedpoint = sub_q8_neon_fixedpoint_possible(&src0, &src1, &dst);
+ const auto uk = CpuSubKernel::get_implementation<CpuSubKernelDataTypeISASelectorData>(
+ CpuSubKernelDataTypeISASelectorData{src0.data_type(), CPUInfo::get().get_isa(), can_use_fixedpoint});
+
+ ARM_COMPUTE_RETURN_ERROR_ON(uk == nullptr || uk->ukernel == nullptr);
+
+ const TensorShape out_shape = TensorShape::broadcast_shape(src0.tensor_shape(), src1.tensor_shape());
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(out_shape.total_size() == 0, "Inputs are not broadcast compatible");
+
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(is_data_type_quantized(src0.data_type()) && (policy == ConvertPolicy::WRAP),
+ "Convert policy cannot be WRAP if datatype is quantized");
+
+ // Validate in case of configured dst
+ if (dst.total_size() > 0)
+ {
+ ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(&src0, &dst);
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(detail::have_different_dimensions(out_shape, dst.tensor_shape(), 0),
+ "Wrong shape for dst");
+ }
+ return Status{};
+}
+} // namespace
+
+void CpuSubKernel::configure(const ITensorInfo *src0, const ITensorInfo *src1, ITensorInfo *dst, ConvertPolicy policy)
+{
+ ARM_COMPUTE_ERROR_ON_NULLPTR(src0, src1, dst);
+ ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(*src0, *src1, *dst, policy));
+
+ const TensorShape &out_shape = TensorShape::broadcast_shape(src0->tensor_shape(), src1->tensor_shape());
+
+ // Auto initialize dst if not initialized
+ set_shape_if_empty(*dst, out_shape);
+ set_data_type_if_unknown(*dst, src0->data_type());
+
+ const auto can_use_fixedpoint = sub_q8_neon_fixedpoint_possible(src0, src1, dst);
+ const auto uk = CpuSubKernel::get_implementation<CpuSubKernelDataTypeISASelectorData>(
+ CpuSubKernelDataTypeISASelectorData{src0->data_type(), CPUInfo::get().get_isa(), can_use_fixedpoint});
+
+ ARM_COMPUTE_ERROR_ON_NULLPTR(uk);
+
+ _policy = policy;
+ _run_method = uk->ukernel;
+ _name = std::string("CpuSubKernel").append("/").append(uk->name);
+
+ // CpuSubKernel doesn't need padding so update_window_and_padding() can be skipped
+ Window win;
+ std::tie(win, _split_dimension) = calculate_squashed_or_max_window(*src0, *src1);
+
+ ICpuKernel::configure(win);
+}
+
+size_t CpuSubKernel::get_mws(const CPUInfo &platform, size_t thread_count) const
+{
+ ARM_COMPUTE_UNUSED(thread_count);
+
+#if defined(ENABLE_FP32_KERNELS)
+ if (this->_run_method == &sub_same_neon<float>)
+ {
+ size_t mws = ICPPKernel::default_mws;
+ if (platform.get_cpu_model() == CPUModel::N1)
+ {
+ mws = default_mws_N1_fp32_neon;
+ }
+ else if (platform.get_cpu_model() == CPUModel::V1)
+ {
+ mws = default_mws_V1_fp32_neon;
+ }
+ else
+ {
+ return ICPPKernel::default_mws;
+ }
+
+ // tensor is 1D or was re-interpreted as 1D
+ if (this->window().shape().num_dimensions() == 1)
+ {
+ return mws;
+ }
+ else
+ {
+ // scale mws down by the number of elements along all the dimensions (x, z, w, etc) except the one
+ // that we parallelize along (the y dimension). This allows for parallelization when the Y_SIZE is small
+ // but the other sizes are large, which boosts performance.
+ mws = static_cast<size_t>(mws / (this->window().num_iterations_total() / this->window().num_iterations(1)));
+ return std::max(static_cast<size_t>(1), mws);
+ }
+ }
+#else /* ENABLE_FP32_KERNELS */
+ ARM_COMPUTE_UNUSED(platform);
+#endif /* ENABLE_FP32_KERNELS */
+ return ICPPKernel::default_mws;
+}
+
+Status
+CpuSubKernel::validate(const ITensorInfo *src0, const ITensorInfo *src1, const ITensorInfo *dst, ConvertPolicy policy)
+{
+ ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(src0, src1, dst);
+ ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(*src0, *src1, *dst, policy));
+
+ return Status{};
+}
+
+void CpuSubKernel::run_op(ITensorPack &tensors, const Window &window, const ThreadInfo &info)
+{
+ ARM_COMPUTE_UNUSED(info);
+ ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
+ ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICpuKernel::window(), window);
+ ARM_COMPUTE_ERROR_ON(_run_method == nullptr);
+
+ const ITensor *src0 = tensors.get_const_tensor(TensorType::ACL_SRC_0);
+ const ITensor *src1 = tensors.get_const_tensor(TensorType::ACL_SRC_1);
+ ITensor *dst = tensors.get_tensor(TensorType::ACL_DST);
+
+ _run_method(src0, src1, dst, _policy, window);
+}
+
+const char *CpuSubKernel::name() const
+{
+ return _name.c_str();
+}
+
+const std::vector<CpuSubKernel::SubKernel> &CpuSubKernel::get_available_kernels()
+{
+ return available_kernels;
+}
+
+} // namespace kernels
+} // namespace cpu
+} // namespace arm_compute