1 files changed, 98 insertions, 0 deletions
diff --git a/src/cpu/kernels/CpuCastKernel.h b/src/cpu/kernels/CpuCastKernel.h
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+++ b/src/cpu/kernels/CpuCastKernel.h
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+/*
+ * Copyright (c) 2016-2023 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.
+ */
+#ifndef ACL_SRC_CPU_KERNELS_CPUCASTKERNEL_H
+#define ACL_SRC_CPU_KERNELS_CPUCASTKERNEL_H
+
+#include "src/core/common/Macros.h"
+#include "src/cpu/ICpuKernel.h"
+
+namespace arm_compute
+{
+namespace cpu
+{
+namespace kernels
+{
+/** Casts a given tensor to a new type
+ *
+ * @note When casting between quantized types the scale and zeroPoint are ignored
+ */
+class CpuCastKernel : public ICpuKernel<CpuCastKernel>
+{
+private:
+    using CastKernelPtr =
+        std::add_pointer<void(const ITensor *, ITensor *, const ThreadInfo &, ConvertPolicy, const Window &)>::type;
+
+public:
+    CpuCastKernel() = default;
+    ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(CpuCastKernel);
+    /** Set the src and dst of the kernel
+     *
+     * Valid conversions src -> dst :
+     *
+     *   - QASYMM8_SIGNED -> S16, S32, F32, F16
+     *   - QASYMM8        -> U16, S16, S32, F32, F16
+     *   - U8             -> U16, S16, S32, F32, F16
+     *   - U16            -> U8, U32
+     *   - S16            -> QASYMM8_SIGNED, U8, S32
+     *   - F16            -> QASYMM8_SIGNED, QASYMM8, F32, S32, U8
+     *   - S32            -> QASYMM8_SIGNED, QASYMM8, F16, F32, U8
+     *   - S64            -> F32
+     *   - F32            -> QASYMM8_SIGNED, QASYMM8, F16, S32, U8
+     *
+     * @param[in]  src    The src tensor to convert. Data types supported: QASYMM8_SIGNED/QASYMM8/U8/U16/S16/S32/S64/F16/F32.
+     * @param[out] dst    The dst tensor. Data types supported: QASYMM8_SIGNED/QASYMM8/U8/U16/S16/U32/S32/S64/F16/F32.
+     * @param[in]  policy Conversion policy.
+     *
+     * @note S64 is only supported in aarch64
+     *
+     */
+    void configure(const ITensorInfo *src, ITensorInfo *dst, ConvertPolicy policy);
+    /** Static function to check if given info will lead to a valid configuration
+     *
+     * Similar to @ref CpuCastKernel::configure()
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *src, const ITensorInfo *dst, ConvertPolicy policy);
+
+    // Inherited methods overridden:
+    void        run_op(ITensorPack &tensors, const Window &window, const ThreadInfo &info) override;
+    const char *name() const override;
+
+    struct CastKernel
+    {
+        const char                          *name;
+        const CastDataTypeISASelectorDataPtr is_selected;
+        CastKernelPtr                        ukernel;
+    };
+
+    static const std::vector<CastKernel> &get_available_kernels();
+
+private:
+    ConvertPolicy _policy{ConvertPolicy::SATURATE};
+};
+} // namespace kernels
+} // namespace cpu
+} // namespace arm_compute
+#endif // ACL_SRC_CPU_KERNELS_CPUCASTKERNEL_H