Port DepthConvert to new Api

- Renames DepthConvert to Cast
- Ports both NEDepthConverLayer and CLDepthConvert variants
- Removes legacy shift capability from DepthConvert, allowing only
shifts of 0

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I806a0f8eb23d23502b632c529fda7edde19c8176
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5565
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/src/core/cpu/kernels/CpuCastKernel.h b/src/core/cpu/kernels/CpuCastKernel.h
new file mode 100644
index 0000000000..2a75c5850e
--- /dev/null
+++ b/src/core/cpu/kernels/CpuCastKernel.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2016-2021 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 ARM_COMPUTE_CPU_CAST_KERNEL_H
+#define ARM_COMPUTE_CPU_CAST_KERNEL_H
+
+#include "src/core/common/Macros.h"
+#include "src/core/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
+{
+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
+     *   - BFLOAT16       -> F32
+     *   - F16            -> QASYMM8_SIGNED, QASYMM8, F32, S32, U8
+     *   - S32            -> QASYMM8_SIGNED, QASYMM8, F16, F32, U8
+     *   - F32            -> QASYMM8_SIGNED, QASYMM8, BFLOAT16, F16, S32, U8
+     *
+     * @param[in]  src    The src tensor to convert. Data types supported: QASYMM8_SIGNED/QASYMM8/U8/U16/S16/BFLOAT16/F16/F32.
+     * @param[out] dst    The dst tensor. Data types supported: QASYMM8_SIGNED/QASYMM8/U8/U16/S16/U32/S32/BFLOAT16/F16/F32.
+     * @param[in]  policy Conversion policy.
+     */
+    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;
+
+private:
+    ConvertPolicy _policy{ ConvertPolicy::SATURATE };
+};
+} // namespace kernels
+} // namespace cpu
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_CPU_CAST_KERNEL_H */