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Diffstat (limited to 'src/core/CL/cl_kernels/tablelookup.cl')
-rw-r--r-- | src/core/CL/cl_kernels/tablelookup.cl | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/tablelookup.cl b/src/core/CL/cl_kernels/tablelookup.cl new file mode 100644 index 0000000000..cee116bd75 --- /dev/null +++ b/src/core/CL/cl_kernels/tablelookup.cl @@ -0,0 +1,114 @@ +/* + * Copyright (c) 2016, 2017 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 "helpers.h" + +/** This function performs table lookup on U8 input/output images. + * + * Global Workgroup Size [ DIV_CEIL(width, 8), height ] + * + * + * @param[in] src_ptr Pointer to the source image. Supported data types: U8 + * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 + * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] lut LUT table. Supported data types: U8 + */ +__kernel void tablelookup_U8( + IMAGE_DECLARATION(src), + IMAGE_DECLARATION(dst), + __global uchar *lut) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); + Image dst = CONVERT_TO_IMAGE_STRUCT(dst); + + /* Load input data */ + uchar8 data = vload8(0, src.ptr); + + /* Load lut data */ + uchar8 lut_data = (uchar8)(lut[data.s0], lut[data.s1], lut[data.s2], lut[data.s3], + lut[data.s4], lut[data.s5], lut[data.s6], lut[data.s7]); + + /* Store result */ + vstore8(lut_data, 0, dst.ptr); +} + +/** This function performs table lookup on S16 input/output images. + * + * Global Workgroup Size [ DIV_CEIL(width, 8), height ] + * + * @param[in] src_ptr Pointer to the source image. Supported data types: S16 + * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] lut LUT table. Supported data types: S16 + * @param[in] offset LUT offset + * @param[in] count Number of elements in the LUT + */ +__kernel void tablelookup_S16( + IMAGE_DECLARATION(src), + IMAGE_DECLARATION(dst), + __global short *lut, + uint offset, + uint count) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); + Image dst = CONVERT_TO_IMAGE_STRUCT(dst); + + /* Load input data */ + short8 data = vload8(0, (__global short *)src.ptr); + + /* Load output data */ + int8 out_data = convert_int8(vload8(0, (__global short *)dst.ptr)); + + /* Calculate index */ + int8 index = convert_int8(data) + (int8)(offset); + int8 cond = (index >= 0 && index < (int8)count); + index = select(0, index, cond); + + /* Load lut data */ + int8 lut_data = (int8)(lut[index.s0], lut[index.s1], lut[index.s2], lut[index.s3], + lut[index.s4], lut[index.s5], lut[index.s6], lut[index.s7]); + + /* Select output data depending on condition */ + lut_data = select(out_data, lut_data, cond); + + /* Store result */ + vstore8(convert_short8(lut_data), 0, (__global short *)dst.ptr); +} |