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/*
* 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);
}
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