Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, 2017 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #include "helpers.h" |
| 25 | |
| 26 | /** This function performs table lookup on U8 input/output images. |
| 27 | * |
| 28 | * Global Workgroup Size [ DIV_CEIL(width, 8), height ] |
| 29 | * |
| 30 | * |
| 31 | * @param[in] src_ptr Pointer to the source image. Supported data types: U8 |
| 32 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 33 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 34 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 35 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 36 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 37 | * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 |
| 38 | * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| 39 | * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| 40 | * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| 41 | * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| 42 | * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| 43 | * @param[in] lut LUT table. Supported data types: U8 |
| 44 | */ |
| 45 | __kernel void tablelookup_U8( |
| 46 | IMAGE_DECLARATION(src), |
| 47 | IMAGE_DECLARATION(dst), |
| 48 | __global uchar *lut) |
| 49 | { |
| 50 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 51 | Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| 52 | |
| 53 | /* Load input data */ |
| 54 | uchar8 data = vload8(0, src.ptr); |
| 55 | |
| 56 | /* Load lut data */ |
| 57 | uchar8 lut_data = (uchar8)(lut[data.s0], lut[data.s1], lut[data.s2], lut[data.s3], |
| 58 | lut[data.s4], lut[data.s5], lut[data.s6], lut[data.s7]); |
| 59 | |
| 60 | /* Store result */ |
| 61 | vstore8(lut_data, 0, dst.ptr); |
| 62 | } |
| 63 | |
| 64 | /** This function performs table lookup on S16 input/output images. |
| 65 | * |
| 66 | * Global Workgroup Size [ DIV_CEIL(width, 8), height ] |
| 67 | * |
| 68 | * @param[in] src_ptr Pointer to the source image. Supported data types: S16 |
| 69 | * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) |
| 70 | * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) |
| 71 | * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) |
| 72 | * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) |
| 73 | * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image |
| 74 | * @param[out] dst_ptr Pointer to the destination image. Supported data types: S16 |
| 75 | * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) |
| 76 | * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) |
| 77 | * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) |
| 78 | * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) |
| 79 | * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image |
| 80 | * @param[in] lut LUT table. Supported data types: S16 |
| 81 | * @param[in] offset LUT offset |
| 82 | * @param[in] count Number of elements in the LUT |
| 83 | */ |
| 84 | __kernel void tablelookup_S16( |
| 85 | IMAGE_DECLARATION(src), |
| 86 | IMAGE_DECLARATION(dst), |
| 87 | __global short *lut, |
| 88 | uint offset, |
| 89 | uint count) |
| 90 | { |
| 91 | Image src = CONVERT_TO_IMAGE_STRUCT(src); |
| 92 | Image dst = CONVERT_TO_IMAGE_STRUCT(dst); |
| 93 | |
| 94 | /* Load input data */ |
| 95 | short8 data = vload8(0, (__global short *)src.ptr); |
| 96 | |
| 97 | /* Load output data */ |
| 98 | int8 out_data = convert_int8(vload8(0, (__global short *)dst.ptr)); |
| 99 | |
| 100 | /* Calculate index */ |
| 101 | int8 index = convert_int8(data) + (int8)(offset); |
| 102 | int8 cond = (index >= 0 && index < (int8)count); |
| 103 | index = select(0, index, cond); |
| 104 | |
| 105 | /* Load lut data */ |
| 106 | int8 lut_data = (int8)(lut[index.s0], lut[index.s1], lut[index.s2], lut[index.s3], |
| 107 | lut[index.s4], lut[index.s5], lut[index.s6], lut[index.s7]); |
| 108 | |
| 109 | /* Select output data depending on condition */ |
| 110 | lut_data = select(out_data, lut_data, cond); |
| 111 | |
| 112 | /* Store result */ |
| 113 | vstore8(convert_short8(lut_data), 0, (__global short *)dst.ptr); |
| 114 | } |