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Diffstat (limited to 'src/core/CL/cl_kernels/nchw/scale_quantized.cl')
| -rw-r--r-- | src/core/CL/cl_kernels/nchw/scale_quantized.cl | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/nchw/scale_quantized.cl b/src/core/CL/cl_kernels/nchw/scale_quantized.cl new file mode 100644 index 0000000000..946ad65c14 --- /dev/null +++ b/src/core/CL/cl_kernels/nchw/scale_quantized.cl @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2018-2021 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. + */ +#include "helpers_asymm.h" +#include "warp_helpers_quantized.h" + +/** Transforms four 2D coordinates. This is used to map the output coordinates to the input coordinates. + * + * @param[in] coord 2D coordinates to transform. + * @param[in] scale input/output scale ratio + * + * @return a float8 containing 4 2D transformed values in the input image. + */ +inline const float8 transform_bilinear_quantized(const float2 coord, const float2 scale) +{ + const float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0); +#ifdef SAMPLING_POLICY_TOP_LEFT + const float4 new_x = in_x_coords * (float4)(scale.s0); + const float4 new_y = (float4)(coord.s1 * scale.s1); + return (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3); +#elif SAMPLING_POLICY_CENTER + const float4 new_x = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0) - (float4)(0.5f); + const float4 new_y = (float4)((coord.s1 + 0.5f) * scale.s1 - 0.5f); + return (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3); +#else /* SAMPLING_POLICY */ +#error("Unsupported sampling policy"); +#endif /* SAMPLING_POLICY */ +} + +/** Performs an affine transformation on an image interpolating with the BILINEAR method. + * + * @note Sampling policy to used is passed as -DSAMPLING_POLICY_(TYPE) e.g. -DSAMPLING_POLICY_TOP_LEFT + * @note Scale value for QASYMM8 data type to used is passed as -DSCALE=<VALUE> e.g. -DSCALE=0.5 + * @note Offset value for QASYMM8 data type to used is passed as -DOFFSET=<VALUE> e.g. -DOFFSET=1 + * + * @param[in] in_ptr Pointer to the source image. Supported data types: QASYMM8. + * @param[in] in_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] in_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] in_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] in_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] in_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] out_ptr Pointer to the destination image. Supported data types: U8, S16. (Must be the same as the input) + * @param[in] out_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] out_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] out_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] out_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] input_width Input image width + * @param[in] input_height Input image height + * @param[in] scale_x The scale factor along x dimension + * @param[in] scale_y The scale factor along y dimension + */ +__kernel void scale_bilinear_quantized_nchw( + IMAGE_DECLARATION(in), + IMAGE_DECLARATION(out), + const float input_width, + const float input_height, + const float scale_x, + const float scale_y) +{ + Image in = CONVERT_TO_IMAGE_STRUCT_NO_STEP(in); + Image out = CONVERT_TO_IMAGE_STRUCT(out); + const float2 r = (float2)(scale_x, scale_y); + const float8 tc = transform_bilinear_quantized(get_current_coords_quantized(), r); + vstore4(bilinear_interpolate_with_border_quantized(&in, tc, input_width, input_height, BORDER_SIZE, SCALE, OFFSET), 0, (__global DATA_TYPE *)out.ptr); +}
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