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Diffstat (limited to 'src/core/CL/cl_kernels/nchw/scale.cl')
-rw-r--r-- | src/core/CL/cl_kernels/nchw/scale.cl | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/nchw/scale.cl b/src/core/CL/cl_kernels/nchw/scale.cl new file mode 100644 index 0000000000..2b4d6be9fb --- /dev/null +++ b/src/core/CL/cl_kernels/nchw/scale.cl @@ -0,0 +1,271 @@ +/* + * 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. + */ +#include "helpers.h" +#include "tile_helpers.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_nearest(const float2 coord, const float2 scale) +{ +#ifdef SAMPLING_POLICY_TOP_LEFT + const float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0); + 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 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0); + const float4 new_x = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0); + const float4 new_y = (float4)((coord.s1 + 0.5f) * 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); +#else /* SAMPLING_POLICY */ +#error("Unsupported sampling policy"); +#endif /* SAMPLING_POLICY */ +} + +/** 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(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 NEAREAST NEIGHBOUR method. Input and output are single channel U8 or S16. + * + * @note Sampling policy to used is passed as -DSAMPLING_POLICY_(TYPE) e.g. -DSAMPLING_POLICY_TOP_LEFT + * + * @param[in] in_ptr Pointer to the source image. Supported data types: U8, S16. + * @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 + */ +__kernel void scale_nearest_neighbour_nchw( + IMAGE_DECLARATION(in), + IMAGE_DECLARATION(out)) +{ + const int x = get_global_id(0); + const int y = get_global_id(1); + + float8 transformed = transform_nearest((float2)(x * VEC_SIZE, y), (float2)(SCALE_X, SCALE_Y)); +#ifdef ALIGN_CORNERS + transformed = round(transformed); +#endif // ALIGN_CORNERS + + TILE(SELECT_DATA_TYPE(DATA_TYPE), 1, 4, cond); + cond[0].v = CONVERT(((transformed.even < 0) || (transformed.even >= (int)SRC_WIDTH)) || ((transformed.odd < 0) || (transformed.odd >= (int)SRC_HEIGHT)), SELECT_VEC_DATA_TYPE(DATA_TYPE, 4)); + + TILE(int, 1, 4, in_x); + TILE(int, 1, 4, in_y); + in_x[0].v = convert_int4(clamp(transformed.even, 0.f, SRC_WIDTH - 1.f)); + in_y[0].v = convert_int4(clamp(transformed.odd, 0.f, SRC_HEIGHT - 1.f)); + + TILE(DATA_TYPE, 1, VEC_SIZE, out_vals); + LOOP_UNROLLING(int, i, 0, 1, VEC_SIZE, + { + out_vals[0].s[i] = select(*((__global DATA_TYPE *)(in_ptr + in_offset_first_element_in_bytes + in_x[0].s[i] * sizeof(DATA_TYPE) + in_y[0].s[i] * in_stride_y)), (DATA_TYPE)CONSTANT_VALUE, cond[0].s[i]); + }) + + __global uchar *out_addr = out_ptr + out_offset_first_element_in_bytes + x * out_step_x + y * out_stride_y; + + if(x == get_global_size(0) - 1) + { +#if VEC_SIZE == 1 + VSTORE_PARTIAL(VEC_SIZE, VEC_SIZE_LEFTOVER) + (out_vals[0].s[0], 0, (__global DATA_TYPE *)out_addr); +#else // VEC_SIZE == 1 + VSTORE_PARTIAL(VEC_SIZE, VEC_SIZE_LEFTOVER) + (out_vals[0].v, 0, (__global DATA_TYPE *)out_addr); +#endif // VEC_SIZE == 1 + } + else + { +#if VEC_SIZE == 1 + VSTORE(VEC_SIZE) + (out_vals[0].s[0], 0, (__global DATA_TYPE *)out_addr); +#else // VEC_SIZE == 1 + VSTORE(VEC_SIZE) + (out_vals[0].v, 0, (__global DATA_TYPE *)out_addr); +#endif // VEC_SIZE == 1 + } +} + +/** 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 + * + * @param[in] in_ptr Pointer to the source image. Supported data types: U8, S16. + * @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 + */ +__kernel void scale_bilinear_nchw( + IMAGE_DECLARATION(in), + IMAGE_DECLARATION(out)) +{ + const int x = get_global_id(0); + const int y = get_global_id(1); + + TILE(float, 1, 8, trans_coords); + TILE(float, 1, 8, floor_coords); + TILE(int, 1, 16, in_x); + TILE(int, 1, 16, in_y); + + trans_coords[0].v = transform_bilinear((float2)(x * VEC_SIZE, y), (float2)(SCALE_X, SCALE_Y)); + floor_coords[0].v = floor(trans_coords[0].v); + + LOOP_UNROLLING(int, i, 0, 1, 4, + { + LOOP_UNROLLING(int, j, 0, 1, 4, + { + in_x[0].s[i * 4 + j] = floor_coords[0].s[i * 2 + 0] + (j % 2); + in_y[0].s[i * 4 + j] = floor_coords[0].s[i * 2 + 1] + (j > 1); + }) + }) + +#if defined(BORDER_MODE_CONSTANT) + TILE(SELECT_DATA_TYPE(DATA_TYPE), 1, 16, cond); + cond[0].v = CONVERT(((in_x[0].v < 0) || (in_x[0].v >= (int)SRC_WIDTH)) || ((in_y[0].v < 0) || (in_y[0].v >= (int)SRC_HEIGHT)), SELECT_VEC_DATA_TYPE(DATA_TYPE, 16)); +#endif // defined(BORDER_MODE_CONSTANT) + + in_x[0].v = clamp(in_x[0].v, 0, (int16)((int)SRC_WIDTH - 1)); + in_y[0].v = clamp(in_y[0].v, 0, (int16)((int)SRC_HEIGHT - 1)); + + TILE(DATA_TYPE, 1, 16, in_vals); + + // Loads the values from the input image +#if defined(BORDER_MODE_CONSTANT) + LOOP_UNROLLING(int, i, 0, 1, 16, + { + in_vals[0].s[i] = select(*((__global DATA_TYPE *)(in_ptr + in_offset_first_element_in_bytes + in_x[0].s[i] * sizeof(DATA_TYPE) + in_y[0].s[i] * (int)in_stride_y)), (DATA_TYPE)CONSTANT_VALUE, cond[0].s[i]); + }) +#else // defined(BORDER_MODE_CONSTANT) + LOOP_UNROLLING(int, i, 0, 1, 16, + { + in_vals[0].s[i] = *((__global DATA_TYPE *)(in_ptr + in_offset_first_element_in_bytes + in_x[0].s[i] * sizeof(DATA_TYPE) + in_y[0].s[i] * (int)in_stride_y)); + }) +#endif // defined(BORDER_MODE_CONSTANT) + + TILE(float, 1, 8, a); + TILE(float, 1, 8, b); + + a[0].v = trans_coords[0].v - floor_coords[0].v; + b[0].v = ((float8)(1.f)) - a[0].v; + +#if defined(OFFSET) && defined(SCALE) + TILE(float, 1, 16, in_vals_f32); + TILE(float, 1, 4, out_vals_f32); + + in_vals_f32[0].v = convert_float16(convert_int16(in_vals[0].v) - (int16)OFFSET) * (float16)SCALE; + + // Bilinear interpolation: (in0 * b0 * b1) + (in1 * a0 * b1) + (in2 * b0 * a1) + (in3 * a0 * a1) + // (in4 * b2 * b3) + (in5 * a2 * b3) + (in6 * b2 * a3) + (in7 * a2 * a3) + // (in8 * b4 * b5) + (in9 * a4 * b5) + (in10 * b4 * a5) + (in11 * a4 * a5) + // (in12 * b6 * b7) + (in13 * a6 * b7) + (in14 * b6 * a7) + (in15 * a6 * a7) + LOOP_UNROLLING(int, i, 0, 1, 4, + { + out_vals_f32[0].s[i] = (in_vals_f32[0].s[i * 4 + 0] * b[0].s[i * 2] * b[0].s[i * 2 + 1]) + (in_vals_f32[0].s[i * 4 + 1] * a[0].s[i * 2] * b[0].s[i * 2 + 1]) + (in_vals_f32[0].s[i * 4 + 2] * b[0].s[i * 2] * a[0].s[i * 2 + 1]) + (in_vals_f32[0].s[i * 4 + 3] * a[0].s[i * 2] * a[0].s[i * 2 + 1]); + }) + + TILE(DATA_TYPE, 1, 4, out_vals_4); + TILE(DATA_TYPE, 1, VEC_SIZE, out_vals); + + out_vals_4[0].v = CONVERT_SAT(convert_int4_sat_rtp(out_vals_f32[0].v / (float)SCALE) + OFFSET, VEC_DATA_TYPE(DATA_TYPE, 4)); + + LOOP_UNROLLING(int, i, 0, 1, VEC_SIZE, + { + out_vals[0].s[i] = out_vals_4[0].s[i]; + }) +#else // defined(OFFSET) && defined(SCALE) + + TILE(DATA_TYPE, 1, VEC_SIZE, out_vals); + + // Bilinear interpolation: (in0 * b0 * b1) + (in1 * a0 * b1) + (in2 * b0 * a1) + (in3 * a0 * a1) + // (in4 * b2 * b3) + (in5 * a2 * b3) + (in6 * b2 * a3) + (in7 * a2 * a3) + // (in8 * b4 * b5) + (in9 * a4 * b5) + (in10 * b4 * a5) + (in11 * a4 * a5) + // (in12 * b6 * b7) + (in13 * a6 * b7) + (in14 * b6 * a7) + (in15 * a6 * a7) + LOOP_UNROLLING(int, i, 0, 1, VEC_SIZE, + { + out_vals[0].s[i] = (in_vals[0].s[i * 4 + 0] * b[0].s[i * 2] * b[0].s[i * 2 + 1]) + (in_vals[0].s[i * 4 + 1] * a[0].s[i * 2] * b[0].s[i * 2 + 1]) + (in_vals[0].s[i * 4 + 2] * b[0].s[i * 2] * a[0].s[i * 2 + 1]) + (in_vals[0].s[i * 4 + 3] * a[0].s[i * 2] * a[0].s[i * 2 + 1]); + }) +#endif // defined(OFFSET) && defined(SCALE) + + __global uchar *out_addr = out_ptr + out_offset_first_element_in_bytes + x * out_step_x + y * out_stride_y; + + if(x == get_global_size(0) - 1) + { +#if VEC_SIZE == 1 + VSTORE_PARTIAL(VEC_SIZE, VEC_SIZE_LEFTOVER) + (out_vals[0].s[0], 0, (__global DATA_TYPE *)out_addr); +#else // VEC_SIZE == 1 + VSTORE_PARTIAL(VEC_SIZE, VEC_SIZE_LEFTOVER) + (out_vals[0].v, 0, (__global DATA_TYPE *)out_addr); +#endif // VEC_SIZE == 1 + } + else + { +#if VEC_SIZE == 1 + VSTORE(VEC_SIZE) + (out_vals[0].s[0], 0, (__global DATA_TYPE *)out_addr); +#else // VEC_SIZE == 1 + VSTORE(VEC_SIZE) + (out_vals[0].v, 0, (__global DATA_TYPE *)out_addr); +#endif // VEC_SIZE == 1 + } +}
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