COMPMID-855 - Optimizing im2col on OpenCL (DCHW)
Introduced optimizations for 1x1, 3x3, 5x5 and 11x11
Change-Id: Ibb7f7a9fbec01a7684746ed8513634078126e452
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/118107
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
diff --git a/src/core/CL/cl_kernels/im2col.cl b/src/core/CL/cl_kernels/im2col.cl
new file mode 100644
index 0000000..75d99bd
--- /dev/null
+++ b/src/core/CL/cl_kernels/im2col.cl
@@ -0,0 +1,804 @@
+/*
+ * Copyright (c) 2018 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"
+
+#if defined(FIXED_POINT_POSITION)
+#include "fixed_point.h"
+#endif // FIXED_POINT_POSITION
+
+#if defined(DATA_TYPE) && defined(ELEMENT_SIZE)
+#if !defined(FIXED_POINT_POSITION)
+
+#if ELEMENT_SIZE == 1
+#define COND_DATA_TYPE char
+#elif ELEMENT_SIZE == 2
+#define COND_DATA_TYPE short
+#elif ELEMENT_SIZE == 4
+#define COND_DATA_TYPE int
+#else // ELEMENT_SIZE
+#error "Element size not support"
+#endif // ELEMENT_SIZE
+
+#if defined(CONVOLVED_WIDTH) && defined(STRIDE_Y) && defined(KERNEL_DEPTH)
+/** This kernel performs a reshaping of the input tensor to a tensor used to perform convolution using GEMM when the kernel size is 1x1 and the stride_x = 1
+ *
+ * @note This kernel computes 4 elements
+ * @note The data type must be passed at compile time using -DDATA_TYPE: e.g. -DDATA_TYPE=float
+ * @note The width of output tensor after matrix multiplication must be passed at compile time using -DCONVOLVED_WIDTH: e.g. -DCONVOLVED_WIDTH=34
+ * @note The kernel depth must be passed at compile time using -DKERNEL_DEPTH: e.g. -DKERNEL_DEPTH=3
+ * @note The stride along the Y direction must be passed at compile time using -DSTRIDE_Y: e.g. -DSTRIDE_Y=1
+ * @note In case biases will be added to the convolution -DHAS_BIAS has to be passed to append the final matrix with 1 in each row.
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: QS8/QASYMM8/QS16/F16/F32
+ * @param[in] src_stride_x Stride of the source tensor 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 tensor 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_stride_z Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[out] dst_ptr Pointer to the destination tensor. Supported data types: same as @p src_ptr
+ * @param[in] dst_stride_x Stride of the destination tensor 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 tensor 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 tensor
+ * @param[in] src_stride_w Stride of the source tensor in W dimension (in bytes).
+ * @param[in] dst_stride_w Stride of the destination tensor in W dimension (in bytes).
+ */
+__kernel void im2col1x1_stridex1_dchw(
+ TENSOR3D_DECLARATION(src),
+ IMAGE_DECLARATION(dst),
+ uint src_stride_w,
+ uint dst_stride_w)
+{
+ const uint xc = get_global_id(0) * 4; // x coordinate in the convolved tensor
+ const uint yc = get_global_id(1); // y coordinate in the convolved tensor
+ const uint ch = get_global_id(2) % KERNEL_DEPTH; // input feature map
+ const uint batch = get_global_id(2) / KERNEL_DEPTH; // batch size
+
+ // Clamp xc
+ // The strategy clamps at "xc" as it will be a valid value for sure
+ uint4 xc_clamped = xc + (uint4)(0, 1, 2, 3);
+
+ // Check which values are valid
+ const VEC_DATA_TYPE(COND_DATA_TYPE, 4) cond0 = CONVERT((xc_clamped < SRC_WIDTH), VEC_DATA_TYPE(COND_DATA_TYPE, 4));
+
+ xc_clamped = select((uint4)xc, xc_clamped, convert_int4(cond0));
+
+ // Calculate input indices
+ const uint xi = xc;
+ const uint yi = yc * STRIDE_Y;
+
+ // Calculate output indices
+ const uint xo = ch;
+ const uint4 yo = xc_clamped + yc * CONVOLVED_WIDTH; // Index of the convolution
+
+ // Get input and output address
+ __global uchar *input_ptr = src_ptr + src_offset_first_element_in_bytes + xi * src_stride_x + yi * src_stride_y + ch * src_stride_z + batch * src_stride_w;
+
+ __global uchar *output_ptr = dst_ptr + dst_offset_first_element_in_bytes + xo * dst_stride_x + batch * dst_stride_w;
+
+ VEC_DATA_TYPE(DATA_TYPE, 4)
+ data = vload4(0, (__global DATA_TYPE *)input_ptr);
+
+ // If out-of-bound, overwrite with the first element
+ data = select((VEC_DATA_TYPE(DATA_TYPE, 4))data.s0, data, cond0);
+
+ *(__global DATA_TYPE *)(output_ptr + yo.s0 * dst_stride_y) = data.s0;
+ *(__global DATA_TYPE *)(output_ptr + yo.s1 * dst_stride_y) = data.s1;
+ *(__global DATA_TYPE *)(output_ptr + yo.s2 * dst_stride_y) = data.s2;
+ *(__global DATA_TYPE *)(output_ptr + yo.s3 * dst_stride_y) = data.s3;
+
+#ifdef HAS_BIAS
+ if(ch == (KERNEL_DEPTH - 1))
+ {
+ *((__global DATA_TYPE *)(output_ptr + yo.s0 * dst_stride_y) + 1) = 1.0f;
+ *((__global DATA_TYPE *)(output_ptr + yo.s1 * dst_stride_y) + 1) = 1.0f;
+ *((__global DATA_TYPE *)(output_ptr + yo.s2 * dst_stride_y) + 1) = 1.0f;
+ *((__global DATA_TYPE *)(output_ptr + yo.s3 * dst_stride_y) + 1) = 1.0f;
+ }
+#endif // HAS_BIAS
+}
+#endif // defined(CONVOLVED_WIDTH) && defined(STRIDE_Y) && defined(KERNEL_DEPTH)
+
+#if defined(CONVOLVED_WIDTH) && defined(SRC_WIDTH) && defined(SRC_HEIGHT) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(KERNEL_DEPTH) && defined(PAD_LEFT) && defined(PAD_RIGHT) && defined(PAD_TOP) && defined(PAD_BOTTOM) && defined(PAD_VALUE)
+/** This kernel performs a reshaping of the input tensor to a tensor used to perform convolution using GEMM when the kernel size is 3x3
+ *
+ * @note The data type must be passed at compile time using -DDATA_TYPE: e.g. -DDATA_TYPE=float
+ * @note The width and height of the input tensor must be passed at compile time using -DSRC_WIDTH and -DSRC_HEIGHT: e.g. -DSRC_WIDTH=128 and -DSRC_HEIGHT=128
+ * @note The width of output tensor after matrix multiplication must be passed at compile time using -DCONVOLVED_WIDTH: e.g. -DCONVOLVED_WIDTH=34
+ * @note The kernel depth must be passed at compile time using -DKERNEL_DEPTH: e.g. -DKERNEL_DEPTH=3
+ * @note The pad_left, pad_right, pad_top and pad_bottom must be passed at compile time using -DPAD_LEFT, -DPAD_RIGHT, -DPAD_TOP and -DPAD_BOTTOM: e.g. -DPAD_LEFT=1, -DPAD_RIGHT=2, -DPAD_TOP=3 and -DPAD_BOTTOM=2
+ * @note The zero value to store in case we load values out-of-bounds must be passed at compile time using -DPAD_VALUE: e.g. -DPAD_VALUE=0.0
+ * @note The stride along the X and Y directions must be passed at compile time using -DSTRIDE_X and -DSTRIDE_Y: e.g. -DSTRIDE_X=1 and -DSTRIDE_Y=1
+ * @note In case biases will be added to the convolution -DHAS_BIAS has to be passed to append the final matrix with 1 in each row.
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: QS8/QASYMM8/QS16/F16/F32
+ * @param[in] src_stride_x Stride of the source tensor 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 tensor 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_stride_z Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[out] dst_ptr Pointer to the destination tensor. Supported data types: same as @p src_ptr
+ * @param[in] dst_stride_x Stride of the destination tensor 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 tensor 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 tensor
+ * @param[in] src_stride_w Stride of the source tensor in W dimension (in bytes).
+ * @param[in] dst_stride_w Stride of the destination tensor in W dimension (in bytes).
+ */
+__kernel void im2col3x3_dchw(
+ TENSOR3D_DECLARATION(src),
+ IMAGE_DECLARATION(dst),
+ uint src_stride_w,
+ uint dst_stride_w)
+{
+ const int xc = get_global_id(0); // x coordinate in the convolved tensor
+ const int yc = get_global_id(1); // y coordinate in the convolved tensor
+ const int ch = get_global_id(2) % KERNEL_DEPTH; // input feature map
+ const int batch = get_global_id(2) / KERNEL_DEPTH; // batch size
+
+ // Calculate input indices
+ const int xi = xc * STRIDE_X - PAD_LEFT;
+ const int yi = yc * STRIDE_Y - PAD_TOP;
+
+ // Calculate output indices
+ const int xo = ch * 9; // 3x3
+ const int yo = xc + yc * CONVOLVED_WIDTH; // Index of the convolution
+
+ // Get input and output address
+ __global uchar *input_ptr = src_ptr + src_offset_first_element_in_bytes + xi * (int)src_stride_x + yi * (int)src_stride_y + ch * src_stride_z + batch * src_stride_w;
+
+ __global uchar *output_ptr = dst_ptr + dst_offset_first_element_in_bytes + xo * dst_stride_x + yo * dst_stride_y + batch * dst_stride_w;
+
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row0 = vload3(0, (__global DATA_TYPE *)(input_ptr + 0 * src_stride_y));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row1 = vload3(0, (__global DATA_TYPE *)(input_ptr + 1 * src_stride_y));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row2 = vload3(0, (__global DATA_TYPE *)(input_ptr + 2 * src_stride_y));
+
+#if PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+ // Put 0 if the value is out-of-bound
+ int3 x = (int3)xi + (int3)(0, 1, 2);
+ int3 y = (int3)yi + (int3)(0, 1, 2);
+
+ VEC_DATA_TYPE(COND_DATA_TYPE, 3)
+ cond0 = CONVERT((x >= (int3)0 && x < (int3)SRC_WIDTH && (int3)(y.s0 >= 0 && y.s0 < SRC_HEIGHT)), VEC_DATA_TYPE(COND_DATA_TYPE, 3));
+ VEC_DATA_TYPE(COND_DATA_TYPE, 3)
+ cond1 = CONVERT((x >= (int3)0 && x < (int3)SRC_WIDTH && (int3)(y.s1 >= 0 && y.s1 < SRC_HEIGHT)), VEC_DATA_TYPE(COND_DATA_TYPE, 3));
+ VEC_DATA_TYPE(COND_DATA_TYPE, 3)
+ cond2 = CONVERT((x >= (int3)0 && x < (int3)SRC_WIDTH && (int3)(y.s2 >= 0 && y.s2 < SRC_HEIGHT)), VEC_DATA_TYPE(COND_DATA_TYPE, 3));
+
+ row0 = select((VEC_DATA_TYPE(DATA_TYPE, 3))PAD_VALUE, row0, cond0);
+ row1 = select((VEC_DATA_TYPE(DATA_TYPE, 3))PAD_VALUE, row1, cond1);
+ row2 = select((VEC_DATA_TYPE(DATA_TYPE, 3))PAD_VALUE, row2, cond2);
+#endif // PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row0.s012, row1.s012, row2.s01), 0, (__global DATA_TYPE *)output_ptr);
+ *((__global DATA_TYPE *)output_ptr + 8) = row2.s2;
+
+#ifdef HAS_BIAS
+ if(ch == (KERNEL_DEPTH - 1))
+ {
+ *((__global DATA_TYPE *)output_ptr + 9) = 1.0f;
+ }
+#endif // HAS_BIAS
+}
+
+/** This kernel performs a reshaping of the input tensor to a tensor used to perform convolution using GEMM when the kernel size is 5x5
+ *
+ * @note The data type must be passed at compile time using -DDATA_TYPE: e.g. -DDATA_TYPE=float
+ * @note The width and height of the input tensor must be passed at compile time using -DSRC_WIDTH and -DSRC_HEIGHT: e.g. -DSRC_WIDTH=128 and -DSRC_HEIGHT=128
+ * @note The width of output tensor after matrix multiplication must be passed at compile time using -DCONVOLVED_WIDTH: e.g. -DCONVOLVED_WIDTH=34
+ * @note The kernel depth must be passed at compile time using -DKERNEL_DEPTH: e.g. -DKERNEL_DEPTH=3
+ * @note The pad_left, pad_right, pad_top and pad_bottom must be passed at compile time using -DPAD_LEFT, -DPAD_RIGHT, -DPAD_TOP and -DPAD_BOTTOM: e.g. -DPAD_LEFT=1, -DPAD_RIGHT=2, -DPAD_TOP=3 and -DPAD_BOTTOM=2
+ * @note The zero value to store in case we load values out-of-bounds must be passed at compile time using -DPAD_VALUE: e.g. -DPAD_VALUE=0.0
+ * @note The stride along the X and Y directions must be passed at compile time using -DSTRIDE_X and -DSTRIDE_Y: e.g. -DSTRIDE_X=1 and -DSTRIDE_Y=1
+ * @note In case biases will be added to the convolution -DHAS_BIAS has to be passed to append the final matrix with 1 in each row.
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: QS8/QASYMM8/QS16/F16/F32
+ * @param[in] src_stride_x Stride of the source tensor 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 tensor 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_stride_z Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[out] dst_ptr Pointer to the destination tensor. Supported data types: same as @p src_ptr
+ * @param[in] dst_stride_x Stride of the destination tensor 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 tensor 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 tensor
+ * @param[in] src_stride_w Stride of the source tensor in W dimension (in bytes).
+ * @param[in] dst_stride_w Stride of the destination tensor in W dimension (in bytes).
+ */
+__kernel void im2col5x5_dchw(
+ TENSOR3D_DECLARATION(src),
+ IMAGE_DECLARATION(dst),
+ uint src_stride_w,
+ uint dst_stride_w)
+{
+ const int xc = get_global_id(0); // x coordinate in the convolved tensor
+ const int yc = get_global_id(1); // y coordinate in the convolved tensor
+ const int ch = get_global_id(2) % KERNEL_DEPTH; // input feature map
+ const int batch = get_global_id(2) / KERNEL_DEPTH; // batch size
+
+ // Calculate input indices
+ const int xi = xc * STRIDE_X - PAD_LEFT;
+ const int yi = yc * STRIDE_Y - PAD_TOP;
+
+ // Calculate output indices
+ const int xo = ch * 25; // 5x5
+ const int yo = xc + yc * CONVOLVED_WIDTH; // Index of the convolution
+
+#if PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+ // Put 0 if the value is out-of-bound
+ int4 x0 = (int4)xi + (int4)(0, 1, 2, 3);
+ int4 y0 = (int4)yi + (int4)(0, 1, 2, 3);
+ int x1 = xi + 4;
+ int y1 = yi + 4;
+
+ // Check if we could have out-of-bounds elements in the x direction
+ VEC_DATA_TYPE(COND_DATA_TYPE, 4)
+ x0_condition = CONVERT((x0 >= (int4)0 && x0 < (int4)SRC_WIDTH), VEC_DATA_TYPE(COND_DATA_TYPE, 4));
+ VEC_DATA_TYPE(COND_DATA_TYPE, 4)
+ y0_condition = CONVERT((y0 >= (int4)0 && y0 < (int4)SRC_HEIGHT), VEC_DATA_TYPE(COND_DATA_TYPE, 4));
+ COND_DATA_TYPE x1_condition = (COND_DATA_TYPE)(x1 >= 0 && x1 < SRC_WIDTH);
+ COND_DATA_TYPE y1_condition = (COND_DATA_TYPE)(y1 >= 0 && y1 < SRC_HEIGHT);
+#endif // PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+
+ // Get input and output address
+ __global uchar *input_ptr = src_ptr + src_offset_first_element_in_bytes + xi * (int)src_stride_x + yi * (int)src_stride_y + ch * src_stride_z + batch * src_stride_w;
+
+ __global uchar *output_ptr = dst_ptr + dst_offset_first_element_in_bytes + xo * dst_stride_x + yo * dst_stride_y + batch * dst_stride_w;
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 4)
+ row00 = vload4(0, (__global DATA_TYPE *)input_ptr);
+ DATA_TYPE
+ row01 = *((__global DATA_TYPE *)input_ptr + 4);
+
+ input_ptr += src_stride_y;
+
+ VEC_DATA_TYPE(DATA_TYPE, 4)
+ row10 = vload4(0, (__global DATA_TYPE *)input_ptr);
+ DATA_TYPE
+ row11 = *((__global DATA_TYPE *)input_ptr + 4);
+
+#if PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+ VEC_DATA_TYPE(COND_DATA_TYPE, 4)
+ cond00 = x0_condition && (VEC_DATA_TYPE(COND_DATA_TYPE, 4))y0_condition.s0;
+ VEC_DATA_TYPE(COND_DATA_TYPE, 4)
+ cond10 = x0_condition && (VEC_DATA_TYPE(COND_DATA_TYPE, 4))y0_condition.s1;
+ COND_DATA_TYPE cond01 = (COND_DATA_TYPE)(x1_condition && y0_condition.s0);
+ COND_DATA_TYPE cond11 = (COND_DATA_TYPE)(x1_condition && y0_condition.s1);
+
+ // Replace with 0 if the value is not valid
+ row00 = select((VEC_DATA_TYPE(DATA_TYPE, 4))PAD_VALUE, row00, cond00);
+ row10 = select((VEC_DATA_TYPE(DATA_TYPE, 4))PAD_VALUE, row10, cond10);
+ row01 = select((DATA_TYPE)PAD_VALUE, row01, cond01);
+ row11 = select((DATA_TYPE)PAD_VALUE, row11, cond11);
+#endif // PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s0123, row01,
+ row10.s012),
+ 0, (__global DATA_TYPE *)output_ptr);
+ vstore2((VEC_DATA_TYPE(DATA_TYPE, 2))(row10.s3, row11), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 10 * dst_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 4)
+ row00 = vload4(0, (__global DATA_TYPE *)input_ptr);
+ DATA_TYPE
+ row01 = *((__global DATA_TYPE *)input_ptr + 4);
+
+ input_ptr += src_stride_y;
+
+ VEC_DATA_TYPE(DATA_TYPE, 4)
+ row10 = vload4(0, (__global DATA_TYPE *)input_ptr);
+ DATA_TYPE
+ row11 = *((__global DATA_TYPE *)input_ptr + 4);
+
+#if PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+ VEC_DATA_TYPE(COND_DATA_TYPE, 4)
+ cond00 = x0_condition && (VEC_DATA_TYPE(COND_DATA_TYPE, 4))y0_condition.s2;
+ VEC_DATA_TYPE(COND_DATA_TYPE, 4)
+ cond10 = x0_condition && (VEC_DATA_TYPE(COND_DATA_TYPE, 4))y0_condition.s3;
+ COND_DATA_TYPE cond01 = (COND_DATA_TYPE)(x1_condition && y0_condition.s2);
+ COND_DATA_TYPE cond11 = (COND_DATA_TYPE)(x1_condition && y0_condition.s3);
+
+ // Replace with 0 if the value is not valid
+ row00 = select((VEC_DATA_TYPE(DATA_TYPE, 4))PAD_VALUE, row00, cond00);
+ row10 = select((VEC_DATA_TYPE(DATA_TYPE, 4))PAD_VALUE, row10, cond10);
+ row01 = select((DATA_TYPE)PAD_VALUE, row01, cond01);
+ row11 = select((DATA_TYPE)PAD_VALUE, row11, cond11);
+#endif // PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s0123, row01,
+ row10.s012),
+ 0, (__global DATA_TYPE *)output_ptr);
+ vstore2((VEC_DATA_TYPE(DATA_TYPE, 2))(row10.s3, row11), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 10 * dst_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 4)
+ row00 = vload4(0, (__global DATA_TYPE *)input_ptr);
+ DATA_TYPE
+ row01 = *((__global DATA_TYPE *)input_ptr + 4);
+
+ input_ptr += src_stride_y;
+
+#if PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+ VEC_DATA_TYPE(COND_DATA_TYPE, 4)
+ cond00 = x0_condition && (VEC_DATA_TYPE(COND_DATA_TYPE, 4))y1_condition;
+ COND_DATA_TYPE cond01 = (COND_DATA_TYPE)(x1_condition && y1_condition);
+
+ // Replace with 0 if the value is not valid
+ row00 = select((VEC_DATA_TYPE(DATA_TYPE, 4))PAD_VALUE, row00, cond00);
+ row01 = select((DATA_TYPE)PAD_VALUE, row01, cond01);
+#endif // PAD_LEFT != 0 || PAD_TOP != 0 || PAD_RIGHT != 0 || PAD_BOTTOM != 0
+
+ vstore4(row00, 0, (__global DATA_TYPE *)output_ptr);
+ *((__global DATA_TYPE *)output_ptr + 4) = row01;
+
+ output_ptr += 5 * dst_stride_x;
+ }
+
+#ifdef HAS_BIAS
+ if(ch == (KERNEL_DEPTH - 1))
+ {
+ *((__global DATA_TYPE *)output_ptr) = 1.0f;
+ }
+#endif // HAS_BIAS
+}
+#endif // defined(CONVOLVED_WIDTH) && defined(SRC_WIDTH) && defined(SRC_HEIGHT) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(KERNEL_DEPTH) && defined(PAD_LEFT) && defined(PAD_RIGHT) && defined(PAD_TOP) && defined(PAD_BOTTOM) && defined(PAD_VALUE)
+
+#if defined(CONVOLVED_WIDTH) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(KERNEL_DEPTH)
+/** This kernel performs a reshaping of the input tensor to a tensor used to perform convolution using GEMM when the kernel size is 11x11
+ *
+ * @note The data type must be passed at compile time using -DDATA_TYPE: e.g. -DDATA_TYPE=float
+ * @note The width of output tensor after matrix multiplication must be passed at compile time using -DCONVOLVED_WIDTH: e.g. -DCONVOLVED_WIDTH=34
+ * @note The kernel depth must be passed at compile time using -DKERNEL_DEPTH: e.g. -DKERNEL_DEPTH=3
+ * @note The stride along the X and Y directions must be passed at compile time using -DSTRIDE_X and -DSTRIDE_Y: e.g. -DSTRIDE_X=1 and -DSTRIDE_Y=1
+ * @note In case biases will be added to the convolution -DHAS_BIAS has to be passed to append the final matrix with 1 in each row.
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: QS8/QASYMM8/QS16/F16/F32
+ * @param[in] src_stride_x Stride of the source tensor 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 tensor 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_stride_z Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[out] dst_ptr Pointer to the destination tensor. Supported data types: same as @p src_ptr
+ * @param[in] dst_stride_x Stride of the destination tensor 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 tensor 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 tensor
+ * @param[in] src_stride_w Stride of the source tensor in W dimension (in bytes).
+ * @param[in] dst_stride_w Stride of the destination tensor in W dimension (in bytes).
+ */
+__kernel void im2col11x11_padx0_pady0_dchw(
+ TENSOR3D_DECLARATION(src),
+ IMAGE_DECLARATION(dst),
+ uint src_stride_w,
+ uint dst_stride_w)
+{
+ const int xc = get_global_id(0); // x coordinate in the convolved tensor
+ const int yc = get_global_id(1); // y coordinate in the convolved tensor
+ const int ch = get_global_id(2) % KERNEL_DEPTH; // input feature map
+ const int batch = get_global_id(2) / KERNEL_DEPTH; // batch size
+
+ // Calculate input indices
+ const int xi = xc * STRIDE_X;
+ const int yi = yc * STRIDE_Y;
+
+ // Calculate output indices
+ const int xo = ch * 121; // 11x11
+ const int yo = xc + yc * CONVOLVED_WIDTH; // Index of the convolution
+
+ // Get input and output address
+ __global uchar *input_ptr = src_ptr + src_offset_first_element_in_bytes + xi * src_stride_x + yi * src_stride_y + ch * src_stride_z + batch * src_stride_w;
+
+ __global uchar *output_ptr = dst_ptr + dst_offset_first_element_in_bytes + xo * dst_stride_x + yo * dst_stride_y + batch * dst_stride_w;
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ input_ptr += src_stride_y;
+ output_ptr += 11 * src_stride_x;
+ }
+
+ {
+ VEC_DATA_TYPE(DATA_TYPE, 8)
+ row00 = vload8(0, (__global DATA_TYPE *)(input_ptr));
+ VEC_DATA_TYPE(DATA_TYPE, 3)
+ row01 = vload3(0, (__global DATA_TYPE *)(input_ptr) + 8);
+
+ vstore8((VEC_DATA_TYPE(DATA_TYPE, 8))(row00.s01234567), 0, (__global DATA_TYPE *)output_ptr);
+ vstore3((VEC_DATA_TYPE(DATA_TYPE, 3))(row01.s012), 0, (__global DATA_TYPE *)output_ptr + 8);
+
+ output_ptr += 11 * src_stride_x;
+ }
+
+#ifdef HAS_BIAS
+ if(ch == (KERNEL_DEPTH - 1))
+ {
+ *((__global DATA_TYPE *)output_ptr) = 1.0f;
+ }
+#endif // HAS_BIAS
+}
+#endif // defined(CONVOLVED_WIDTH) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(KERNEL_DEPTH)
+#endif // !defined(FIXED_POINT_POSITION)
+
+#if defined(CONVOLVED_WIDTH) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(KERNEL_WIDTH) && defined(KERNEL_HEIGHT) && defined(KERNEL_DEPTH) && defined(SRC_WIDTH) && defined(SRC_HEIGHT) && defined(VECTOR_SIZE) && defined(WIDTH_MOD_VECTOR_SIZE)
+/** This kernel reshapes the input tensor to a tensor used to perform convolution using GEMM when
+ * the kernel width is greater than 1 (except when the kernel size is 3x3) and pad_x == pad_y == 0.
+ *
+ * @note The data type must be passed at compile time using -DDATA_TYPE e.g. -DDATA_TYPE=float.
+ * @note The vector size must be passed at compile time using -DVECTOR_SIZE e.g. -DVECTOR_SIZE=4.
+ * @note The width modulo vector size must be passed at compile time using -DWIDTH_MOD_VECTOR_SIZE e.g. -DWIDTH_MOD_VECTOR_SIZE=3.
+ * @note In case biases will be added to the convolution -DHAS_BIAS has to be passed to append the final matrix with 1 in each row.
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: QS8/QS16/F16/F32
+ * @param[in] src_stride_x Stride of the source tensor 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 tensor 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_stride_z Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[out] dst_ptr Pointer to the destination tensor. Supported data types: same as @p src_ptr
+ * @param[in] dst_stride_x Stride of the destination tensor 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 tensor 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 tensor
+ * @param[in] src_stride_w Stride of the source tensor in W dimension (in bytes).
+ * @param[in] dst_stride_w Stride of the destination tensor in W dimension (in bytes).
+ */
+__kernel void im2col_generic_padx0_pady0_dchw(
+ TENSOR3D_DECLARATION(src),
+ IMAGE_DECLARATION(dst),
+ uint src_stride_w,
+ uint dst_stride_w)
+{
+ const int xc = get_global_id(0); // x coordinate in the convolved tensor
+ const int yc = get_global_id(1); // y coordinate in the convolved tensor
+ const int ch = get_global_id(2) % KERNEL_DEPTH; // input feature map
+ const int batch = get_global_id(2) / KERNEL_DEPTH; // batch size
+
+ // Calculate input indices
+ const int xi = xc * STRIDE_X;
+ const int yi = yc * STRIDE_Y;
+ // Calculate output indices
+ const int xo = ch * KERNEL_WIDTH * KERNEL_HEIGHT;
+ const int yo = xc + yc * CONVOLVED_WIDTH; // Index of the convolution
+ __global uchar *input_ptr = src_ptr + src_offset_first_element_in_bytes + ch * src_stride_z + batch * src_stride_w;
+ __global DATA_TYPE *output_ptr = ((__global DATA_TYPE *)(dst_ptr + dst_offset_first_element_in_bytes + yo * dst_stride_y + batch * dst_stride_w)) + xo;
+ // Linearize convolution elements
+ for(int y = yi, y_e = yi + KERNEL_HEIGHT; y < y_e; ++y)
+ {
+ int last_x = 0;
+ for(int x = xi, x_e = xi + KERNEL_WIDTH; x + VECTOR_SIZE <= x_e; x += VECTOR_SIZE, output_ptr += VECTOR_SIZE)
+ {
+ VEC_DATA_TYPE(DATA_TYPE, VECTOR_SIZE)
+ row = VLOAD(VECTOR_SIZE)(0, (__global DATA_TYPE *)(input_ptr + x * src_stride_x + y * src_stride_y));
+ VSTORE(VECTOR_SIZE)
+ (row, 0, output_ptr);
+ last_x = x;
+ }
+ // Copy the remainder of the row by doing VLOAD(WIDTH_MOD_VECTOR_SIZE) and VSTORE(WIDTH_MOD_VECTOR_SIZE).
+ // Note that x and output_ptr have already been incremented by VECTOR_SIZE by the loop just before exit.
+#if WIDTH_MOD_VECTOR_SIZE == 1
+ *output_ptr = *((__global DATA_TYPE *)(input_ptr + (last_x + VECTOR_SIZE) * src_stride_x + y * src_stride_y));
+#elif WIDTH_MOD_VECTOR_SIZE > 1
+ VEC_DATA_TYPE(DATA_TYPE, WIDTH_MOD_VECTOR_SIZE)
+ row = VLOAD(WIDTH_MOD_VECTOR_SIZE)(0, (__global DATA_TYPE *)(input_ptr + (last_x + VECTOR_SIZE) * src_stride_x + y * src_stride_y));
+ VSTORE(WIDTH_MOD_VECTOR_SIZE)
+ (row, 0, output_ptr);
+#endif /* WIDTH_MOD_VECTOR_SIZE */
+ output_ptr += WIDTH_MOD_VECTOR_SIZE;
+ } /* End of loop over KERNEL_HEIGHT */
+
+#ifdef HAS_BIAS
+ if(ch == (KERNEL_DEPTH - 1))
+ {
+#ifdef FIXED_POINT_POSITION
+ *output_ptr = (DATA_TYPE)(1 << FIXED_POINT_POSITION);
+#else // FIXED_POINT_POSITION
+ *output_ptr = 1.0f;
+#endif // FIXED_POINT_POSITION
+ }
+#endif // HAS_BIAS
+}
+#endif //defined(CONVOLVED_WIDTH) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(PAD_LEFT) && defined(PAD_TOP) && defined(PAD_RIGHT) && defined(PAD_BOTTOM) && defined(KERNEL_WIDTH) && defined(KERNEL_HEIGHT) && defined(KERNEL_DEPTH) && defined(SRC_WIDTH) && defined(SRC_HEIGHT) && defined(VECTOR_SIZE) && defined(WIDTH_MOD_VECTOR_SIZE)
+
+#if defined(CONVOLVED_WIDTH) && defined(SRC_WIDTH) && defined(SRC_HEIGHT) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(KERNEL_WIDTH) && defined(KERNEL_HEIGHT) && defined(KERNEL_DEPTH) && defined(PAD_LEFT) && defined(PAD_RIGHT) && defined(PAD_TOP) && defined(PAD_BOTTOM) && defined(PAD_VALUE)
+/** This kernel performs a reshaping of the input tensor to a tensor used to perform convolution using GEMM.
+ *
+ * @note The data type must be passed at compile time using -DDATA_TYPE: e.g. -DDATA_TYPE=float
+ * @note The width and height of the input tensor must be passed at compile time using -DSRC_WIDTH and -DSRC_HEIGHT: e.g. -DSRC_WIDTH=128 and -DSRC_HEIGHT=128
+ * @note The width of output tensor after matrix multiplication must be passed at compile time using -DCONVOLVED_WIDTH: e.g. -DCONVOLVED_WIDTH=34
+ * @note The kernel width, height and depth must be passed at compile time using -DKERNEL_WIDTH, -DKERNEL_HEIGHT and -DKERNEL_DEPTH: e.g. -DKERNEL_WIDTH=3, -DKERNEL_HEIGHT=3 and -DKERNEL_DEPTH=64
+ * @note The pad_left, pad_right, pad_top and pad_bottom must be passed at compile time using -DPAD_LEFT, -DPAD_RIGHT, -DPAD_TOP and -DPAD_BOTTOM: e.g. -DPAD_LEFT=1, -DPAD_RIGHT=2, -DPAD_TOP=3 and -DPAD_BOTTOM=2
+ * @note The zero value to store in case we load values out-of-bounds must be passed at compile time using -DPAD_VALUE: e.g. -DPAD_VALUE=0.0
+ * @note The stride along the X and Y directions must be passed at compile time using -DSTRIDE_X and -DSTRIDE_Y: e.g. -DSTRIDE_X=1 and -DSTRIDE_Y=1
+ * @note In case biases will be added to the convolution -DHAS_BIAS has to be passed to append the final matrix with 1 in each row.
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: QS8/QASYMM8/QS16/F16/F32
+ * @param[in] src_stride_x Stride of the source tensor 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 tensor 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_stride_z Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[out] dst_ptr Pointer to the destination tensor. Supported data types: same as @p src_ptr
+ * @param[in] dst_stride_x Stride of the destination tensor 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 tensor 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 tensor
+ * @param[in] src_stride_w Stride of the source tensor in W dimension (in bytes).
+ * @param[in] dst_stride_w Stride of the destination tensor in W dimension (in bytes).
+ */
+__kernel void im2col_generic_dchw(
+ TENSOR3D_DECLARATION(src),
+ IMAGE_DECLARATION(dst),
+ uint src_stride_w,
+ uint dst_stride_w)
+{
+ const int xc = get_global_id(0); // x coordinate in the convolved tensor
+ const int yc = get_global_id(1); // y coordinate in the convolved tensor
+ const int ch = get_global_id(2) % KERNEL_DEPTH; // input feature map
+ const int batch = get_global_id(2) / KERNEL_DEPTH; // batch size
+
+ // Calculate input indices
+ const int xi = xc * STRIDE_X - PAD_LEFT;
+ const int yi = yc * STRIDE_Y - PAD_TOP;
+
+ // Calculate output indices
+ const int xo = ch * KERNEL_WIDTH * KERNEL_HEIGHT;
+ const int yo = xc + yc * CONVOLVED_WIDTH; // Index of the convolution
+
+ __global uchar *input_ptr = src_ptr + src_offset_first_element_in_bytes + ch * src_stride_z + batch * src_stride_w;
+ __global DATA_TYPE *output_ptr = ((__global DATA_TYPE *)(dst_ptr + dst_offset_first_element_in_bytes + yo * dst_stride_y + batch * dst_stride_w)) + xo;
+
+ // Linearize convolution elements
+ for(int y = yi, y_e = yi + KERNEL_HEIGHT; y < y_e; ++y)
+ {
+ for(int x = xi, x_e = xi + KERNEL_WIDTH; x < x_e; ++x, ++output_ptr)
+ {
+#if PAD_LEFT == 0 && PAD_TOP == 0 && PAD_RIGHT == 0 && PAD_BOTTOM == 0
+ *output_ptr = *((__global DATA_TYPE *)(input_ptr + x * src_stride_x + y * src_stride_y));
+#else // PAD_LEFT == 0 && PAD_TOP == 0 && PAD_RIGHT == 0 && PAD_BOTTOM == 0
+ if(x < 0 || x >= SRC_WIDTH || y < 0 || y >= SRC_HEIGHT)
+ {
+ *output_ptr = PAD_VALUE;
+ }
+ else
+ {
+ *output_ptr = *((__global DATA_TYPE *)(input_ptr + x * src_stride_x + y * src_stride_y));
+ }
+#endif // PAD_LEFT == 0 && PAD_TOP == 0 && PAD_RIGHT == 0 && PAD_BOTTOM == 0
+ }
+ }
+
+#ifdef HAS_BIAS
+ if(ch == (KERNEL_DEPTH - 1))
+ {
+#ifdef FIXED_POINT_POSITION
+ *output_ptr = (DATA_TYPE)(1 << FIXED_POINT_POSITION);
+#else // FIXED_POINT_POSITION
+ *output_ptr = 1.0f;
+#endif // FIXED_POINT_POSITION
+ }
+#endif // HAS_BIAS
+}
+#endif // defined(CONVOLVED_WIDTH) && defined(SRC_WIDTH) && defined(SRC_HEIGHT) && defined(STRIDE_X) && defined(STRIDE_Y) && defined(KERNEL_WIDTH) && defined(KERNEL_HEIGHT) && defined(KERNEL_DEPTH) && defined(PAD_LEFT) && defined(PAD_RIGHT) && defined(PAD_TOP) && defined(PAD_BOTTOM) && defined(PAD_VALUE)
+
+/**This kernel reshapes the input tensor to a tensor used to perform convolution using GEMM when
+ * the kernel width and height are the same of width and height of the input tensor
+ *
+ * @note Datatype should be given as a preprocessor argument using -DDATA_TYPE=type. e.g. -DDATA_TYPE=float
+ * @note In case biases will be added in late stage, -DHAS_BIAS has to be passed to append the final matrix with 1 in each row.
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: QS8/QASYMM8/QS16/F16/F32
+ * @param[in] src_stride_x Stride of the source tensor 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 tensor 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_stride_z Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] src_step_z src_stride_z * 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 tensor
+ * @param[out] dst_ptr Pointer to the destination tensor. Same as @p src_ptr
+ * @param[in] dst_stride_x Stride of the destination tensor 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_offset_first_element_in_bytes The offset of the first element in the destination tensor
+ * @param[in] width The width of the input tensor
+ * @param[in] height The height of the input tensor
+ */
+__kernel void im2col_reduced_dchw(
+ TENSOR3D_DECLARATION(src),
+ VECTOR_DECLARATION(dst),
+ uint width, uint height)
+{
+ Tensor3D src = CONVERT_TO_TENSOR3D_STRUCT(src);
+
+ const uint image_size = width * height;
+
+ __global uchar *tmp_out_ptr = dst_ptr + dst_offset_first_element_in_bytes + (get_global_id(0) + get_global_id(1) * width + get_global_id(2) * image_size) * dst_stride_x;
+
+ *((__global DATA_TYPE *)tmp_out_ptr) = *((__global DATA_TYPE *)src.ptr);
+
+#ifdef HAS_BIAS
+ // If it is the last thread in the 3 dimensional workgroup
+ if(get_global_id(0) == (get_global_size(0) - 1) && get_global_id(1) == (get_global_size(1) - 1) && get_global_id(2) == (get_global_size(2) - 1))
+ {
+ tmp_out_ptr += dst_stride_x;
+#ifdef FIXED_POINT_POSITION
+ *((__global DATA_TYPE *)tmp_out_ptr) = (DATA_TYPE)(1 << FIXED_POINT_POSITION);
+#else // FIXED_POINT_POSITION
+ *((__global DATA_TYPE *)tmp_out_ptr) = (DATA_TYPE)1.0f;
+#endif // FIXED_POINT_POSITION
+ }
+#endif // HAS_BIAS
+}
+#endif // defined(DATA_TYPE) && defined(ELEMENT_SIZE)
\ No newline at end of file