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+
+// =================================================================================================
+// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
+// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
+// width of 100 characters per line.
+//
+// Author(s):
+// Cedric Nugteren <www.cedricnugteren.nl>
+//
+// This file contains the common kernels shared among different BLAS functions. This file contains
+// kernels to copy and pad matrices in various ways, including:
+// 1) copying into a larger matrix by adding padding
+// 2) copying into a smaller matrix by optionally removing padding. This is the general version
+// without restrictions, see the 'copy.opencl' file for a faster but more restricted copy kernel.
+//
+// =================================================================================================
+
+// Enables loading of this file using the C++ pre-processor's #include (C++11 standard raw string
+// literal). Comment-out this line for syntax-highlighting when developing.
+R"(
+
+// =================================================================================================
+
+// Copies a matrix from source to destination. The output is padded with zero values in case the
+// destination matrix dimensions are larger than the source matrix dimensions. Additionally, the ld
+// value and offset can be different.
+__attribute__((reqd_work_group_size(PAD_DIMX, PAD_DIMY, 1)))
+__kernel void CopyPadMatrix(const int src_one, const int src_two,
+ const int src_ld, const int src_offset,
+ __global const real* restrict src,
+ const int dest_one, const int dest_two,
+ const int dest_ld, const int dest_offset,
+ __global real* dest,
+ const int do_conjugate) {
+
+ // Loops over the work per thread in both dimensions
+ #pragma unroll
+ for (int w_one=0; w_one<PAD_WPTX; ++w_one) {
+ const int id_one = (get_group_id(0)*PAD_WPTX + w_one) * PAD_DIMX + get_local_id(0);
+ #pragma unroll
+ for (int w_two=0; w_two<PAD_WPTY; ++w_two) {
+ const int id_two = (get_group_id(1)*PAD_WPTY + w_two) * PAD_DIMY + get_local_id(1);
+ if (id_two < dest_two && id_one < dest_one) {
+
+ // Loads data if the thread IDs are within bounds of the source matrix. Otherwise, set the
+ // value to be written to zero.
+ real value;
+ SetToZero(value);
+ if (id_two < src_two && id_one < src_one) {
+ value = src[id_two*src_ld + id_one + src_offset];
+ }
+
+ // Stores the value in the destination matrix
+ if (do_conjugate == 1) { COMPLEX_CONJUGATE(value); }
+ dest[id_two*dest_ld + id_one + dest_offset] = value;
+ }
+ }
+ }
+}
+
+// =================================================================================================
+
+// Same as above, but now un-pads a matrix. This kernel reads data from a padded source matrix, but
+// writes only the actual data back to the destination matrix. Again, the ld value and offset can
+// be different.
+__attribute__((reqd_work_group_size(PAD_DIMX, PAD_DIMY, 1)))
+__kernel void CopyMatrix(const int src_one, const int src_two,
+ const int src_ld, const int src_offset,
+ __global const real* restrict src,
+ const int dest_one, const int dest_two,
+ const int dest_ld, const int dest_offset,
+ __global real* dest,
+ const int upper, const int lower,
+ const int diagonal_imag_zero) {
+
+ // Loops over the work per thread in both dimensions
+ #pragma unroll
+ for (int w_one=0; w_one<PAD_WPTX; ++w_one) {
+ const int id_one = (get_group_id(0)*PAD_WPTX + w_one) * PAD_DIMX + get_local_id(0);
+ #pragma unroll
+ for (int w_two=0; w_two<PAD_WPTY; ++w_two) {
+ const int id_two = (get_group_id(1)*PAD_WPTY + w_two) * PAD_DIMY + get_local_id(1);
+
+ // Masking in case of triangular matrices: updates only the upper or lower part
+ bool condition = true;
+ #if defined(ROUTINE_SYRK) || defined(ROUTINE_HERK) || defined(ROUTINE_SYR2K) || defined(ROUTINE_HER2K)
+ if (upper == 1) { condition = (id_two >= id_one); }
+ else if (lower == 1) { condition = (id_two <= id_one); }
+ #endif
+ if (condition) {
+
+ // Copies the value into the destination matrix. This is always within bounds of the source
+ // matrix, as we know that the destination matrix is smaller or equal to the source.
+ if (id_two < dest_two && id_one < dest_one) {
+ real value = src[id_two*src_ld + id_one + src_offset];
+ if (diagonal_imag_zero == 1 && id_one == id_two) { ImagToZero(value); }
+ dest[id_two*dest_ld + id_one + dest_offset] = value;
+ }
+ }
+ }
+ }
+}
+
+// =================================================================================================
+
+// End of the C++11 raw string literal
+)"
+
+// =================================================================================================