DPCT1016#

Note

This diagnostic message is no longer generated by SYCLomatic.

Message#

The <API name> was not migrated, because parameter(s) <parameter name a> and/or <parameter name b> could not be evaluated, or because <parameter name a> is not equal to <parameter name b>. Rewrite this code manually.

Detailed Help#

The cublasSetMatrix can be migrated by SYCLomatic only when lda and ldb have the same constant value. In cases where the migration did not occur, rewrite the code manually.

  • If the values of lda and ldb are the same, you can use the following code:

    dpct::dpct_memcpy((void*)(B), (void*)(A), lda*cols*elemSize, dpct::host_to_device); // For cublasGetMatrix, use dpct::device_to_host

  • Otherwise, you can copy the columns of the matrix or elements of the vector one by one.

    • The equivalent of cublasSetMatrix(rows, cols, elemSize, A, lda, B, ldb) is:

       1  auto A_backup = A;
 2  auto B_backup = B;
 3  A = A - lda;
 4  B = B - ldb;
 5  for (int c = 0; c < cols; ++c) {
 6    A = A + lda;
 7    B = B + ldb;
 8    dpct::dpct_memcpy(
 9        (void *)(B), (void *)(A), rows * elemSize,
10        dpct::host_to_device); // For cublasGetMatrix, use dpct::device_to_host
11  }
12  A = A_backup;
13  B = B_backup;

SYCLomatic can migrate the cublasSetVector only when incx and incy have the same constant value. In cases where the migration does not occur, rewrite the code manually.

  • If the values of incx and incy are the same, you can use the following code:

    dpct::dpct_memcpy((void*)(B), (void*)(A), n*incx*elemSize, dpct::host_to_device); // For cublasGetVector, use dpct::device_to_host

  • Otherwise, you can copy the elements of the vector one by one:

    • To replace cublasGetVector(n, elemSize, x, incx, y, incy), use the following snippet:

       1  auto x_backup = x;
 2  auto y_backup = y;
 3  x = x - incx;
 4  y = y - incy;
 5  for (int c = 0; c < n; ++c) {
 6    x = x + incx;
 7    y = y + incy;
 8    dpct::dpct_memcpy(
 9        (void *)(y), (void *)(x), elemSize,
10        dpct::device_to_host); // for cublasSetVector, use dpct::host_to_device
11  }
12  x = x_backup;
13  y = y_backup;

Suggestions to Fix#

Review the logic and adjust it.