topic I forgot to mention that the in Intel® oneAPI Math Kernel Library

Compilation Errors with MKL_DIRECT_CALL_SEQ

Daniele_S_1 — Fri, 15 Jul 2016 17:17:26 GMT

Hi,

I'm compiling a cpp file that includes mkl.h and contains a single cblas_dgemm call with the following:

icpc -DMKL_DIRECT_CALL_SEQ -DMKL_ILP64 -I/opt/intel/mkl/include -c -o main.o main.cpp

Compilation breaks and I get mutliple times the following message:

error: expression must be an lvalue or a function designator
    cblas_dgemm(CblasRowMajor, CblasNoTrans, CblasNoTrans, 4, 4, 4, 1, A, 4, B, 4, 1, C, 4);

If a remove -DMKL_DIRECT_CALL_SEQ the compilation works as expected.

Is this a bug or am I doing anything wrong?

Thanks,

Daniele

I forgot to mention that the

Daniele_S_1 — Fri, 15 Jul 2016 17:19:59 GMT

I forgot to mention that the very same code used to compile with Intel MKL 11.2 and that now I've upgraded to Intel MKL 11.3.2.

Daniele

Hi Daniele,

Ying_H_Intel — Mon, 18 Jul 2016 02:50:34 GMT

Hi Daniele,

Thanks for the report. The issue looks familiar. We will check and get back to you later.

Thanks

Ying

Hi Daniele~

Sarah_K_Intel — Mon, 18 Jul 2016 21:05:07 GMT

Hi Daniele~

Thank you for your interest in this functionality! Direct call support for CBLAS interfaces was introduced in Intel MKL 11.2.2, which may explain why the compilation works as expected for Intel MKL 11.2. The implementation assumes that variables, rather than literals, are passed as arguments to the cblas_dgemm call. We will need to change the implementation to allow both variables and literals to work for the CBLAS interfaces with direct call.

In the meantime, if you change your code to:

MKL_INT four = 4;

double one = 1.0;

cblas_dgemm(CblasRowMajor, CblasNoTrans, CblasNoTrans, four, four, four, one, A, four, B, four, one, C, four);

instead of

cblas_dgemm(CblasRowMajor, CblasNoTrans, CblasNoTrans, 4, 4, 4, 1, A, 4, B, 4, 1, C, 4);

does the compilation succeed?

Thanks,

Sarah

Dear All,

Ying_H_Intel — Mon, 14 Nov 2016 03:39:49 GMT

Dear All,

Just update the thread. MKL 2017 update 1 release recently, which fix the issue.

@Daniele, thank you for report the bug!

Best Regards,

Ying