Quote:

Kevin Davis (Intel) wrote:

The undefined references occur when linking for the host-side since those do not exist for the host. You would conditionalize the use in the offload code with:

#ifdef __MIC__

<Phi intrinsic code here>

#else

<Host side equivalent code here>

#endif

If you have not already, look at the C sample under:

/opt/intel/composer_xe_2013/Samples/en_US/C++/mic_samples/intro_sampleC/sampleC006.c

 

Thank you a lot!  It compiled the program successfully.

  Thanks for the reply above,but i have a new problem. When i use "__mm512_store_ps(...)" (or other functons like this) to store data to an array ,i got an error when i run the program.
      
      offload error: process on the device 0 was terminated by signal 11
      
      And the code:
      
      
      #pragma offload_attribute (push,target(mic))
      void function(...)
      {
      static float __attribute__((target(mic),aligned(64))) d_wt[BLOCKSIZE*THREADSNUM] ;
      
      ... ...
      
      #pragma omp parallel for  private(... ,start,_d_wt,...) schedule(dynamic,1)
      {
      ...
      _d_wt=_mm512_loadunpacklo_ps (_d_wt, (void*)(&Random_matrix[k])  );
      _d_wt=_mm512_loadunpackhi_ps (_d_wt, (void*)(&Random_matrix[k])  );
      //_d_wt=_mm512_load_ps (&Random_matrix[k]);
      
      _mm512_packstorelo_ps((void*)(&d_wt[start])   , _d_wt );
      _mm512_packstorehi_ps((void*)(&d_wt[start+16]), _d_wt );
      
      // ------>   start= 16 * omp_get_thread_num();
      
      
      //_mm512_store_ps(d_wt,_d_wt);
      ...
      }
      ... ...
      
      }
      
      I wonder why this happened.Thanks.~

Thank you . I have checked the Random_matrix . It seems ok . I write a new program to show the problem. There are two cases. In case two,i use an usual method to calculate,and there is no error . In case one,i use "_mm512_store_ps" to store data to array. But i got the same error "offload error: process on the device 0 was terminated by signal 11" I also try to use "_mm512_store_ps((void*)(&B[k]),_C);" instead of "_mm512_store_ps((void*)(&X[k]),_C);" to store data to array B. But i still got the same error.I pasted all code below .

#include <stdlib.h>
#include <stdio.h>

#define SIZE 1024

#define CASE1
//#define CASE2

#pragma offload_attribute (push,target(mic))
#include "immintrin.h"
void calculate(float* A,float* B)
{
        static float __attribute__((target(mic),aligned(64))) X[SIZE] ;

         int k,i;

        __m512 _A;
        __m512 _B;
        __m512 _C;

      #ifdef __MIC__
        for(k=0;k<SIZE;k+=16)
        {

                _A=_mm512_load_ps((void*)(&A[k]));
                _B=_mm512_load_ps((void*)(&B[k]));

                _C=_mm512_add_ps(_A,_B);

                #ifdef CASE1
                _mm512_store_ps((void*)(&X[k]),_C);
                #endif

                for(i=k;i<k+16;i++)
                {
                        #ifdef CASE2
                        X[i]=A[i]+B[i];
                        #endif

                        printf("%2.f ",X[i]);
                }
                printf("\n");
        }
        #endif

}

#pragma offload_attribute (pop)

int  main()
{
        int i;
        float *A;
        float *B;
        A=(float*)malloc(sizeof(float)*SIZE);
        B=(float*)malloc(sizeof(float)*SIZE);
        for(i=0;i<SIZE;i++)
        {
                A[i]=i;
                B[i]=i;
        }

        #pragma offload_transfer target(mic:0)\
        in(A:length(SIZE) alloc_if(1) free_if(0))\
        in(B:length(SIZE) alloc_if(1) free_if(0))\
                 
        #pragma offload target(mic:0) \
        in(A:length(0) alloc_if(0) free_if(0))\
        in(B:length(0) alloc_if(0) free_if(0))
        calculate(A,B);

        return 1;
}

Thank you very much!

Problem was solved with your advice!