mt/bh_matmul.c

   1 #include "stdlib.h"
   2
   3 #include "util.h"
   4
   5 #include "dataset.h"
   6 void __attribute__((noinline)) matmul(const int coreid, const int ncores, const int lda,  const data_t A[], const data_t B[], data_t C[] )
   7 {
   8
   9    // ***************************** //
  10    // **** ADD YOUR CODE HERE ***** //
  11    // ***************************** //
  12    //
  13    // feel free to make a separate function for MI and MSI versions.
  14    if(coreid > 1) return;
  15
  16     int m, i, j, k, iB0, iB1;
  17     data_t tempC0, tempC1, tempC2, tempC3, tempC4, tempC5, tempC6, tempC7;
  18     data_t tempA0, tempA1;
  19
  20     if (coreid == 0){
  21         for (m = 0; m < 2; m++){
  22             for (j = 0; j < lda/2; j++){
  23                 for (i = 0; i < lda; i+=8){
  24                     tempC0 = C[i + j*lda];
  25                     tempC1 = C[i + j*lda+1];
  26                     tempC2 = C[i + j*lda+2];
  27                     tempC3 = C[i + j*lda+3];
  28                     tempC4 = C[i + j*lda+4];
  29                     tempC5 = C[i + j*lda+5];
  30                     tempC6 = C[i + j*lda+6];
  31                     tempC7 = C[i + j*lda+7];
  32                     iB0 = m*lda*lda/2+i;
  33                     iB1 = iB0+lda;
  34                     for (k = m*lda/2; k < (m+1)*lda/2; k+=2){
  35                         tempA0 = A[j*lda+k];
  36                         tempA1 = A[j*lda+k+1];
  37                         tempC0 += tempA0*B[iB0]+tempA1*B[iB1];
  38                         tempC1 += tempA0*B[iB0+1]+tempA1*B[iB1+1];
  39                         tempC2 += tempA0*B[iB0+2]+tempA1*B[iB1+2];
  40                         tempC3 += tempA0*B[iB0+3]+tempA1*B[iB1+3];
  41                         tempC4 += tempA0*B[iB0+4]+tempA1*B[iB1+4];
  42                         tempC5 += tempA0*B[iB0+5]+tempA1*B[iB1+5];
  43                         tempC6 += tempA0*B[iB0+6]+tempA1*B[iB1+6];
  44                         tempC7 += tempA0*B[iB0+7]+tempA1*B[iB1+7];
  45                         iB0 += 2*lda;
  46                         iB1 += 2*lda;
  47
  48                     }
  49                     C[i + j*lda] = tempC0;
  50                     C[i + j*lda + 1] = tempC1;
  51                     C[i + j*lda + 2] = tempC2;
  52                     C[i + j*lda + 3] = tempC3;
  53                     C[i + j*lda + 4] = tempC4;
  54                     C[i + j*lda + 5] = tempC5;
  55                     C[i + j*lda + 6] = tempC6;
  56                     C[i + j*lda + 7] = tempC7;
  57                 }
  58             }
  59         }
  60     }
  61     if(coreid == 1 || ncores == 1) {
  62         for (m = 2; m > 0; m--){
  63             for (j = lda-1; j >= lda/2; j--){
  64                 for (i = lda-1; i >= 0; i-=8){
  65                     tempC0 = C[i + j*lda];
  66                     tempC1 = C[i + j*lda - 1];
  67                     tempC2 = C[i + j*lda - 2];
  68                     tempC3 = C[i + j*lda - 3];
  69                     tempC4 = C[i + j*lda - 4];
  70                     tempC5 = C[i + j*lda - 5];
  71                     tempC6 = C[i + j*lda - 6];
  72                     tempC7 = C[i + j*lda - 7];
  73                     for (k = m*lda/2-1; k >= (m-1)*lda/2; k-=2){
  74                         tempA0 = A[j*lda+k];
  75                         tempA1 = A[j*lda+k-1];
  76                         tempC0 += tempA0*B[k*lda+i]+tempA1*B[(k-1)*lda+i];
  77                         tempC1 += tempA0*B[k*lda+i-1]+tempA1*B[(k-1)*lda+i-1];
  78                         tempC2 += tempA0*B[k*lda+i-2]+tempA1*B[(k-1)*lda+i-2];
  79                         tempC3 += tempA0*B[k*lda+i-3]+tempA1*B[(k-1)*lda+i-3];
  80                         tempC4 += tempA0*B[k*lda+i-4]+tempA1*B[(k-1)*lda+i-4];
  81                         tempC5 += tempA0*B[k*lda+i-5]+tempA1*B[(k-1)*lda+i-5];
  82                         tempC6 += tempA0*B[k*lda+i-6]+tempA1*B[(k-1)*lda+i-6];
  83                         tempC7 += tempA0*B[k*lda+i-7]+tempA1*B[(k-1)*lda+i-7];
  84                     }
  85                     C[i + j*lda] = tempC0;
  86                     C[i + j*lda - 1] = tempC1;
  87                     C[i + j*lda - 2] = tempC2;
  88                     C[i + j*lda - 3] = tempC3;
  89                     C[i + j*lda - 4] = tempC4;
  90                     C[i + j*lda - 5] = tempC5;
  91                     C[i + j*lda - 6] = tempC6;
  92                     C[i + j*lda - 7] = tempC7;
  93                 }
  94             }
  95         }
  96     }
  97 }