OpenBLAS/test/compare_sgemv_sbgemv.c

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#include <stdio.h>
#include <stdint.h>
#include "../common.h"

#include "test_helpers.h"

#define SGEMV   BLASFUNC(sgemv)
#define SBGEMV   BLASFUNC(sbgemv)
#define SBGEMV_LARGEST  256

int
main (int argc, char *argv[])
{
  blasint k;
  int i, j, l;
  blasint x, y;
  int ret = 0;
  int loop = SBGEMV_LARGEST;
  char transA = 'N';
  float alpha = 1.0, beta = 0.0;

  for (beta = 0; beta < 3; beta += 1) {
  for (alpha = 0; alpha < 3; alpha += 1) {
  for (l = 0; l < 2; l++) {  // l = 1 to test inc_x & inc_y not equal to one.
  for (x = 1; x <= loop; x++)
  {
    k = (x == 0) ? 0 : l + 1;
    float *A = (float *)malloc_safe(x * x * sizeof(FLOAT));
    float *B = (float *)malloc_safe(x * sizeof(FLOAT) << l);
    float *C = (float *)malloc_safe(x * sizeof(FLOAT) << l);
    bfloat16 *AA = (bfloat16 *)malloc_safe(x * x * sizeof(bfloat16));
    bfloat16 *BB = (bfloat16 *)malloc_safe(x * sizeof(bfloat16) << l);
    float *CC = (float *)malloc_safe(x * sizeof(FLOAT) << l);
    float *DD = (float *)malloc_safe(x * sizeof(FLOAT));
    if ((A == NULL) || (B == NULL) || (C == NULL) || (AA == NULL) || (BB == NULL) ||
        (DD == NULL) || (CC == NULL))
      return 1;
    blasint one = 1;

    for (j = 0; j < x; j++)
    {
      for (i = 0; i < x; i++)
      {
        A[j * x + i] = ((FLOAT) rand () / (FLOAT) RAND_MAX) + 0.5;
        sbstobf16_(&one, &A[j*x+i], &one, &AA[j * x + i], &one);
      }
      B[j << l] = ((FLOAT) rand () / (FLOAT) RAND_MAX) + 0.5;
      sbstobf16_(&one, &B[j << l], &one, &BB[j << l], &one);
      
      CC[j << l] = C[j << l] = ((FLOAT) rand () / (FLOAT) RAND_MAX) + 0.5;
    }

    for (y = 0; y < 2; y++)
    {
      if (y == 0) {
        transA = 'N';
      } else {
        transA = 'T';
      }

      memset(CC, 0, x * sizeof(FLOAT) << l);
      memset(DD, 0, x * sizeof(FLOAT));
      memset(C, 0, x * sizeof(FLOAT) << l);

      SGEMV (&transA, &x, &x, &alpha, A, &x, B, &k, &beta, C, &k);
      SBGEMV (&transA, &x, &x, &alpha, (bfloat16*) AA, &x, (bfloat16*) BB, &k, &beta, CC, &k);

      for (int i = 0; i < x; i ++) DD[i] *= beta;

      for (j = 0; j < x; j++)
        for (i = 0; i < x; i++)
          if (transA == 'N') {
            DD[i] += alpha * float16to32 (AA[j * x + i]) * float16to32 (BB[j << l]);
          } else if (transA == 'T') {
            DD[j] += alpha * float16to32 (AA[j * x + i]) * float16to32 (BB[i << l]);
          }

      for (j = 0; j < x; j++) {
        if (!is_close(CC[j << l], C[j << l], 0.01, 0.001)) {
          ret++;
        }
        if (!is_close(CC[j << l], DD[j], 0.001, 0.0001)) {
          ret++;
        }
      }
    }
    free(A);
    free(B);
    free(C);
    free(AA);
    free(BB);
    free(DD);
    free(CC);
  } // x
  } // l
  } // alpha
  } // beta

  if (ret != 0)
    fprintf (stderr, "FATAL ERROR SBGEMV - Return code: %d\n", ret);
  return ret;
}