OpenBLAS/test/compare_sgemv_bgemv.c

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

#include "test_helpers.h"

#define SGEMV BLASFUNC(sgemv)
#define BGEMV BLASFUNC(bgemv)
#define BGEMV_LARGEST 256

int main(int argc, char *argv[])
{
  blasint k;
  int i, j, l;
  blasint x, y;
  blasint one = 1;
  int ret = 0;
  int loop = BGEMV_LARGEST;
  char transA = 'N';
  float alpha = 1.0, beta = 0.0;
  bfloat16 alpha_bf16, beta_bf16;

  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);
          bfloat16 *CC = (bfloat16 *)malloc_safe(x * sizeof(bfloat16) << l);
          float *DD = (float *)malloc_safe(x * sizeof(FLOAT));
          if ((A == NULL) || (B == NULL) || (C == NULL) || (AA == NULL) || (BB == NULL) ||
              (CC == NULL) || (DD == NULL))
            return 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);

            C[j << l] = ((FLOAT)rand() / (FLOAT)RAND_MAX) + 0.5;
            sbstobf16_(&one, &B[j << l], &one, &CC[j << l], &one);
          }

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

            memset(C, 0, x * sizeof(FLOAT) << l);
            memset(CC, 0, x * sizeof(bfloat16) << l);
            memset(DD, 0, x * sizeof(FLOAT));

            sbstobf16_(&one, &alpha, &one, &alpha_bf16, &one);
            sbstobf16_(&one, &beta, &one, &beta_bf16, &one);
            SGEMV(&transA, &x, &x, &alpha, A, &x, B, &k, &beta, C, &k);
            BGEMV(&transA, &x, &x, &alpha_bf16, AA, &x, BB, &k, &beta_bf16, CC, &k);

            for (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(float16to32(CC[j << l]), truncate_float32_to_bfloat16(C[j << l]), 0.01, 0.001))
              {
#ifdef DEBUG
                printf("Mismatch at trans=%c, alpha=%.2f, beta=%.2f, i=%d, j=%d, k=%ld: CC=%.6f, C=%.6f\n",
                       transA, alpha, beta, i, j, k, float16to32(CC[j << l]), truncate_float32_to_bfloat16(C[j << l]));
#endif
                ret++;
              }
              if (!is_close(float16to32(CC[j << l]), truncate_float32_to_bfloat16(DD[j]), 0.001, 0.0001))
              {
#ifdef DEBUG
                printf("Mismatch at trans=%c, alpha=%.2f, beta=%.2f, i=%d, j=%d, k=%ld: CC=%.6f, C=%.6f\n",
                       transA, alpha, beta, i, j, k, float16to32(CC[j << l]), truncate_float32_to_bfloat16(DD[j]));
#endif
                ret++;
              }
            }
          }

          free(A);
          free(B);
          free(C);
          free(AA);
          free(BB);
          free(CC);
          free(DD);
        } // x
      } // l
    } // alpha
  } // beta

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