Subversion Repositories openrisc_2011-10-31

extern void abort (void);

typedef float v4flt __attribute__ ((vector_size (16)));

void __attribute__ ((noinline)) foo (float *dst, float **src, int a, int n)

{

  int i, j;

  int z = sizeof (v4flt) / sizeof (float);

  unsigned m = sizeof (v4flt) - 1;

  for (j = 0; j < n && (((unsigned long) dst + j) & m); ++j)

    {

      float t = src[0][j];

      for (i = 1; i < a; ++i)

        t += src[i][j];

      dst[j] = t;

    }

  for (; j < (n - (4 * z - 1)); j += 4 * z)

    {

      v4flt t0 = *(v4flt *) (src[0] + j + 0 * z);

      v4flt t1 = *(v4flt *) (src[0] + j + 1 * z);

      v4flt t2 = *(v4flt *) (src[0] + j + 2 * z);

      v4flt t3 = *(v4flt *) (src[0] + j + 3 * z);

      for (i = 1; i < a; ++i)

        {

          t0 += *(v4flt *) (src[i] + j + 0 * z);

          t1 += *(v4flt *) (src[i] + j + 1 * z);

          t2 += *(v4flt *) (src[i] + j + 2 * z);

          t3 += *(v4flt *) (src[i] + j + 3 * z);

        }

      *(v4flt *) (dst + j + 0 * z) = t0;

      *(v4flt *) (dst + j + 1 * z) = t1;

      *(v4flt *) (dst + j + 2 * z) = t2;

      *(v4flt *) (dst + j + 3 * z) = t3;

    }

  for (; j < n; ++j)

    {

      float t = src[0][j];

      for (i = 1; i < a; ++i)

        t += src[i][j];

      dst[j] = t;

    }

}

float buffer[64];

int

main (void)

{

  int i;

  float *dst, *src[2];

  char *cptr;

  cptr = (char *)buffer;

  cptr += (-(long int) buffer & (16 * sizeof (float) - 1));

  dst = (float *)cptr;

  src[0] = dst + 16;

  src[1] = dst + 32;

  for (i = 0; i < 16; ++i)

    {

      src[0][i] = (float) i + 11 * (float) i;

      src[1][i] = (float) i + 12 * (float) i;

    }

  foo (dst, src, 2, 16);

  for (i = 0; i < 16; ++i)

    {

      float e = (float) i + 11 * (float) i + (float) i + 12 * (float) i;

      if (dst[i] != e)

        abort ();

    }

  return 0;

}