Viewing file:  var_stride_1.h (1.51 KB) -rw-r--r--
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extern void abort (void) __attribute__ ((noreturn));
#define MARGIN 6
void __attribute__ ((weak, optimize ("no-tree-vectorize")))
test (int n, int m, int offset)
{
int abs_n = (n < 0 ? -n : n);
int abs_m = (m < 0 ? -m : m);
int max_i = (abs_n > abs_m ? abs_n : abs_m);
int abs_offset = (offset < 0 ? -offset : offset);
int size = MARGIN * 2 + max_i * SIZE + abs_offset;
TYPE *array = (TYPE *) __builtin_alloca (size * sizeof (TYPE));
for (int i = 0; i < size; ++i)
array[i] = i;
int base_x = offset < 0 ? MARGIN - offset : MARGIN;
int base_y = offset < 0 ? MARGIN : MARGIN + offset;
int start_x = n < 0 ? base_x - n * (SIZE - 1) : base_x;
int start_y = m < 0 ? base_y - m * (SIZE - 1) : base_y;
f (&array[start_x], &array[start_y], n, m);
int j = 0;
int start = (n < 0 ? size - 1 : 0);
int end = (n < 0 ? -1 : size);
int inc = (n < 0 ? -1 : 1);
for (int i = start; i != end; i += inc)
{
if (j == SIZE || i != start_x + j * n)
{
if (array[i] != i)
abort ();
}
else if (n == 0)
{
TYPE sum = i;
for (; j < SIZE; j++)
{
int next_y = start_y + j * m;
if (n >= 0 ? next_y < i : next_y > i)
sum += array[next_y];
else if (next_y == i)
sum += sum;
else
sum += next_y;
}
if (array[i] != sum)
abort ();
}
else
{
int next_y = start_y + j * m;
TYPE base = i;
if (n >= 0 ? next_y < i : next_y > i)
base += array[next_y];
else
base += next_y;
if (array[i] != base)
abort ();
j += 1;
}
}
}
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