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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;
}
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