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/* { dg-do compile { target { powerpc*-*-* } } } */
/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power9" } } */
/* { dg-require-effective-target powerpc_p9vector_ok } */
/* { dg-skip-if "" { powerpc*-*-aix* } } */
/* { dg-options "-O3 -mcpu=power9" } */
/* Verify that we vectorize this SAD loop using vabsdub. */
extern int abs (int __x) __attribute__ ((__nothrow__, __leaf__)) __attribute__ ((__const__));
static int
foo (unsigned char *w, int i, unsigned char *x, int j)
{
int tot = 0;
for (int a = 0; a < 16; a++)
{
for (int b = 0; b < 16; b++)
tot += abs (w[b] - x[b]);
w += i;
x += j;
}
return tot;
}
void
bar (unsigned char *w, unsigned char *x, int i, int *result)
{
*result = foo (w, 16, x, i);
}
/* { dg-final { scan-assembler-times "vabsdub" 16 } } */
/* { dg-final { scan-assembler-times "vsum4ubs" 16 } } */
/* { dg-final { scan-assembler-times "vadduwm" 17 } } */
/* Note: One of the 16 adds is optimized out (add with zero),
leaving 15. The extra two adds are for the final reduction. */
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