Viewing file:  vect-reduc-dot-s16b.c (1.25 KB) -rw-r--r--
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/* { dg-require-effective-target vect_int } */
#include <stdarg.h>
#include "tree-vect.h"
#define N 64
#define DOT 43680
signed short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
signed short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
/* short->short->int dot product. Should be vectorized on architectures
supporting vectorized multiplication of two short args with short result,
e.g "mulv4hi3" and widenning sum */
__attribute__ ((noinline)) int
foo (int len)
{
int i;
int result = 0;
short prod;
for (i = 0; i < len; i++)
{
prod = X[i] * Y[i];
result += prod;
}
return result;
}
int
main (void)
{
int i, dot;
check_vect ();
for (i = 0; i < N; i++)
{
X[i] = i;
Y[i] = 64 - i;
__asm__ volatile ("");
}
dot = foo (N);
if (dot != DOT)
abort ();
return 0;
}
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_short_mult && { vect_widen_sum_hi_to_si || vect_unpack } } } } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { ! vect_short_mult } } } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { { ! vect_widen_sum_hi_to_si } && { ! vect_unpack } } } } } */
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