1 /* { dg-require-effective-target vect_int } */
2 /* { dg-require-effective-target arm_v8_2a_dotprod_neon_hw { target { aarch64*-*-* || arm*-*-* } } } */
3 /* { dg-additional-options "-march=armv8.2-a+dotprod" { target { aarch64*-*-* } } } */
4 /* { dg-add-options arm_v8_2a_dotprod_neon }  */
5 
6 #include <stdarg.h>
7 #include "tree-vect.h"
8 
9 #define N 64
10 
11 #define DOT1 43680
12 
13 signed char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
14 signed char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
15 
16 /* char->short->int dot product.
17    The dot-product pattern should be detected.
18    Vectorizable on vect_sdot_qi targets (targets that support dot-product of
19    signed chars).
20 
21    In the future could also be vectorized as widening-mult + widening-summation,
22    or with type-conversion support.
23  */
24 __attribute__ ((noinline)) int
foo1(int len)25 foo1(int len) {
26   int i;
27   int result = 0;
28   short prod;
29 
30   for (i=0; i<len; i++) {
31     prod = X[i] * Y[i];
32     result += prod;
33   }
34   return result;
35 }
36 
main(void)37 int main (void)
38 {
39   int i, dot1;
40 
41   check_vect ();
42 
43   for (i=0; i<N; i++) {
44     X[i] = i;
45     Y[i] = 64-i;
46     __asm__ volatile ("");
47   }
48 
49   dot1 = foo1 (N);
50   if (dot1 != DOT1)
51     abort ();
52 
53   return 0;
54 }
55 
56 /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
57 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */
58 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } } } */
59 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi && vect_widen_sum_hi_to_si } } } } */
60 
61