| /* { dg-require-effective-target vect_int } */ |
| /* { dg-require-effective-target arm_v8_2a_dotprod_neon_hw { target { aarch64*-*-* || arm*-*-* } } } */ |
| /* { dg-additional-options "-march=armv8.2-a+dotprod" { target { aarch64*-*-* } } } */ |
| /* { dg-add-options arm_v8_2a_dotprod_neon } */ |
| |
| #include <stdarg.h> |
| #include "tree-vect.h" |
| |
| #define N 64 |
| |
| #define DOT 43680 |
| |
| unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63}; |
| unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1}; |
| |
| /* char->short->int dot product. |
| Detected as a dot-product pattern. |
| Should be vectorized on targets that support dot-product for unsigned chars |
| (vect_udot_qi), |
| and on targets that support widening-multiplication and widening-summation |
| (vect_widen_mult_qi && vec_widen_sum_qi_to_si). |
| Widening-multiplication can also be supported by type promotion and non-widening |
| multiplication (vect_unpack && vect_short_mult); |
| Widening summation can also be supported by type promotion and non-widening |
| summation (vect_unpack). |
| */ |
| __attribute__ ((noinline)) unsigned int |
| foo (int len) { |
| int i; |
| unsigned int result = 0; |
| unsigned short prod; |
| |
| for (i=0; i<len; i++) { |
| prod = X[i] * Y[i]; |
| result += prod; |
| } |
| return result; |
| } |
| |
| int main (void) |
| { |
| unsigned int dot; |
| int i; |
| |
| check_vect (); |
| |
| dot = foo (N); |
| if (dot != DOT) |
| abort (); |
| |
| return 0; |
| } |
| |
| /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */ |
| /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_udot_qi } } } */ |
| /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi && vect_widen_sum_qi_to_si } } } } */ |
| |
| |