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111
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1 /* { dg-require-effective-target vect_int } */
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2 /* { dg-require-effective-target arm_v8_2a_dotprod_neon_hw { target { aarch64*-*-* || arm*-*-* } } } */
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3 /* { dg-additional-options "-march=armv8.2-a+dotprod" { target { aarch64*-*-* } } } */
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4 /* { dg-add-options arm_v8_2a_dotprod_neon } */
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5
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6 #include <stdarg.h>
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7 #include "tree-vect.h"
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8
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9 #define N 64
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10
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11 #define DOT 43680
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12
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13 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};
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14 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};
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15
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16 /* char->short->int dot product.
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17 Detected as a dot-product pattern.
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18 Should be vectorized on targets that support dot-product for unsigned chars
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19 (vect_udot_qi),
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20 and on targets that support widening-multiplication and widening-summation
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21 (vect_widen_mult_qi && vec_widen_sum_qi_to_si).
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22 Widening-multiplication can also be supported by type promotion and non-widening
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23 multiplication (vect_unpack && vect_short_mult);
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24 Widening summation can also be supported by type promotion and non-widening
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25 summation (vect_unpack).
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26 */
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27 __attribute__ ((noinline)) unsigned int
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28 foo (int len) {
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29 int i;
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30 unsigned int result = 0;
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31 unsigned short prod;
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32
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33 for (i=0; i<len; i++) {
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34 prod = X[i] * Y[i];
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35 result += prod;
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36 }
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37 return result;
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38 }
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39
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40 int main (void)
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41 {
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42 unsigned int dot;
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43 int i;
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44
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45 check_vect ();
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46
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47 dot = foo (N);
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48 if (dot != DOT)
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49 abort ();
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50
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51 return 0;
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52 }
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53
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54 /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
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55 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_udot_qi } } } */
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56 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi && vect_widen_sum_qi_to_si } } } } */
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57
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58
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