gcc/testsuite/gcc.dg/vect/vect-avg-1.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include "tree-vect.h"
   4
   5 #define N 50
   6
   7 #ifndef SIGNEDNESS
   8 #define SIGNEDNESS unsigned
   9 #endif
  10 #ifndef BIAS
  11 #define BIAS 0
  12 #endif
  13
  14 void __attribute__ ((noipa))
  15 f (SIGNEDNESS char *restrict a, SIGNEDNESS char *restrict b,
  16    SIGNEDNESS char *restrict c)
  17 {
  18   for (__INTPTR_TYPE__ i = 0; i < N; ++i)
  19     a[i] = (b[i] + c[i] + BIAS) >> 1;
  20 }
  21
  22 #define BASE1 ((SIGNEDNESS int) -1 < 0 ? -126 : 4)
  23 #define BASE2 ((SIGNEDNESS int) -1 < 0 ? -101 : 26)
  24
  25 int
  26 main (void)
  27 {
  28   check_vect ();
  29
  30   SIGNEDNESS char a[N], b[N], c[N];
  31   for (int i = 0; i < N; ++i)
  32     {
  33       b[i] = BASE1 + i * 5;
  34       c[i] = BASE2 + i * 4;
  35       asm volatile ("" ::: "memory");
  36     }
  37   f (a, b, c);
  38   for (int i = 0; i < N; ++i)
  39     if (a[i] != ((BASE1 + BASE2 + i * 9 + BIAS) >> 1))
  40       __builtin_abort ();
  41   return 0;
  42 }
  43
  44 /* { dg-final { scan-tree-dump "vect_recog_average_pattern: detected" "vect" } } */
  45 /* { dg-final { scan-tree-dump {\.AVG_FLOOR} "vect" { target vect_avg_qi } } } */
  46 /* { dg-final { scan-tree-dump-not {vector\([^\n]*short} "vect" { target vect_avg_qi } } } */
  47 /* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" { target vect_avg_qi } } } */