gcc/testsuite/gcc.dg/vect/vect-avg-11.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-additional-options "-fdump-tree-optimized" } */
   3
   4 #include "tree-vect.h"
   5
   6 #define N 50
   7
   8 #ifndef SIGNEDNESS
   9 #define SIGNEDNESS unsigned
  10 #endif
  11 #ifndef BIAS
  12 #define BIAS 0
  13 #endif
  14
  15 void __attribute__ ((noipa))
  16 f (SIGNEDNESS char *restrict a, SIGNEDNESS char *restrict b,
  17    SIGNEDNESS char *restrict c)
  18 {
  19   for (__INTPTR_TYPE__ i = 0; i < N; ++i)
  20     {
  21       int tmp = b[i];
  22       tmp ^= 0x55;
  23       tmp += BIAS;
  24       tmp += c[i];
  25       tmp >>= 1;
  26       tmp |= 0x40;
  27       a[i] = tmp;
  28     }
  29 }
  30
  31 #define BASE1 ((SIGNEDNESS int) -1 < 0 ? -126 : 4)
  32 #define BASE2 ((SIGNEDNESS int) -1 < 0 ? -101 : 26)
  33
  34 int
  35 main (void)
  36 {
  37   check_vect ();
  38
  39   SIGNEDNESS char a[N], b[N], c[N];
  40   for (int i = 0; i < N; ++i)
  41     {
  42       b[i] = BASE1 + i * 5;
  43       c[i] = BASE2 + i * 4;
  44       asm volatile ("" ::: "memory");
  45     }
  46   f (a, b, c);
  47 #pragma GCC novector
  48   for (int i = 0; i < N; ++i)
  49     if (a[i] != (((((BASE1 + i * 5) ^ 0x55)
  50                    + (BASE2 + i * 4)
  51                    + BIAS) >> 1) | 0x40))
  52       __builtin_abort ();
  53   return 0;
  54 }
  55
  56 /* { dg-final { scan-tree-dump "vect_recog_average_pattern: detected" "vect" } } */
  57 /* { dg-final { scan-tree-dump {\.AVG_FLOOR} "vect" { target vect_avg_qi } } } */
  58 /* { dg-final { scan-tree-dump-not {vector\([^\n]*short} "optimized" { target vect_avg_qi } } } */
  59 /* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" { target vect_avg_qi } } } */