gcc/testsuite/gcc.dg/vect/vect-div-bitmask-5.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdint.h>
   4 #include <stdio.h>
   5 #include "tree-vect.h"
   6
   7 #define N 50
   8 #define TYPE uint8_t
   9
  10 #ifndef DEBUG
  11 #define DEBUG 0
  12 #endif
  13
  14 #define BASE ((TYPE) -1 < 0 ? -126 : 4)
  15
  16
  17 __attribute__((noipa, noinline, optimize("O1")))
  18 void fun1(TYPE* restrict pixel, TYPE level, int n)
  19 {
  20   for (int i = 0; i < n; i+=1)
  21     pixel[i] = (pixel[i] + level) / 0xff;
  22 }
  23
  24 __attribute__((noipa, noinline, optimize("O3")))
  25 void fun2(TYPE* restrict pixel, TYPE level, int n)
  26 {
  27   for (int i = 0; i < n; i+=1)
  28     pixel[i] = (pixel[i] + level) / 0xff;
  29 }
  30
  31 int main ()
  32 {
  33   TYPE a[N];
  34   TYPE b[N];
  35
  36   for (int i = 0; i < N; ++i)
  37     {
  38       a[i] = BASE + i * 13;
  39       b[i] = BASE + i * 13;
  40       if (DEBUG)
  41         printf ("%d: 0x%x\n", i, a[i]);
  42     }
  43
  44   fun1 (a, N / 2, N);
  45   fun2 (b, N / 2, N);
  46
  47 #pragma GCC novector
  48   for (int i = 0; i < N; ++i)
  49     {
  50       if (DEBUG)
  51         printf ("%d = 0x%x == 0x%x\n", i, a[i], b[i]);
  52
  53       if (a[i] != b[i])
  54         __builtin_abort ();
  55     }
  56   return 0;
  57 }
  58
  59 /* { dg-final { scan-tree-dump "divmod pattern recognized" "vect" { target aarch64*-*-* } } } */