gcc/testsuite/gcc.target/avr/torture/sat-ur-plus-minus.c

   1 /* { dg-do run } */
   2 /* { dg-options "-std=gnu99 -fwrapv" } */
   3
   4 #include "fix-types.h"
   5
   6 extern void abort (void);
   7 extern void exit (int);
   8
   9 typedef unsigned _Fract fx_t;
  10 typedef unsigned _Sat _Fract satfx_t;
  11 typedef unsigned int intfx_t;
  12
  13 US_LFUN (us_add, +, fx_t, ur, >)
  14 US_LFUN (us_sub, -, fx_t, ur, <)
  15
  16 #define VAL(N, X)                               \
  17     __attribute__((noinline,noclone))           \
  18     satfx_t us_add2_##N (satfx_t a)             \
  19     {                                           \
  20         return us_add_ur (a, X##P##-##16ur);    \
  21     }                                           \
  22     __attribute__((noinline,noclone))           \
  23     satfx_t us_add_##N (satfx_t a)              \
  24     {                                           \
  25         return a + X##P##-##16ur;               \
  26     }                                           \
  27     __attribute__((noinline,noclone))           \
  28     satfx_t us_sub2_##N (satfx_t a)             \
  29     {                                           \
  30         return us_sub_ur (a, X##P##-##16ur);    \
  31     }                                           \
  32     __attribute__((noinline,noclone))           \
  33     satfx_t us_sub_##N (satfx_t a)              \
  34     {                                           \
  35         return a - X##P##-##16ur;               \
  36     }
  37 #include "vals-ur.def"
  38 #undef VAL
  39
  40 satfx_t (* __flash const fun[])(satfx_t) =
  41 {
  42 #define VAL(N, X)                               \
  43   us_add_##N, us_add2_##N,                      \
  44   us_sub_##N, us_sub2_##N,
  45 #include "vals-ur.def"
  46 #undef VAL
  47 };
  48
  49
  50 const volatile __flash intfx_t vals[] =
  51   {
  52     0, -1, 1, -2, 2, -127, -128, -129,
  53     0x7f, 0x80, 0x81, 0x100,
  54     0x4000, 0x3e80, 0x3f80,
  55     0x7ffe, 0x7fff,
  56     0x7f7f, 0x7f81, 0x7f80,
  57     0x7f01,
  58     0x8000, 0x8001, 0x8080,
  59     0x8081, 0x80ff, 0x80fe,
  60     0x8100, 0x8180, 0x817f,
  61     0xff00, 0xff01, 0xff01,
  62     0xff7f, 0xff80
  63   };
  64
  65
  66 int main (void)
  67 {
  68   for (unsigned int i = 0; i < sizeof (vals) / sizeof (*vals); i++)
  69     {
  70       satfx_t a, f1, f2;
  71       intfx_t val = vals[i];
  72       __builtin_memcpy (&a, &val, sizeof (satfx_t));
  73       for (unsigned int f = 0; f < sizeof (fun) / sizeof (*fun); f += 2)
  74         {
  75           if (fun[f](a) != fun[f+1](a))
  76             abort();
  77         }
  78     }
  79
  80   exit (0);
  81   return 0;
  82 }