gcc/libgcc1-test.c

   1 /* This small function uses all the arithmetic operators that
   2    libgcc1.c can handle.  If you can link it, then
   3    you have provided replacements for all the libgcc1.c functions that
   4    your target machine needs.  */
   5
   6 int foo ();
   7 double dfoo ();
   8
   9 /* We don't want __main here because that can drag in atexit (among other
  10    things) which won't necessarily exist yet.  */
  11
  12 main_without__main ()
  13 {
  14   int a = foo (), b = foo ();
  15   unsigned int au = foo (), bu = foo ();
  16   float af = dfoo (), bf = dfoo ();
  17   double ad = dfoo (), bd = dfoo ();
  18
  19   discard (a * b);
  20   discard (a / b);
  21   discard (a % b);
  22
  23   discard (au / bu);
  24   discard (au % bu);
  25
  26   discard (a >> b);
  27   discard (a << b);
  28
  29   discard (au >> bu);
  30   discard (au << bu);
  31
  32   ddiscard (ad + bd);
  33   ddiscard (ad - bd);
  34   ddiscard (ad * bd);
  35   ddiscard (ad / bd);
  36   ddiscard (-ad);
  37
  38   ddiscard (af + bf);
  39   ddiscard (af - bf);
  40   ddiscard (af * bf);
  41   ddiscard (af / bf);
  42   ddiscard (-af);
  43
  44   discard ((int) ad);
  45   discard ((int) af);
  46
  47   ddiscard ((double) a);
  48   ddiscard ((float) a);
  49   ddiscard ((float) ad);
  50
  51   discard (ad == bd);
  52   discard (ad < bd);
  53   discard (ad > bd);
  54   discard (ad != bd);
  55   discard (ad <= bd);
  56   discard (ad >= bd);
  57
  58   discard (af == bf);
  59   discard (af < bf);
  60   discard (af > bf);
  61   discard (af != bf);
  62   discard (af <= bf);
  63   discard (af >= bf);
  64
  65   return 0;
  66 }
  67
  68 discard (x)
  69      int x;
  70 {}
  71
  72 ddiscard (x)
  73      double x;
  74 {}
  75
  76 foo ()
  77 {
  78   static int table[] = {20, 69, 4, 12};
  79   static int idx;
  80
  81   return table[idx++];
  82 }
  83
  84 double
  85 dfoo ()
  86 {
  87   static double table[] = {20.4, 69.96, 4.4, 202.202};
  88   static int idx;
  89
  90   return table[idx++];
  91 }
  92
  93 /* Provide functions that some versions of the linker use to default
  94    the start address if -e symbol is not used, to avoid the warning
  95    message saying the start address is defaulted.  */
  96 extern void start() __asm__("start");
  97 extern void _start() __asm__("_start");
  98 extern void __start() __asm__("__start");
  99
 100 void start() {}
 101 void _start() {}
 102 void __start() {}
 103 void mainCRTStartup() {}