gdb/testsuite/gdb.arch/mips-octeon-bbit.c

   1 typedef unsigned long long uint64_t;
   2 void abort (void);
   3
   4 #define BASE 0x1234567812345678ull
   5
   6 #define DEF_BBIT_TAKEN(BRANCH_IF, BIT)                                  \
   7   int bbit_is_taken_##BRANCH_IF##_##BIT (volatile uint64_t *p)          \
   8   {                                                                     \
   9     int ret;                                                            \
  10     asm (".set push                             \n\t"                   \
  11          ".set noreorder                        \n\t"                   \
  12          "bbit" #BRANCH_IF " %1, " #BIT ", 1f   \n\t"                   \
  13          "nop                                   \n\t"                   \
  14          "li %0, 0                              \n\t"                   \
  15          "b 2f                                  \n\t"                   \
  16          "nop                                   \n\t"                   \
  17          "1:                                    \n\t"                   \
  18          "li %0, 1                              \n\t"                   \
  19          "2:                                    \n\t"                   \
  20          ".set pop"                                                     \
  21          : "=r"(ret) : "r"(*p));                                        \
  22     return ret;                                                         \
  23   }                                                                     \
  24   volatile uint64_t taken_##BRANCH_IF##_##BIT =                         \
  25     BASE & (~(1ull << BIT)) | ((uint64_t) BRANCH_IF << BIT);            \
  26   volatile uint64_t not_taken_##BRANCH_IF##_##BIT =                     \
  27     BASE & (~(1ull << BIT)) | (((uint64_t) !BRANCH_IF) << BIT);
  28
  29 DEF_BBIT_TAKEN (0, 10);
  30 DEF_BBIT_TAKEN (0, 36);
  31 DEF_BBIT_TAKEN (1, 20);
  32 DEF_BBIT_TAKEN (1, 49);
  33
  34 #define EXPECT(X) if (!(X)) abort ();
  35
  36 main ()
  37 {
  38   EXPECT (bbit_is_taken_0_10 (&taken_0_10));
  39   EXPECT (!bbit_is_taken_0_10 (&not_taken_0_10));
  40
  41   EXPECT (bbit_is_taken_0_36 (&taken_0_36));
  42   EXPECT (!bbit_is_taken_0_36 (&not_taken_0_36));
  43
  44   EXPECT (bbit_is_taken_1_20 (&taken_1_20));
  45   EXPECT (!bbit_is_taken_1_20 (&not_taken_1_20));
  46
  47   EXPECT (bbit_is_taken_1_49 (&taken_1_49));
  48   EXPECT (!bbit_is_taken_1_49 (&not_taken_1_49));
  49 }