compiler-rt/test/builtins/Unit/ctzti2_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_ctzti2
   3 // REQUIRES: int128
   4
   5 #include "int_lib.h"
   6 #include <stdio.h>
   7
   8 #ifdef CRT_HAS_128BIT
   9
  10 // Returns: the number of trailing 0-bits
  11
  12 // Precondition: a != 0
  13
  14 COMPILER_RT_ABI int __ctzti2(ti_int a);
  15
  16 int test__ctzti2(ti_int a, int expected)
  17 {
  18     int x = __ctzti2(a);
  19     if (x != expected)
  20     {
  21         twords at;
  22         at.all = a;
  23         printf("error in __ctzti2(0x%llX%.16llX) = %d, expected %d\n",
  24                at.s.high, at.s.low, x, expected);
  25     }
  26     return x != expected;
  27 }
  28
  29 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  30
  31 #endif
  32
  33 int main()
  34 {
  35 #ifdef CRT_HAS_128BIT
  36     if (test__ctzti2(0x00000001, 0))
  37         return 1;
  38     if (test__ctzti2(0x00000002, 1))
  39         return 1;
  40     if (test__ctzti2(0x00000003, 0))
  41         return 1;
  42     if (test__ctzti2(0x00000004, 2))
  43         return 1;
  44     if (test__ctzti2(0x00000005, 0))
  45         return 1;
  46     if (test__ctzti2(0x0000000A, 1))
  47         return 1;
  48     if (test__ctzti2(0x10000000, 28))
  49         return 1;
  50     if (test__ctzti2(0x20000000, 29))
  51         return 1;
  52     if (test__ctzti2(0x60000000, 29))
  53         return 1;
  54     if (test__ctzti2(0x80000000uLL, 31))
  55         return 1;
  56     if (test__ctzti2(0x0000050000000000uLL, 40))
  57         return 1;
  58     if (test__ctzti2(0x0200080000000000uLL, 43))
  59         return 1;
  60     if (test__ctzti2(0x7200000000000000uLL, 57))
  61         return 1;
  62     if (test__ctzti2(0x8000000000000000uLL, 63))
  63         return 1;
  64     if (test__ctzti2(make_ti(0x00000000A0000000LL, 0x0000000000000000LL), 93))
  65         return 1;
  66     if (test__ctzti2(make_ti(0xF000000000000000LL, 0x0000000000000000LL), 124))
  67         return 1;
  68     if (test__ctzti2(make_ti(0x8000000000000000LL, 0x0000000000000000LL), 127))
  69         return 1;
  70 #else
  71     printf("skipped\n");
  72 #endif
  73
  74    return 0;
  75 }