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

   1 //===-- ctzti2_test.c - Test __ctzti2 -------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file tests __ctzti2 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17 #ifdef CRT_HAS_128BIT
  18
  19 // Returns: the number of trailing 0-bits
  20
  21 // Precondition: a != 0
  22
  23 COMPILER_RT_ABI si_int __ctzti2(ti_int a);
  24
  25 int test__ctzti2(ti_int a, si_int expected)
  26 {
  27     si_int x = __ctzti2(a);
  28     if (x != expected)
  29     {
  30         twords at;
  31         at.all = a;
  32         printf("error in __ctzti2(0x%llX%.16llX) = %d, expected %d\n",
  33                at.s.high, at.s.low, x, expected);
  34     }
  35     return x != expected;
  36 }
  37
  38 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  39
  40 #endif
  41
  42 int main()
  43 {
  44 #ifdef CRT_HAS_128BIT
  45     if (test__ctzti2(0x00000001, 0))
  46         return 1;
  47     if (test__ctzti2(0x00000002, 1))
  48         return 1;
  49     if (test__ctzti2(0x00000003, 0))
  50         return 1;
  51     if (test__ctzti2(0x00000004, 2))
  52         return 1;
  53     if (test__ctzti2(0x00000005, 0))
  54         return 1;
  55     if (test__ctzti2(0x0000000A, 1))
  56         return 1;
  57     if (test__ctzti2(0x10000000, 28))
  58         return 1;
  59     if (test__ctzti2(0x20000000, 29))
  60         return 1;
  61     if (test__ctzti2(0x60000000, 29))
  62         return 1;
  63     if (test__ctzti2(0x80000000uLL, 31))
  64         return 1;
  65     if (test__ctzti2(0x0000050000000000uLL, 40))
  66         return 1;
  67     if (test__ctzti2(0x0200080000000000uLL, 43))
  68         return 1;
  69     if (test__ctzti2(0x7200000000000000uLL, 57))
  70         return 1;
  71     if (test__ctzti2(0x8000000000000000uLL, 63))
  72         return 1;
  73     if (test__ctzti2(make_ti(0x00000000A0000000LL, 0x0000000000000000LL), 93))
  74         return 1;
  75     if (test__ctzti2(make_ti(0xF000000000000000LL, 0x0000000000000000LL), 124))
  76         return 1;
  77     if (test__ctzti2(make_ti(0x8000000000000000LL, 0x0000000000000000LL), 127))
  78         return 1;
  79 #else
  80     printf("skipped\n");
  81 #endif
  82
  83    return 0;
  84 }