test/Unit/divdi3_test.c

   1 //===-- divdi3_test.c - Test __divdi3 -------------------------------------===//
   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 __divdi3 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17 // Returns: a / b
  18
  19 di_int __divdi3(di_int a, di_int b);
  20
  21 int test__divdi3(di_int a, di_int b, di_int expected)
  22 {
  23     di_int x = __divdi3(a, b);
  24     if (x != expected)
  25         printf("error in __divdi3: %lld / %lld = %lld, expected %lld\n",
  26                a, b, x, expected);
  27     return x != expected;
  28 }
  29
  30 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  31
  32 int main()
  33 {
  34     if (test__divdi3(0, 1, 0))
  35         return 1;
  36     if (test__divdi3(0, -1, 0))
  37         return 1;
  38
  39     if (test__divdi3(2, 1, 2))
  40         return 1;
  41     if (test__divdi3(2, -1, -2))
  42         return 1;
  43     if (test__divdi3(-2, 1, -2))
  44         return 1;
  45     if (test__divdi3(-2, -1, 2))
  46         return 1;
  47
  48     if (test__divdi3(0x8000000000000000LL, 1, 0x8000000000000000LL))
  49         return 1;
  50     if (test__divdi3(0x8000000000000000LL, -1, 0x8000000000000000LL))
  51         return 1;
  52     if (test__divdi3(0x8000000000000000LL, -2, 0x4000000000000000LL))
  53         return 1;
  54     if (test__divdi3(0x8000000000000000LL, 2, 0xC000000000000000LL))
  55         return 1;
  56
  57     return 0;
  58 }