sys/external/bsd/compiler_rt/dist/test/Unit/subvsi3_test.c

   1 //===-- subvsi3_test.c - Test __subvsi3 -----------------------------------===//
   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 __subvsi3 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17
  18 // Returns: a - b
  19
  20 // Effects: aborts if a - b overflows
  21
  22 si_int __subvsi3(si_int a, si_int b);
  23
  24 int test__subvsi3(si_int a, si_int b)
  25 {
  26     si_int x = __subvsi3(a, b);
  27     si_int expected = a - b;
  28     if (x != expected)
  29         printf("error in test__subvsi3(0x%X, 0x%X) = %d, expected %d\n",
  30                a, b, x, expected);
  31     return x != expected;
  32 }
  33
  34 int main()
  35 {
  36 //     test__subvsi3(0x80000000, 1);  // should abort
  37 //     test__subvsi3(0, 0x80000000);  // should abort
  38 //     test__subvsi3(1, 0x80000000);  // should abort
  39 //     test__subvsi3(0x7FFFFFFF, -1);  // should abort
  40 //     test__subvsi3(-2, 0x7FFFFFFF);  // should abort
  41
  42     if (test__subvsi3(0x80000000, -1))
  43         return 1;
  44     if (test__subvsi3(0x80000000, 0))
  45         return 1;
  46     if (test__subvsi3(-1, 0x80000000))
  47         return 1;
  48     if (test__subvsi3(0x7FFFFFFF, 1))
  49         return 1;
  50     if (test__subvsi3(0x7FFFFFFF, 0))
  51         return 1;
  52     if (test__subvsi3(1, 0x7FFFFFFF))
  53         return 1;
  54     if (test__subvsi3(0, 0x7FFFFFFF))
  55         return 1;
  56     if (test__subvsi3(-1, 0x7FFFFFFF))
  57         return 1;
  58
  59     return 0;
  60 }