compiler-rt/test/builtins/Unit/subvsi3_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_subvsi3
   3
   4 #include "int_lib.h"
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 // Returns: a - b
   9
  10 // Effects: aborts if a - b overflows
  11
  12 COMPILER_RT_ABI si_int __subvsi3(si_int a, si_int b);
  13
  14 int test__subvsi3(si_int a, si_int b)
  15 {
  16     si_int x = __subvsi3(a, b);
  17     si_int expected = a - b;
  18     if (x != expected)
  19         printf("error in test__subvsi3(0x%X, 0x%X) = %d, expected %d\n",
  20                a, b, x, expected);
  21     return x != expected;
  22 }
  23
  24 int main()
  25 {
  26 //     test__subvsi3(0x80000000, 1);  // should abort
  27 //     test__subvsi3(0, 0x80000000);  // should abort
  28 //     test__subvsi3(1, 0x80000000);  // should abort
  29 //     test__subvsi3(0x7FFFFFFF, -1);  // should abort
  30 //     test__subvsi3(-2, 0x7FFFFFFF);  // should abort
  31
  32     if (test__subvsi3(0x80000000, -1))
  33         return 1;
  34     if (test__subvsi3(0x80000000, 0))
  35         return 1;
  36     if (test__subvsi3(-1, 0x80000000))
  37         return 1;
  38     if (test__subvsi3(0x7FFFFFFF, 1))
  39         return 1;
  40     if (test__subvsi3(0x7FFFFFFF, 0))
  41         return 1;
  42     if (test__subvsi3(1, 0x7FFFFFFF))
  43         return 1;
  44     if (test__subvsi3(0, 0x7FFFFFFF))
  45         return 1;
  46     if (test__subvsi3(-1, 0x7FFFFFFF))
  47         return 1;
  48
  49     return 0;
  50 }