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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_subvsi3
   3 //===-- subvsi3_test.c - Test __subvsi3 -----------------------------------===//
   4 //
   5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   6 // See https://llvm.org/LICENSE.txt for license information.
   7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   8 //
   9 //===----------------------------------------------------------------------===//
  10 //
  11 // This file tests __subvsi3 for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18
  19 // Returns: a - b
  20
  21 // Effects: aborts if a - b overflows
  22
  23 COMPILER_RT_ABI si_int __subvsi3(si_int a, si_int b);
  24
  25 int test__subvsi3(si_int a, si_int b)
  26 {
  27     si_int x = __subvsi3(a, b);
  28     si_int expected = a - b;
  29     if (x != expected)
  30         printf("error in test__subvsi3(0x%X, 0x%X) = %d, expected %d\n",
  31                a, b, x, expected);
  32     return x != expected;
  33 }
  34
  35 int main()
  36 {
  37 //     test__subvsi3(0x80000000, 1);  // should abort
  38 //     test__subvsi3(0, 0x80000000);  // should abort
  39 //     test__subvsi3(1, 0x80000000);  // should abort
  40 //     test__subvsi3(0x7FFFFFFF, -1);  // should abort
  41 //     test__subvsi3(-2, 0x7FFFFFFF);  // should abort
  42
  43     if (test__subvsi3(0x80000000, -1))
  44         return 1;
  45     if (test__subvsi3(0x80000000, 0))
  46         return 1;
  47     if (test__subvsi3(-1, 0x80000000))
  48         return 1;
  49     if (test__subvsi3(0x7FFFFFFF, 1))
  50         return 1;
  51     if (test__subvsi3(0x7FFFFFFF, 0))
  52         return 1;
  53     if (test__subvsi3(1, 0x7FFFFFFF))
  54         return 1;
  55     if (test__subvsi3(0, 0x7FFFFFFF))
  56         return 1;
  57     if (test__subvsi3(-1, 0x7FFFFFFF))
  58         return 1;
  59
  60     return 0;
  61 }