src/compiler-rt/test/builtins/Unit/absvsi2_test.c

   1 //===-- absvsi2_test.c - Test __absvsi2 -----------------------------------===//
   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 __absvsi2 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17
  18 // Returns: absolute value
  19
  20 // Effects: aborts if abs(x) < 0
  21
  22 COMPILER_RT_ABI si_int __absvsi2(si_int a);
  23
  24 int test__absvsi2(si_int a)
  25 {
  26     si_int x = __absvsi2(a);
  27     si_int expected = a;
  28     if (expected < 0)
  29         expected = -expected;
  30     if (x != expected || expected < 0)
  31         printf("error in __absvsi2(0x%X) = %d, expected positive %d\n",
  32                a, x, expected);
  33     return x != expected;
  34 }
  35
  36 int main()
  37 {
  38 //     if (test__absvsi2(0x80000000))  // should abort
  39 //         return 1;
  40     if (test__absvsi2(0x00000000))
  41         return 1;
  42     if (test__absvsi2(0x00000001))
  43         return 1;
  44     if (test__absvsi2(0x00000002))
  45         return 1;
  46     if (test__absvsi2(0x7FFFFFFE))
  47         return 1;
  48     if (test__absvsi2(0x7FFFFFFF))
  49         return 1;
  50     if (test__absvsi2(0x80000001))
  51         return 1;
  52     if (test__absvsi2(0x80000002))
  53         return 1;
  54     if (test__absvsi2(0xFFFFFFFE))
  55         return 1;
  56     if (test__absvsi2(0xFFFFFFFF))
  57         return 1;
  58
  59     int i;
  60     for (i = 0; i < 10000; ++i)
  61         if (test__absvsi2(rand()))
  62             return 1;
  63
  64     return 0;
  65 }