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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_absvsi2
   3
   4 #include "int_lib.h"
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 // Returns: absolute value
   9
  10 // Effects: aborts if abs(x) < 0
  11
  12 COMPILER_RT_ABI si_int __absvsi2(si_int a);
  13
  14 int test__absvsi2(si_int a)
  15 {
  16     si_int x = __absvsi2(a);
  17     si_int expected = a;
  18     if (expected < 0)
  19         expected = -expected;
  20     if (x != expected || expected < 0)
  21         printf("error in __absvsi2(0x%X) = %d, expected positive %d\n",
  22                a, x, expected);
  23     return x != expected;
  24 }
  25
  26 int main()
  27 {
  28 //     if (test__absvsi2(0x80000000))  // should abort
  29 //         return 1;
  30     if (test__absvsi2(0x00000000))
  31         return 1;
  32     if (test__absvsi2(0x00000001))
  33         return 1;
  34     if (test__absvsi2(0x00000002))
  35         return 1;
  36     if (test__absvsi2(0x7FFFFFFE))
  37         return 1;
  38     if (test__absvsi2(0x7FFFFFFF))
  39         return 1;
  40     if (test__absvsi2(0x80000001))
  41         return 1;
  42     if (test__absvsi2(0x80000002))
  43         return 1;
  44     if (test__absvsi2(0xFFFFFFFE))
  45         return 1;
  46     if (test__absvsi2(0xFFFFFFFF))
  47         return 1;
  48
  49     int i;
  50     for (i = 0; i < 10000; ++i)
  51         if (test__absvsi2(rand()))
  52             return 1;
  53
  54     return 0;
  55 }