compiler-rt/test/builtins/Unit/absvdi2_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_absvdi2
   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 di_int __absvdi2(di_int a);
  13
  14 int test__absvdi2(di_int a)
  15 {
  16     di_int x = __absvdi2(a);
  17     di_int expected = a;
  18     if (expected < 0)
  19         expected = -expected;
  20     if (x != expected || expected < 0)
  21         printf("error in __absvdi2(0x%llX) = %lld, expected positive %lld\n",
  22                a, x, expected);
  23     return x != expected;
  24 }
  25
  26 int main()
  27 {
  28 //     if (test__absvdi2(0x8000000000000000LL))  // should abort
  29 //         return 1;
  30     if (test__absvdi2(0x0000000000000000LL))
  31         return 1;
  32     if (test__absvdi2(0x0000000000000001LL))
  33         return 1;
  34     if (test__absvdi2(0x0000000000000002LL))
  35         return 1;
  36     if (test__absvdi2(0x7FFFFFFFFFFFFFFELL))
  37         return 1;
  38     if (test__absvdi2(0x7FFFFFFFFFFFFFFFLL))
  39         return 1;
  40     if (test__absvdi2(0x8000000000000001LL))
  41         return 1;
  42     if (test__absvdi2(0x8000000000000002LL))
  43         return 1;
  44     if (test__absvdi2(0xFFFFFFFFFFFFFFFELL))
  45         return 1;
  46     if (test__absvdi2(0xFFFFFFFFFFFFFFFFLL))
  47         return 1;
  48
  49     int i;
  50     for (i = 0; i < 10000; ++i)
  51         if (test__absvdi2(((di_int)rand() << 32) | rand()))
  52             return 1;
  53
  54     return 0;
  55 }