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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_absvdi2
   3 //===-- absvdi2_test.c - Test __absvdi2 -----------------------------------===//
   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 __absvdi2 for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18
  19 // Returns: absolute value
  20
  21 // Effects: aborts if abs(x) < 0
  22
  23 COMPILER_RT_ABI di_int __absvdi2(di_int a);
  24
  25 int test__absvdi2(di_int a)
  26 {
  27     di_int x = __absvdi2(a);
  28     di_int expected = a;
  29     if (expected < 0)
  30         expected = -expected;
  31     if (x != expected || expected < 0)
  32         printf("error in __absvdi2(0x%llX) = %lld, expected positive %lld\n",
  33                a, x, expected);
  34     return x != expected;
  35 }
  36
  37 int main()
  38 {
  39 //     if (test__absvdi2(0x8000000000000000LL))  // should abort
  40 //         return 1;
  41     if (test__absvdi2(0x0000000000000000LL))
  42         return 1;
  43     if (test__absvdi2(0x0000000000000001LL))
  44         return 1;
  45     if (test__absvdi2(0x0000000000000002LL))
  46         return 1;
  47     if (test__absvdi2(0x7FFFFFFFFFFFFFFELL))
  48         return 1;
  49     if (test__absvdi2(0x7FFFFFFFFFFFFFFFLL))
  50         return 1;
  51     if (test__absvdi2(0x8000000000000001LL))
  52         return 1;
  53     if (test__absvdi2(0x8000000000000002LL))
  54         return 1;
  55     if (test__absvdi2(0xFFFFFFFFFFFFFFFELL))
  56         return 1;
  57     if (test__absvdi2(0xFFFFFFFFFFFFFFFFLL))
  58         return 1;
  59
  60     int i;
  61     for (i = 0; i < 10000; ++i)
  62         if (test__absvdi2(((di_int)rand() << 32) | rand()))
  63             return 1;
  64
  65     return 0;
  66 }