compiler-rt/test/builtins/Unit/divdi3_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_divdi3
   3 //===-- divdi3_test.c - Test __divdi3 -------------------------------------===//
   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 __divdi3 for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17
  18 // Returns: a / b
  19
  20 COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b);
  21
  22 int test__divdi3(di_int a, di_int b, di_int expected)
  23 {
  24     di_int x = __divdi3(a, b);
  25     if (x != expected)
  26         printf("error in __divdi3: %lld / %lld = %lld, expected %lld\n",
  27                a, b, x, expected);
  28     return x != expected;
  29 }
  30
  31 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  32
  33 int main()
  34 {
  35     if (test__divdi3(0, 1, 0))
  36         return 1;
  37     if (test__divdi3(0, -1, 0))
  38         return 1;
  39
  40     if (test__divdi3(2, 1, 2))
  41         return 1;
  42     if (test__divdi3(2, -1, -2))
  43         return 1;
  44     if (test__divdi3(-2, 1, -2))
  45         return 1;
  46     if (test__divdi3(-2, -1, 2))
  47         return 1;
  48
  49     if (test__divdi3(0x8000000000000000LL, 1, 0x8000000000000000LL))
  50         return 1;
  51     if (test__divdi3(0x8000000000000000LL, -1, 0x8000000000000000LL))
  52         return 1;
  53     if (test__divdi3(0x8000000000000000LL, -2, 0x4000000000000000LL))
  54         return 1;
  55     if (test__divdi3(0x8000000000000000LL, 2, 0xC000000000000000LL))
  56         return 1;
  57
  58     return 0;
  59 }