compiler-rt/test/builtins/Unit/divmodsi4_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_divmodsi4
   3 //===-- divmodsi4_test.c - Test __divmodsi4 -------------------------------===//
   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 __divmodsi4 for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17
  18 // Returns: a / b
  19
  20 extern COMPILER_RT_ABI si_int __divmodsi4(si_int a, si_int b, si_int* rem);
  21
  22
  23 int test__divmodsi4(si_int a, si_int b,
  24                                                 si_int expected_result, si_int expected_rem)
  25 {
  26         si_int rem;
  27     si_int result = __divmodsi4(a, b, &rem);
  28     if (result != expected_result) {
  29         printf("error in __divmodsi4: %d / %d = %d, expected %d\n",
  30                a, b, result, expected_result);
  31                 return 1;
  32         }
  33     if (rem != expected_rem) {
  34         printf("error in __divmodsi4: %d mod %d = %d, expected %d\n",
  35                a, b, rem, expected_rem);
  36                 return 1;
  37         }
  38
  39     return 0;
  40 }
  41
  42
  43 int main()
  44 {
  45     if (test__divmodsi4(0, 1, 0, 0))
  46         return 1;
  47     if (test__divmodsi4(0, -1, 0, 0))
  48         return 1;
  49
  50     if (test__divmodsi4(2, 1, 2, 0))
  51         return 1;
  52     if (test__divmodsi4(2, -1, -2, 0))
  53         return 1;
  54     if (test__divmodsi4(-2, 1, -2, 0))
  55         return 1;
  56     if (test__divmodsi4(-2, -1, 2, 0))
  57         return 1;
  58
  59         if (test__divmodsi4(7, 5, 1, 2))
  60         return 1;
  61         if (test__divmodsi4(-7, 5, -1, -2))
  62         return 1;
  63         if (test__divmodsi4(19, 5, 3, 4))
  64         return 1;
  65         if (test__divmodsi4(19, -5, -3, 4))
  66         return 1;
  67
  68         if (test__divmodsi4(0x80000000, 8, 0xf0000000, 0))
  69         return 1;
  70         if (test__divmodsi4(0x80000007, 8, 0xf0000001, -1))
  71         return 1;
  72
  73     return 0;
  74 }