compiler-rt/test/builtins/Unit/modsi3_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_modsi3
   3 /* ===-- modsi3_test.c - Test __modsi3 -------------------------------------===
   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 __modsi3 for the compiler_rt library.
  12  *
  13  * ===----------------------------------------------------------------------===
  14  */
  15
  16 #include "int_lib.h"
  17 #include <stdio.h>
  18
  19 /* Returns: a % b */
  20
  21 COMPILER_RT_ABI si_int __modsi3(si_int a, si_int b);
  22
  23 int test__modsi3(si_int a, si_int b, si_int expected) {
  24     si_int x = __modsi3(a, b);
  25     if (x != expected)
  26         fprintf(stderr, "error in __modsi3: %d %% %d = %d, expected %d\n",
  27                a, b, x, expected);
  28     return x != expected;
  29 }
  30
  31 int main() {
  32     if (test__modsi3(0, 1, 0))
  33         return 1;
  34     if (test__modsi3(0, -1, 0))
  35         return 1;
  36
  37     if (test__modsi3(5, 3, 2))
  38         return 1;
  39     if (test__modsi3(5, -3, 2))
  40         return 1;
  41     if (test__modsi3(-5, 3, -2))
  42         return 1;
  43     if (test__modsi3(-5, -3, -2))
  44         return 1;
  45
  46     if (test__modsi3(0x80000000, 1, 0x0))
  47         return 1;
  48     if (test__modsi3(0x80000000, 2, 0x0))
  49         return 1;
  50     if (test__modsi3(0x80000000, -2, 0x0))
  51         return 1;
  52     if (test__modsi3(0x80000000, 3, -2))
  53         return 1;
  54     if (test__modsi3(0x80000000, -3, -2))
  55         return 1;
  56
  57     return 0;
  58 }