compiler-rt/test/builtins/Unit/umodti3_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_umodti3
   3 // REQUIRES: int128
   4 //===-- umodti3_test.c - Test __umodti3 -----------------------------------===//
   5 //
   6 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   7 // See https://llvm.org/LICENSE.txt for license information.
   8 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   9 //
  10 //===----------------------------------------------------------------------===//
  11 //
  12 // This file tests __umodti3 for the compiler_rt library.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "int_lib.h"
  17 #include <stdio.h>
  18
  19 #ifdef CRT_HAS_128BIT
  20
  21 // Returns: a % b
  22
  23 COMPILER_RT_ABI tu_int __umodti3(tu_int a, tu_int b);
  24
  25 int test__umodti3(tu_int a, tu_int b, tu_int expected_r)
  26 {
  27     tu_int r = __umodti3(a, b);
  28     if (r != expected_r)
  29     {
  30         utwords at;
  31         at.all = a;
  32         utwords bt;
  33         bt.all = b;
  34         utwords rt;
  35         rt.all = r;
  36         utwords expected_rt;
  37         expected_rt.all = expected_r;
  38         printf("error in __umodti3: 0x%llX%.16llX %% 0x%llX%.16llX = "
  39                "0x%llX%.16llX, expected 0x%llX%.16llX\n",
  40                at.s.high, at.s.low, bt.s.high, bt.s.low, rt.s.high, rt.s.low,
  41                expected_rt.s.high, expected_rt.s.low);
  42     }
  43     return r != expected_r;
  44 }
  45
  46 #endif
  47
  48 int main()
  49 {
  50 #ifdef CRT_HAS_128BIT
  51     if (test__umodti3(0, 1, 0))
  52         return 1;
  53     if (test__umodti3(2, 1, 0))
  54         return 1;
  55     if (test__umodti3(make_tu(0x8000000000000000uLL, 0), 1, 0x0uLL))
  56         return 1;
  57     if (test__umodti3(make_tu(0x8000000000000000uLL, 0), 2, 0x0uLL))
  58         return 1;
  59     if (test__umodti3(make_tu(0xFFFFFFFFFFFFFFFFuLL, 0xFFFFFFFFFFFFFFFFuLL),
  60                       2, 0x1uLL))
  61         return 1;
  62
  63 #else
  64     printf("skipped\n");
  65 #endif
  66     return 0;
  67 }