compiler-rt/test/builtins/Unit/bswapsi2_test.c

   1 // UNSUPPORTED: armv6m-target-arch
   2 // RUN: %clang_builtins %s %librt -o %t && %run %t
   3 // REQUIRES: librt_has_bswapsi2
   4 //===-- bswapsi2_test.c - Test __bswapsi2 ---------------------------------===//
   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 __bswapsi2 for the compiler_rt library.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include <math.h>
  17 #include <stdint.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20
  21 extern uint32_t __bswapsi2(uint32_t);
  22
  23 int test__bswapsi2(uint32_t a, uint32_t expected) {
  24   uint32_t actual = __bswapsi2(a);
  25   if (actual != expected)
  26     printf("error in test__bswapsi2(0x%0X) = 0x%0X, expected 0x%0X\n", a,
  27            actual, expected);
  28   return actual != expected;
  29 }
  30
  31 int main() {
  32   if (test__bswapsi2(0x12345678, 0x78563412))
  33     return 1;
  34   if (test__bswapsi2(0x00000001, 0x01000000))
  35     return 1;
  36   return 0;
  37 }