xref: /llvm-project/libc/test/src/stdbit/stdc_has_single_bit_ull_test.cpp (revision eaa0d3b1336b82df01ff50dfbe50bb8cdd7ada87) 
1 //===-- Unittests for stdc_has_single_bit_ull -----------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "src/__support/CPP/limits.h"
10 #include "src/stdbit/stdc_has_single_bit_ull.h"
11 #include "test/UnitTest/Test.h"
12 
TEST(LlvmLibcStdcHasSingleBitUllTest,Zero)13 TEST(LlvmLibcStdcHasSingleBitUllTest, Zero) {
14   EXPECT_EQ(LIBC_NAMESPACE::stdc_has_single_bit_ull(0U), false);
15 }
16 
TEST(LlvmLibcStdcHasSingleBitUllTest,OneHot)17 TEST(LlvmLibcStdcHasSingleBitUllTest, OneHot) {
18   for (unsigned i = 0U; i != ULLONG_WIDTH; ++i)
19     EXPECT_EQ(LIBC_NAMESPACE::stdc_has_single_bit_ull(1ULL << i), true);
20 }
21