• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 //===-- Unittests for stdc_leading_zeros_ui -------------------------------===//
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_leading_zeros_ui.h"
11 #include "test/UnitTest/Test.h"
12 #include <stddef.h>
13 
TEST(LlvmLibcStdcLeadingZerosUiTest,Zero)14 TEST(LlvmLibcStdcLeadingZerosUiTest, Zero) {
15   EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ui(0U),
16             static_cast<unsigned>(INT_WIDTH));
17 }
18 
TEST(LlvmLibcStdcLeadingZerosUiTest,OneHot)19 TEST(LlvmLibcStdcLeadingZerosUiTest, OneHot) {
20   for (unsigned i = 0U; i != INT_WIDTH; ++i)
21     EXPECT_EQ(LIBC_NAMESPACE::stdc_leading_zeros_ui(1U << i),
22               INT_WIDTH - i - 1);
23 }
24