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Diffstat (limited to '')
| -rw-r--r-- | mfbt/tests/TestCountPopulation.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/mfbt/tests/TestCountPopulation.cpp b/mfbt/tests/TestCountPopulation.cpp new file mode 100644 index 0000000000..23234bbe5a --- /dev/null +++ b/mfbt/tests/TestCountPopulation.cpp @@ -0,0 +1,30 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/MathAlgorithms.h" + +using mozilla::CountPopulation32; + +static void TestCountPopulation32() { + MOZ_RELEASE_ASSERT(CountPopulation32(0xFFFFFFFF) == 32); + MOZ_RELEASE_ASSERT(CountPopulation32(0xF0FF1000) == 13); + MOZ_RELEASE_ASSERT(CountPopulation32(0x7F8F0001) == 13); + MOZ_RELEASE_ASSERT(CountPopulation32(0x3FFF0100) == 15); + MOZ_RELEASE_ASSERT(CountPopulation32(0x1FF50010) == 12); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00800000) == 1); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00400000) == 1); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00008000) == 1); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00004000) == 1); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00000080) == 1); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00000040) == 1); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00000001) == 1); + MOZ_RELEASE_ASSERT(CountPopulation32(0x00000000) == 0); +} + +int main() { + TestCountPopulation32(); + return 0; +} |